GRB 131030A
GCN Circular 15402
Subject
GRB 131030A: Swift detection of a burst with an optical counterpart
Date
2013-10-30T21:08:51Z (12 years ago)
From
David Palmer at LANL <palmer@lanl.gov>
E. Troja (NASA/GSFC/UMCP), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
J. R. Cummings (NASA/UMBC), J. A. Kennea (PSU),
H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (PSU),
C. B. Markwardt (NASA/GSFC), A. Maselli (INAF-IASFPA),
K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU),
B. Sbarufatti (INAF-OAB/PSU), C. A. Swenson (PSU) and
T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 20:56:18 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 131030A (trigger=576238). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 345.080, -5.389 which is
RA(J2000) = 23h 00m 19s
Dec(J2000) = -05d 23' 20"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed multiple peaks
structure with a duration of about 45 sec. The peak count rate
was ~31500 counts/sec (15-350 keV), at ~6 sec after the trigger.
The XRT began observing the field at 20:57:37.1 UT, 78.4 seconds after
the BAT trigger. XRT found a bright, uncatalogued X-ray source located
at RA, Dec 345.0657, -5.3659 which is equivalent to:
RA(J2000) = +23h 00m 15.77s
Dec(J2000) = -05d 21' 57.2"
with an uncertainty of 5.1 arcseconds (radius, 90% containment). This
location is 97 arcseconds from the BAT onboard position, within the BAT
error circle. No event data are yet available to determine the column
density using X-ray spectroscopy.
The initial flux in the 0.1 s image was 5.43e-08 erg cm^-2 s^-1 (0.2-10
keV).
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 89 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 23:00:16.13 = 345.06720
DEC(J2000) = -05:22:05.1 = -5.36808
with a 90%-confidence error radius of about 0.74 arc sec. This position is 9.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
14.97 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.06.
Burst Advocate for this burst is E. Troja (eleonora.troja AT nasa.gov).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular 15403
Subject
GRB 131030A: Watcher OT detection
Date
2013-10-30T21:54:06Z (12 years ago)
From
Petr Kubanek at AIO <pkubanek@gmail.com>
Petr Kub��nek (Porsche Engineering Services s.r.o. & Institute of
Physics, Czech Republic), Martin Topinka, Lorraine Hanhol, Seamus Meehan
(UCD, Ireland) reports on behalf of wider collaboration:
Watcher telescope at Boyden Observatory, South Africa, running RTS2
observatory control system, started automatic observation of GRB 131030A
(GCN 15402, E.Troja et.al.) at 20:57:24.070 UT. On image acquired on
20:58:49.830 UT, e.g. 171s post GRB, we clearly identify optical
counterpart mentioned at the above GCN.
Futher observations, as well as analysis, are ongoing.
GCN Circular 15405
Subject
GRB 131030A: MASTER optical observation
Date
2013-10-30T22:07:29Z (12 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
E. Gorbovskoy, V. Lipunov, D. Denisenko, V. Kornilov, A. Kuznetsov, D.
Kuvshinov, N. Tyurina, N. Shatskiy, P. Balanutsa, D.
Zimnukhov, V.V. Chazov
Lomonosov Moscow State University, Sternberg Astronomical Institute
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V. Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
K. Ivanov, S. Yazev, N.M. Budnev, O. Gres, O. Chuvalaev, V.A. Poleshchuk
Irkutsk State University
V. Yurkov, Yu. Sergienko, D. Varda, E. Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
V. Krushinski, I. Zalozhnich, A. Popov, A. Bourdanov
Ural Federal University
H. Levato and C. Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
C. Mallamaci, C. Lopez and F. Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Kislovodsk was pointed to the GRB131030A 50 min (3000s) after
GRB time at 2013-10-30 21-46-10.273 UT.
On our first (180 sec) images we found optical transient within SWIFT
error-box (E. Troja et. al GCN15402).
The unfiltred magnitude is 16.5;
The 5-sigma upper limit has been about 19.0 mag.
So long pointing time was due to with daily power cut on the observatory.
The message may be cited.
GCN Circular 15406
Subject
GRB 131030A - Liverpool Telescope Optical Afterglow Confirmation
Date
2013-10-30T22:17:57Z (12 years ago)
From
Carole Mundell at ARI, JMU,Liverpool <cgm@astro.livjm.ac.uk>
F.J. Virgili, C.G. Mundell (LJMU), J. Japelj, A. Gomboc (U.
Ljubljana), R.J. Smith (LJMU), A. Melandri (INAF-OAB) report:
The 2-m Liverpool Telescope robotically followed up GRB 131030A (Swift
Trigger 576238; Troja et al. GCN 15402) immediately after the GRB
trigger time. The automated procedure detected an uncatalogued source
at the location of the UVOT source. We confirm the fading nature of the
object with
R = 16.9 � 0.2 mag (vs. USNOB1) 34.8 min after the burst.
thereby confirming this as the GRB afterglow.
Observations and analysis are ongoing.
GCN Circular 15407
Subject
GRB 131030A: NOT redshift
Date
2013-10-30T22:48:32Z (12 years ago)
From
Dong Xu at DARK/NBI <dong.dark@gmail.com>
D. Xu, J. P. U. Fynbo (DARK/NBI), P. Jakobsson, Z. Cano (U. Iceland),
B. Milvang-Jensen, D. Malesani (DARK/NBI), A. de Ugarte Postigo
(IAA-CSIC, DARK/NBI) & M. Hayes (Stockholm University) report on
behalf of a larger collaboration:
We observed the optical afterglow of GRB 131030A (Troja et al., GCN
15402) with the NOT equipped with the AlFOSC instrument. The transient
is clearly detected in our acquisition image with a magnitude R ~ 17
at a mean time of 0.569 hr after the GRB.
A single spectrum of 1200 s covering the range from 3800 to 8000 AA
was obtained with a mean epoch of 0.894 hr after the burst. The
spectrum displays a strong continuum with features of Fe II, Mg II and
Al II at a common redshift of z = 1.293 (wavelength calibration based
on archival data), which we identify as the redshift of the GRB. We
also detect an intervening system at z = 1.16 displaying Fe II and Mg
II.
GCN Circular 15408
Subject
GRB 131030A: Spectroscopy from 10.4m GTC
Date
2013-10-30T22:51:59Z (12 years ago)
From
Antonio de Ugarte Postigo at IAA-CSIC <deugarte@iaa.es>
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), C.C. Thoene (IAA-CSIC),
R. Sanchez-Ramirez (IAA-CSIC), J. Gorosabel (IAA-CSIC),
J.P.U. Fynbo (DARK/NBI), N.R. Tanvir (U. Leicester) and
C.A. Alvarez Iglesias (ULL/IAC) report on behalf of a larger collaboration:
We have observed the afterglow of GRB131030A (Troja et al. GCN 15402)
with the 10.4m GTC telescope at Roque de los Muchachos Observatory (Spain)
starting at 21:50 UT (54 min after the burst). We used the R2000B grism that covers
the range from 3950 to 5700 A at a resolution of ~2200.
A single 600s exposure reduced with archive calibrations shows a strong trace
with absorption features of AlIII, ZnII, CrII, NiII, FeII, NiII* and FeII* at a common redshift
of z=1.295, which we identify as the redshift of the GRB. An additional intervening
system is seen at z=1.164, with lines of AlIII, FeII and MnII.
GCN Circular 15410
Subject
GRB 131030A: D50+BART detection and light curve optical decay
Date
2013-10-31T01:31:14Z (12 years ago)
From
Jan Strobl at AI AS CR,Ondrejov <jan@strobl.cz>
Jan Strobl (1,3), Martin Jelinek (2), Cyril Polasek (1), Michal Jakubec
(1), Petr Skala (1,3) and Rene Hudec (1,3)
(1. AI ASCR Ondrejov, 2. IAA CSIC Granada, 3. FEE CTU Prague)
We observed the field of the Swift GRB 131030A (Troja et al., GCNC 15402)
with the 0.5m telescope D50 and 0.25m telescope BART in Ondrejov (Czech
Republic), starting at 20:57:16 UT, i.e. 56s after the trigger.
The optical afterglow (Virgili et al, GCNC 15406) is clearly detected in
our images. After an initial peak of about 13.8m (unfiltered, calibrated
using USNO-B R-band) the lightcurve decays with \alpha~0.9.
This message can be cited.
GCN Circular 15411
Subject
GRB 131030A: 1.23m CAHA BVRI-band observations
Date
2013-10-31T02:14:28Z (12 years ago)
From
Javier Gorosabel at IAA-CSIC <jgu@iaa.es>
V. Terron (IAA/CSIC), M. Fernandez (IAA/CSIC), J. Gorosabel (IAA/CSIC-UPV/EHU), report on behalf of a larger collaboration:
We imaged the GRB131030A (GCNC 15402) optical afterglow (GCNC 15403, 15405, 14506, 15410) with the 1.23m CAHA telescope. Two BVRI-band series were taken starting 2.01 hr post burst. The optical afterglow is well detected in the four bands at a level of R~18.0 (Vega), calibrated against the USNO B1.0 catalog.
GCN Circular 15412
Subject
GRB 131030A: SAO RAS optical observations
Date
2013-10-31T10:36:52Z (12 years ago)
From
Vladimir Sokolov at SAO RAS <sokolov@sao.ru>
A. S. Moskvitin,
reports on behalf of SAO RAS GRB follow-up team:
We observed the field of GRB 131030A (Troja et al., GCN#15402)
with the 1-meter telescope Zeiss-1000 of Special Astrophysical
Observatory of RAS in four bands: B, V, Rc, Ic. Observations
were started since 23 minutes after the Swift trigger.
The weather conditions were excellent, but the air masses of
the object was about 3-6.
Optical counterpart was clearly detected at all images.
Preliminary results of Rc band photometry are as following:
T_mid, UT T - T0, h exposure, s R mag +/- error
21:18:45 0.374 60 16.55 +/- 0.02
21:34:05 0.630 60 17.09 +/- 0.03
21:44:14 0.799 120 17.26 +/- 0.02
21:56:27 1.003 120 17.39 +/- 0.03
22:07:26 1.186 120 17.53 +/- 0.03
22:21:30 1.420 360 17.63 +/- 0.02
22:30:08 1.564 480 17.69 +/- 0.03
The magnitudes were calibrated against the set of USNO B1 stars
(R2) and not corrected for the Galaxy extinction.
Rc band light curve and the first image is shown at
ftp://ftp.sao.ru/pub/grb/GRB131030A/GRB131030A_image_LC.jpg
GCN Circular 15413
Subject
Konus-Wind observation of GRB 131030A
Date
2013-10-31T10:40:11Z (12 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin,
P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf
of the Konus-Wind team, report:
The long-duration GRB 131030A
(Swift-BAT trigger 576238: Troja, et al., GCN 15402)
triggered Konus-Wind at T0=75377.811 s UT (20:56:17.811).
The burst light curve shows a multi-peaked pulse from
~T0-3 s till ~T0+25 s.
The emission is seen up to ~10 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB131030_T75377/
As observed by Konus-Wind, the burst
had a fluence of (6.6 � 0.4)x10-5 erg/cm2,
and a 64-ms peak flux, measured from T0+11.648 s,
of (1.0 � 0.1)x10-5 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum (measured from T0 to T0+27.904 s)
is best fit in the 20 keV - 15 MeV range
by the GRB (Band) function with the following model parameters:
the low-energy photon index alpha = -0.71 � 0.12,
the high energy photon index beta = -2.95 � 0.28,
the peak energy Ep = 177 � 10 keV,
chi2 = 76/96 dof.
Assuming the redshift z=1.293 (Xu, et al., GCN 15407;
de Ugarte Postigo, et al., GCN 15408),
and a standard cosmology model with H_0 = 70 km/s/Mpc,
Omega_M = 0.27, and Omega_Lambda = 0.73,
we estimate the following rest-frame parameters:
the isotropic energy release E_iso is (3.0 � 0.2)x10^53 erg,
the peak luminosity L_iso is (1.0 � 0.1)x10^53 erg/s,
and the rest-frame peak energy Ep,i = (406 � 22) keV
All the quoted values are preliminary.
GCN Circular 15414
Subject
GRB 131030A: Swift/UVOT Detection
Date
2013-10-31T11:46:48Z (12 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and E. Troja (NASA/GSFC/UMCP)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131030A 90
s after the BAT trigger (Troja et al., GCN Circ. 15402). A fading source
consistent with the XRT position (Troja et al. GCN Circ. 15402) is
clearly detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 23:00:16.14 = 345.06723 (deg.)
Dec (J2000) = -05:22:05.2 = -5.36811 (deg.)
with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).
Preliminary detections using the UVOT photometric system (Breeveld et
al. 2011, AIP Conf. Proc. 1358, 373) for the finding chart (FC) and
other early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 90 239 148 14.87 � 0.02
white 582 601 20 16.13 � 0.05
u_FC 302 552 246 15.30 � 0.03
b 557 577 20 16.30 � 0.08
v 631 651 19 15.98 � 0.13
uvw1 681 701 19 16.42 � 0.17
uvm2 656 676 20 16.63 � 0.24
uvw2 606 626 20 17.97 � 0.36
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.06 in the direction of the
burst (Schlegel et al. 1998).
GCN Circular 15416
Subject
GRB 131030A: Enhanced Swift-XRT position
Date
2013-10-31T12:00:09Z (12 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester)
report on behalf of the Swift-XRT team.
Using 2695 s of XRT Photon Counting mode data and 7 UVOT
images for GRB 131030A, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 345.06732, -5.36845 which is equivalent
to:
RA (J2000): 23h 00m 16.16s
Dec (J2000): -05d 22' 06.4"
with an uncertainty of 1.4 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest
position can be viewed at http://www.swift.ac.uk/xrt_positions. Position
enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the
Swift-XRT team.
GCN Circular 15417
Subject
GRB 131030A: Swift-XRT refined Analysis
Date
2013-10-31T14:09:03Z (12 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
A. Melandri (INAF-OAB), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A.
Kennea (PSU), B.P. Gompertz (U. Leicester), J.P. Osborne (U.
Leicester), K.L. Page (U. Leicester), B. Sbarufatti (INAF-OAB/PSU), P.
D'Avanzo (INAF-OAB) and E. Troja report on behalf of the Swift-XRT
team:
We have analysed 6.9 ks of XRT data for GRB 131030A (Troja et al. GCN
Circ. 15402), from 68 s to 41.4 ks after the BAT trigger. The data
comprise 1.0 ks in Windowed Timing (WT) mode (the first 9 s were taken
while Swift was slewing) with the remainder in Photon Counting (PC)
mode. The enhanced XRT position for this burst was given by Evans et
al. (GCN. Circ 15416).
The late-time light curve (from T0+4.3 ks) can be modelled with a
power-law decay with a decay index of alpha=1.18 (+0.06, -0.07).
A spectrum formed from the WT mode data can be fitted with an absorbed
power-law with a photon spectral index of 2.11 (+/-0.03). The
best-fitting absorption column is 1.17 (+/-0.07) x 10^21 cm^-2, in
excess of the Galactic value of 4.7 x 10^20 cm^-2 (Kalberla et al.
2005). The PC mode spectrum has a photon index of 2.09 (+0.13, -0.12)
and a best-fitting absorption column of 1.16 (+0.30, -0.28) x 10^21
cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion
factor deduced from this spectrum is 3.5 x 10^-11 (4.7 x 10^-11) erg
cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 1.16 (+0.30, -0.28) x 10^21 cm^-2
Galactic foreground: 4.7 x 10^20 cm^-2
Excess significance: 4.0 sigma
Photon index: 2.09 (+0.13, -0.12)
If the light curve continues to decay with a power-law decay index of
1.18, the count rate at T+24 hours will be 0.055 count s^-1,
corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.9 x
10^-12 (2.6 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00576238.
This circular is an official product of the Swift-XRT team.
GCN Circular 15418
Subject
GRB 131030A: T21 optical observations
Date
2013-10-31T15:45:15Z (12 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill
Observatory, Varkaus, Finland) report:
We have detected GRB 131030A optical afterglow at iTelescope observatory
T21 (Mayhill, New Mexico). We used 0.43-m/6.8 astrograph and FLI-PL6303E
CCD. Three unfiltered images and three photometric R filter images with 600 sec
exposure time were made.
The afterglow was detected at the following position RA 23:00:16.17 and
DEC -05:22:05.0.
The following magnitudes were obtained from the observations using
NOMAD1 0846-0702870 (R=17.120) as a comparison star:
Tmid(h)+T0 Filter Exp. time (sec) Mag Mag err.
8.53 unfiltered 3x600 18.57CR 0.12
9.26 R 3x600 19.43R 0.24
GCN Circular 15419
Subject
GRB 131030A: TAROT La Silla observatory optical observations
Date
2013-10-31T16:05:28Z (12 years ago)
From
Bruce Gendre at ASDC <bruce.gendre@gmail.com>
Klotz A. (IRAP-CNRS-OMP), Gendre B. (ARTEMIS),
Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:
We imaged the field of GRB 131030A detected by SWIFT (trigger 576238,
Troja et al. GCN 15402) with the TAROT robotic telescope (D=25cm)
located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 2.85h after the GRB trigger. The elevation of
the field increased from 59 degrees above horizon and weather conditions
were good.
We clearly detected the fading counterpart mentioned by previous teams
(Virgili et al., GCN 15406, Strob et al. GCN 15410) from T0+2.85h to
T0+9.13h
This message may be cited.
GCN Circular 15420
Subject
GRB 131030A: RATIR Optical and NIR Observations
Date
2013-10-31T17:08:16Z (12 years ago)
Edited On
2024-11-07T18:52:28Z (7 months ago)
From
Owen Littlejohns at Az State U <olittlej@asu.edu>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),
Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G.
Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC),
Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), José A. de
Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM),
Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey
Moseley (GSFC) report:
We observed the field of GRB 131030A (Troja, et al., GCN 15402) with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the
1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on
Sierra San Pedro Mártir from 2013/10 31.08 to 2013/10 31.37 UTC (4.91
to 11.97 hours after the BAT trigger), obtaining a total of 4.26 hours
exposure in the r and i bands and 1.69 hours exposure in the Z,
Y, J, and H bands.
We detect the uncatalogued source reported by UVOT (Troja et al., GCN
Circ. 15414). In comparison with the SDSS DR9 and 2MASS, we obtain the
following detections:
r 19.14 +/- 0.01
i 18.92 +/- 0.01
Z 18.76 +/- 0.02
Y 18.61 +/- 0.02
J 18.62 +/- 0.02
H 18.40 +/- 0.02
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. We can confirm that this source
fades during our observations with power-law decay indices of approximately
t^-0.9 in the r, i, Z and Y bands and a shallower decay of t^-0.5 and
t^-0.4 in the J and H bands, respectively.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 15423
Subject
GRB 131030A: P60 observations
Date
2013-11-01T00:48:58Z (12 years ago)
From
Daniel Perley at Caltech <dperley@astro.caltech.edu>
D. A. Perley (Caltech) and S. B. Cenko (NASA/GSFC) report on behalf of a
larger collaboration:
We observed the afterglow of GRB 131030A (GCN 15402, Troja et al.) with
the robotic Palomar 60-inch telescope in the g, r, i, and z filters.
Three exposures of 180 seconds each were acquired in each filter at four
separate epochs starting at 5.09, 6.63, 8.12, and 9.65 hours after the
Swift trigger, respectively. The light curve in these bands shows a
steady power-law decline with decay index alpha~0.95, similar to that
reported by RATIR over the same timescale (GCN 15420, Littlejohns et al.)
Photometry from the first epoch (calibrated relative to SDSS) yields:
t_mid(d) exp(s) filter magnitude
0.21434 3x180 g = 19.14 +/- 0.02
0.21912 3x180 r = 18.81 +/- 0.02
0.22391 3x180 i = 18.61 +/- 0.03
GCN Circular 15425
Subject
GRB131030A : xinglong TNT optical observation
Date
2013-11-01T07:29:08Z (12 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
L. P. Xin, J. Y. Wei, Y. L. Qiu, J. S. Deng, J. Wang,
X. H. Han and C. Wu on behalf of EAFON report:
We began to observe GRB 131030A (Troja et al. GCN 15402)
with Xinglong 0.8-m TNT telescope at 13:59:04 (UT) , Oct. 31th,
about 17 hours after the burst. 10*300 sec R-band images were obtained.
The optical counterpart (Troja et al. GCN 15402) was clearly detected
with a magnitude of 19.4+/-0.1 mag in R band, calibrated by USNO B1.0 R2mag
at the mean time of 17.397h after the burst.
This message may be cited.
GCN Circular 15427
Subject
GRB 131030A: Bassano Bresciano Observatory optical observations
Date
2013-11-01T09:20:06Z (12 years ago)
From
Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>
U.Quadri, L.Strabla and R.Girelli report:
We imaged the field of GRB 131030A detected by SWIFT
(trigger 576238,Troja et al. GCN 15402) with the robotic
telescope of (IAU station 565) Bassano Bresciano
Observatory, Italy.
The observations started 20h 11m. after the
GRB trigger,with our schmidt telescope
D=320 mm F/D=3.1.
Weather conditions were good.
We co-added a series of 30 unfiltered CCD exposures of 120sec.
We detect a (fading) afterglow in the error box given by SWIFT.
at the following position (+/- 3 arcsec):
RA (J2000.0) = 23h 00m 16.12s
DEC(J2000.0) = -05d 22p 06.9s
The results of our photometry are:
Date UT Vmag +/- err
Middle
2013-10-31 17:40:39 19.17 0.21
2013-10-31 18:22:02 19.62 0.28
2013-10-31 19:04:46 20.45 0.22
Magnitudes were estimated with the USNO-B1 cat.
and are not corrected for galactic dust extinction.
The message may be cited.
GCN Circular 15430
Subject
GRB 131030A - RoboPol optical afterglow polarimetry
Date
2013-11-01T13:16:41Z (12 years ago)
From
Dmitry Blinov at U of Crete/FORTH <blinov@physics.uoc.gr>
M. Balokovic, T. Hovatta, O. King, T. Pearson, A. Readhead
Caltech, USA
D. Blinov, N. Kylafis, G. Panopoulou, I. Papadakis, I. Papamastorakis,
V. Pavlidou, P. Reig, K. Tassis
University of Crete/FORTH, Greece
P. Khodade, C. Rajarshi, A. Ramaprakash, R. Rouneq
Inter-University Centre for Astronomy and Astrophysics, India
E. Angelakis, I. Myserlis, L. Fuhrmann, J. A. Zensus
Max Planck Institute for Radio Astronomy, Germany
R. Feiler, A. Kus, B. Pazderska, E. Pazderski
Nicolaus Copernicus University, Poland
We observed GRB 131030A (Swift Trigger 576238; Troja et al. GCN 15402)
using the RoboPol (http://robopol.org) polarimeter on the 1.3m Skinakas
observatory telescope (Greece). We confirm the presence of an uncatalogued
source at the location (RA=23h00m16s, Dec=-05d22m05s). Preliminary analysis
showed that emission of the source is linearly polarized at high significance.
Further analysis will be presented elsewhere.
[GCN OPS NOTE(01nov13): This was delayed in distribution by 17 hours because
a new entry in the list had to be added.]
GCN Circular 15432
Subject
LOAO B,R Observation of GRB131030A
Date
2013-11-01T13:34:48Z (12 years ago)
From
Changsu Choi at Seoul Nat U <changsu@astro.snu.ac.kr>
Myungshin Im and Changsu Choi (CEOU/Seoul National Univ.), on behalf of a
larger collaboration:
We observed GRB 131030A (Troja et al., GCN 15402) in B,R band using a 1-m
telescope at Mt. Lemmon Optical Observatory (LOAO) in Arizona, US.
The observation started at 2013-10-31 01:42:46 UT, or about 4.78 hours after
the BAT alert.
In all of the BR images, we identify the afterglow, with approximate
magnitudes B ~ 19.29 +/-0.07, R ~ 18.88 +/- 0.09 mag (first epoch),
calibrated against stars in vicinity based on USNO-B1 photometry.
We also confirm fading of the object from serial set of data we took about 4
and 6 hours later.
Further observations are planned.
We thank the LOAO operator, Jae-Hyuk Yoon and In-Kyung Baek for performing
the observation.
[GCN OPS NOTE(01nov13): This was delayed in distribution by 8 hours
because a new entry had to be added to the list.]
GCN Circular 15435
Subject
GRB 131030A: the 2nd epoch of SAO RAS observations
Date
2013-11-01T18:40:36Z (12 years ago)
From
Vladimir Sokolov at SAO RAS <sokolov@sao.ru>
A. S. Moskvitin and T. N. Sokolova
report on behalf of SAO RAS GRB follow-up team:
We observed the GRB 131030A field (Troja et al., GCN#15402)
on October, 31, with the 1-m telescope Zeiss-1000 of SAO RAS.
The weather conditions were good. The observations were
carried out in three bands: B, V, Rc.
We clearly detected the OT at the level R = 20.4 +/- 0.1.
T_start = 18:16:11 UT,
T_end = 21:59:15 UT,
T_mid - T0 = 24.059 hours.
The total Rc-band exposure was 3000 seconds.
The OT magnitude was calibrated against the same set of USNO B1 stars
(R2) as in GCN #15412 and not corrected for the Galaxy extinction.
GCN Circular 15436
Subject
GRB 131030A: Continued RATIR Optical and NIR Observations
Date
2013-11-01T19:26:33Z (12 years ago)
Edited On
2024-11-07T18:53:50Z (7 months ago)
From
Owen Littlejohns at Az State U <olittlej@asu.edu>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),
Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G.
Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC),
Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), José A. de
Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM),
Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey
Moseley (GSFC) report:
We again observed the field of GRB 131030A (Troja, et al., GCN 15402) with
the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on
the 1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional
on Sierra San Pedro Mártir from 2013/11 1.08 to 2013/11 1.20 UTC (29.01 to
31.91 hours after the BAT trigger), obtaining a total of 2.13 hours exposure
in the r and i bands and 0.88 hours exposure in the Z, Y, J, and H bands.
We continue to detect the uncatalogued source reported by UVOT (Troja et
al., GCN Circ. 15414), at fainter magnitudes than the first epoch of RATIR
observations (Littlejohns et al., GCN Circ. 15420). In comparison with the
SDSS DR9 and 2MASS, we obtain the following detections:
r 20.73 +/- 0.03
i 20.45 +/- 0.03
Z 20.19 +/- 0.05
Y 20.06 +/- 0.07
J 20.07 +/- 0.08
H 19.57 +/- 0.11
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. In comparison with the first epoch
of
RATIR observations these magnitudes can be modelled with power-law
decays, with indices of approximately t^-1.1 for the r and i bands, t^-1.0
for
the Z, Y and J bands and t^-0.8 for the H band.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 15444
Subject
GRB 131030A: Continued RATIR Optical and NIR Observations
Date
2013-11-04T20:01:34Z (12 years ago)
Edited On
2024-11-07T19:00:39Z (7 months ago)
From
Owen Littlejohns at Az State U <olittlej@asu.edu>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),
Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G.
Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC),
Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), José A. de Diego
(UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM), Carlos
Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC)
report:
We again observed the field of GRB 131030A (Troja, et al., GCN Circ. 15402)
with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org)
on the 1.5m Harold Johnson Telescope at the Observatorio Astronómico
Nacional
on Sierra San Pedro Mártir from 2013/11 4.10 to 2013/11 4.17 UTC (101.35
to 103.16 hours after the BAT trigger), obtaining a total of 1.04 hours
exposure in the r and i bands and 0.29 hours exposure in the Z, Y, J, and
H bands.
We continue to detect the uncatalogued source reported by UVOT (Troja et
al., GCN Circ. 15414) in the r, i and Z bands, at fainter magnitudes than
the previous epochs of RATIR observations (Littlejohns et al., GCN Circ.
15436; Littlejohns et al., GCN Circ. 15420). For a source within the
Swift-XRT error circle, in comparison with the SDSS DR9 and 2MASS, we
obtain the following detections and upper limits (3-sigma):
r 22.48 +/- 0.13
i 22.71 +/- 0.30
Z 21.70 +/- 0.34
Y > 21.28
J > 21.05
H > 20.49
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. In comparison with the second epoch
of RATIR observations the source has faded by an average of 1.8 magnitudes
in the r, i and Z bands. The upper limits all indicate that the source has
faded by a minimum of approximately 1 magnitude in the Y, J and H bands.
Our observations in the Z, Y, J and H bands are consistent with the
previously reported power-law decay indices (Littlejohns et al., GCN Circ.
15436), however, there is indication of a steeper decay in both the r and
i bands. Between this and the second epoch of RATIR observations we find
power-laws of t^-1.33 for the r band and t^-1.72 for the i band.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 15456
Subject
GRB 131030A: Swift-BAT refined analysis
Date
2013-11-05T16:32:59Z (12 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), E. Troja (NASA/GSFC/UMCP), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlinks,
we report further analysis of BAT GRB 131030A (trigger #576238)
(Troja, et al., GCN Circ. 15402). The BAT ground-calculated position is
RA, Dec = 345.074, -5.380 deg which is
RA(J2000) = 23h 00m 17.8s
Dec(J2000) = -05d 22' 46.4"
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 37%.
The mask-weighted light curve shows at least two overlapping peaks starting
at ~T-8 sec, peaking at ~T+10 sec, and ending at ~T+180 sec with a low-level
tail out to at least T+800 sec. T90 (15-350 keV) is 41.1 +- 4.0 sec
(estimated error including systematics).
The time-averaged spectrum from T-6.04 to T+143.37 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.30 +- 0.03. The fluence in the 15-150 keV band is 2.93 +- 0.04 x 10^-5 erg/cm2.
The 1-sec peak photon flux measured from T+6.40 sec in the 15-150 keV band
is 28.1 +- 0.7 ph/cm2/sec. All the quoted errors are at the 90% confidence
level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/576238/BA/
GCN Circular 15462
Subject
GRB 131030A: Continued RATIR Optical and NIR Observations
Date
2013-11-06T19:36:04Z (12 years ago)
Edited On
2024-11-07T18:53:36Z (7 months ago)
From
Owen Littlejohns at Az State U <olittlej@asu.edu>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),
Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G.
Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC),
Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), José A. de
Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM),
Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey
Moseley (GSFC) report:
We again observed the field of GRB 131030A (Troja, et al., GCN Circ.
15402) with the Reionization and Transients Infrared Camera (RATIR;
www.ratir.org) on the 1.5m Harold Johnson Telescope at the
Observatorio Astronómico Nacional on Sierra San Pedro Mártir from
2013/11 5.08 to 2013/11 5.34 UTC (124.95 to 131.33 hours after the
BAT trigger), obtaining a total of 4.24 hours exposure in the r and
i bands and 0.92 hours exposure in the Z, Y, J, and H bands.
We continue to detect the previously reported source in the r and i
bands (Littlejohns, et al., GCN Circ. 15420; Troja, et al., GCN Circ.
15402). For a source within the Swift-XRT error circle, in comparison
with the SDSS DR9 and 2MASS, we obtain the following detections and
upper limits (3-sigma):
r 23.17 +/- 0.14
i 22.73 +/- 0.14
Z > 22.82
Y > 22.35
J > 20.05
H > 19.38
A further epoch of observations was also conducted from 2013/11 6.09
to 2013/11 6.34 UTC (149.15 to 155.17 hours after the BAT trigger),
obtaining a total of 3.73 hours exposure in the r and i bands and 1.53
hours exposure in the Z, Y, J, and H bands. The source was detected in
the r and i bands once more. For a source within the Swift-XRT error
circle, in comparison with the SDSS DR9 and 2MASS, we obtain the
following detections and upper limits (3-sigma):
r 23.41 +/- 0.18
i 23.06 +/- 0.18
Z > 22.74
Y > 22.25
J > 21.97
H > 21.39
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. In comparison with previous
epochs of RATIR observations, the source continues to fade in both the
r and i band.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 15463
Subject
GRB 131030A: RATIR Optical and NIR Upper Limits
Date
2013-11-07T21:36:11Z (12 years ago)
Edited On
2024-11-07T19:56:33Z (7 months ago)
From
Owen Littlejohns at Az State U <olittlej@asu.edu>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),
Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G.
Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC),
Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), José A. de
Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM),
Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey
Moseley (GSFC) report:
We again observed the field of GRB 131030A (Troja, et al., GCN
Circ. 15402) with the Reionization and Transients Infrared Camera
(RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the
Observatorio Astronómico Nacional on Sierra San Pedro Mártir from
2013/11 7.09 to 2013/11 7.33 UTC (173.34 to 178.87 hours after the
BAT trigger), obtaining a total of 3.40 hours exposure in the r
and i bands and 1.41 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle, in comparison
with the SDSS DR9 and 2MASS, we obtain the following upper limits
(3-sigma):
r > 23.52
i > 23.11
Z > 22.69
Y > 22.17
J > 21.87
H > 21.35
These magnitudes are in the AB system and are not corrected for
Galactic extinction in the direction of the GRB. The upper limits
obtained in the r and i bands are consistent with the reported
decay from previous epochs of RATIR observations (Littlejohns, et
al., GCN Circ. 15462).
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
[GCN OPS NOTE(07nov13): Per operator's desire, I removed some email header detritus.]
GCN Circular 15481
Subject
GRB 131030A: MITSuME Akeno Optical observation
Date
2013-11-11T06:15:29Z (12 years ago)
From
Taketoshi Yoshii at Tokyo Tech <yoshii.t.ac@m.titech.ac.jp>
T.Tanigawa, T. Yoshii, K. Ito, Y. Saito, Y. Yano, R. Usui, Y. Tachibana,
S. Kurita, Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:
We observed the field of GRB 131030A (E. Troja et al., GCN Circular #15402) with the
optical three color (g, Rc, and Ic) CCD cameras attached to the MITSuME 50 cm
telescope of Akeno Observatory, Yamanashi, Japan.
The observation started on 2013-10-31 09:37:51 UT ( 12.68h after the burst).
We detected the previously reported optical afterglow of GRB131013A (E. Troja et al., GCN Circular #15402) in the Rc and Ic band.
The measured magnitudes were listed below.
T0+[sec] MID-UT T-EXP[sec] g' Rc Ic
-------------------------------------------------------------------------------------------------------------------------------------
43334 10:45:52 2940 >19.92 19.37+/-0.31 18.94+/-0.27
49357 12:14:44 5760 >20.72 20.05+/-0.30 19.25+/-0.24
57097 14:23:40 3780 >20.38 19.57+/-0.22 >19.51
-------------------------------------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst [sec]
T-EXP: Total Exposure time [sec]
We used GSC2.3 catalog for flux calibration.
GCN Circular 15501
Subject
GRB 131030A, Optical Observations
Date
2013-11-18T11:03:11Z (12 years ago)
From
Shashi Bhushan Pandey at ROTSE <shaship@umich.edu>
S. B. Pandey, Brajesh Kumar and Y. C. Joshi (ARIES Nainital
India, on behalf of larger Indian GRB collaboration)
We observed the Swift GRB 131030A field ( (Troja et al., GCN#15402) using
1.3m DFOT telescope at Devasthal, operated by ARIES Nainital, India. The
observations were started at 16:25:47 UT on 2013-10-31. Two frames in
each R_c and I_c bands with an exposure time of 300s each were obtained
in good seeing conditions.
In our individual frames, we clearly detect the optical counterpart of
GRB 131030A (GNC circular 15403, 15405, 14506, 15410). The
preliminary photometry of co-added R_c (300sec x 2) and
I_c (300sec x 2) frames yields following.
.................................................................
Time (MID-UT) Exp (sec) Filter Magnitude
.................................................................
2013-10-31, 16:46:39 600 R_c 20.13 +/- 0.04
2013-10-31, 16:33:09 600 I_c 19.49 +/- 0.06
..................................................................
The photometry was performed in comparison to nearby USNO- B1
stars. This message may be cited.