GRB 131127A
GCN Circular 15570
Subject
GRB 131127A: optically dark burst
Date
2013-12-03T16:26:09Z (13 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
A.Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), A.
Pozanenko(IKI) report on behalf of larger GRB follow-up collaboration:
We report about revised photometry of the GRB 131127A (Markwardt et
al., GCN 15516) published earlier (Klunko et al., GCN 15519).
Using combined image of full data set of the observations on Nov. 27
we do not detect any optical counterpart in the enhanced XRT error
circle (Evans et al., GCN 15520). The details of the photometry are
the following:
UT start t-T0 Filter Exp. OT UL
(mid, days) (s) (3 sigma)
10:40:06 0.04680 R 4650 n/d 22.5
The photometry is based on the same 3 USNO-B1.0 stars listed in the GCN 15519.
The deep upper limit obtained at ~67 min (mid time) after burst
trigger together with Swift/XRT observations
(www.swift.ac.uk/xrt_curves/00579571/flux.qdp) suggests the upper
limit of optical-to-X-ray spectral slope beta_OX = -0.02 and classify
the GRB 131127A as a dark burst according to Jakobsson (Jakobsson et
al., 2004, ApJ, 614, L21).
GCN Circular 15555
Subject
GRB 131127A: RATIR Rejection of High-z Candidate
Date
2013-11-29T20:57:31Z (13 years ago)
Edited On
2024-11-07T18:58:36Z (2 years ago)
From
Nat Butler at UC berkeley <natxbutler@gmail.com>
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>
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), Owen Littlejohns (ASU), 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 131127A (Markwardt, et al., GCN 15516)
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 29.09 to 2013/11 29.17 UTC
(40.06 to 41.98 hours after the BAT trigger), obtaining a total of 1.42
hours exposure in the r and i bands and 0.60 hours exposure in the Z, Y, J,
and H bands.
For the red source 3.3" away from the center of the XRT positions (Butler
et al., GCN 15525), in comparison with 2MASS, we obtain:
r > 23.78
i = 22.68 +/- 0.16 (0.20 +/- 0.19)
Z = 22.02 +/- 0.26 (0.17 +/- 0.31)
Y = 21.31 +/- 0.24 (0.09 +/- 0.28)
J = 21.26 +/- 0.29 (0.23 +/- 0.32)
H = 20.55 +/- 0.24 (-0.33 +/- 0.31)
The change in magnitude relative to the observations on the previous night
are given in the parentheses. There is slight (~<1-sigma) evidence for a
fade in most bands, but the shallowness ~t^(-0.2) of the fade is not
expected for a GRB afterglow. We conclude, as did Im et al. (GCN 15548),
that this source is not the afterglow of GRB 131127A.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 15548
Subject
GRB 131127A: CQUEAN riz Observation
Date
2013-11-29T14:43:29Z (13 years ago)
From
Myungshin Im at Seoul Nat U <mim@astro.snu.ac.kr>
Myungshin Im, Changsu Choi (CEOU/SNU), Hyein Lee, Huynh Ahn N. Le,
and Soojong Pak (Kyunghee Univ.)
We observed the field of GRB 131127A (Markwardt et al. GCN 15516),
using CQEUAN (Park et al. 2012) on the 2.1-m Otto-Struve telescope
at the McDonald Observatory in Texas, US. The observation started
at 2013-11-29 01:31:43 UT, or about 1.63 days after the BAT alert.
A series of images were taken in r, i, and z-band for about 45 min.
We identify the red source reported in Butler et al. (GCN 15525), but
no significant fading of the source was found with z = 21.90 +- 0.15 AB mag,
consistent with Z = 21.85 +- 0.16 mag from Butler et al. (GCN 15525).
This suggests that the red source may not be the GRB afterglow,
or the light curve is changing very slowly.
GCN Circular 15532
Subject
GRB 131127A: Bassano Bresciano Observatory optical upper limit
Date
2013-11-28T15:00:35Z (13 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 131127A detected
by SWIFT(trigger 00579571) with the robotic
telescope of (IAU station 565) Bassano Bresciano
Observatory, Italy (www.osservatoriobassano.org).
The observations started 9h 2m. after the
GRB trigger,with our schmidt telescope
D=320/400 mm F/D=3.1.
Weather conditions were good.
We co-added a series of 5 exposures of 120 sec each.
We did not found any optical counterpart
in the error box of the XRTcandidate
(Markwardt et al., GCN 15516).
Start End R.lim
542min 554min 18.5
Magnitudes were estimated with the USNO-B1 cat.
and are not corrected for galactic dust extinction.
The message may be cited.
GCN Circular 15527
Subject
GRB 131127A: Swift/UVOT Upper Limits
Date
2013-11-28T11:56:24Z (13 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and C. B. Markwardt (NASA/GSFC) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131127A
102 s after the BAT trigger (Markwardt et al., GCN Circ. 15516).
No optical afterglow consistent with the XRT position (Evans et al. GCN
Circ. 15520) nor the RATIR position (Butler et al. GCN Circ. 15525) is
detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding
chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 102 252 147 >21.4
u_FC 315 565 246 >20.6
white 102 6711 746 >22.3
v 645 7024 373 >20.3
b 571 6506 452 >21.2
u 315 6300 678 >21.1
w1 694 6095 432 >20.6
m2 669 5890 269 >20.1
w2 621 6916 471 >20.9
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.14 in the direction of the
burst (Schlegel et al. 1998).
GCN Circular 15526
Subject
GRB 131127A: AROMA-N Optical Observation
Date
2013-11-28T11:36:56Z (13 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
D. Kawamura, T. Sakamoto, I. Takahashi, S. Sugai, A. Yoshida (AGU)
We observed the field of GRB 131127A detected by Swift (trigger #579571;
Markwardt et al., GCN Circ. 15516) with the 12-inch AGU Robotic Optical
Monitor for Astrophysical object - Narrow (AROMA-N) located at the Sagamihara
campus of Aoyama Gakuin University.
60 images of 60 sec exposures were taken in the R filter starting from
November 27 10:42:18 (UT) about 30 minutes after the trigger and
stopped on November 27 11:48:15 (UT). We do not detect the optical
afterglow both in the individual images and the stacked image, which
combined 57 good quality images, inside the enhanced XRT position
(Evans, et al., GCN #15520). The estimated five sigma upper limit of
the combined image (total exposure of 3420 sec) is ~16.6 mag using
the USNO-B1 catalog.
[GCN OPS NOTE(29nov13): Per author's request, the "November 11" date
was changed to "November 27" in two places.]
GCN Circular 15525
Subject
GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
Date
2013-11-28T08:41:53Z (13 years ago)
Edited On
2024-11-07T19:48:22Z (2 years ago)
From
Nat Butler at Az State U <natbutler@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>
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), Owen Littlejohns (ASU), 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 131127A (Markwardt, et al., GCN 15516) 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 28.11 to 2013/11 28.26 UTC (16.42
to 19.94 hours after the BAT trigger), obtaining a total of 2.49 hours
exposure in the r and i bands and 1.04 hours exposure in the Z, Y, J, and H
bands.
We do not detect any sources within the Enhanced Swift-XRT error circle
(Evans et al., GCN 15520), in comparison with 2MASS, we obtain the
following upper limits (3-sigma):
r > 24.19
i > 23.53
Z > 22.78
Y > 22.16
J > 22.04
H > 21.48
However, we do detect a red source just outside (3.3" away from the center)
of the XRT position, at a position RA, DEC = 332.731227 , 36.609171 (J2000,
+/- 0.5"). We measure:
r = 24.21 +/- 0.35
i = 22.48 +/- 0.11
Z = 21.85 +/- 0.16
Y = 21.22 +/- 0.15
J = 21.03 +/- 0.14
H = 20.88 +/- 0.20
The faint flux in r band relative to the redder bands could be due to IGM
attenuation at high redshift, z ~ 5. We cannot confirm fading of this
source. Further observations of this source are encouraged.
The magnitudes above are in the AB system and are not corrected for
Galactic extinction, E[B-V]~0.1, in the direction of the GRB.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 15523
Subject
GRB 131127A: Swift-XRT refined Analysis
Date
2013-11-27T22:33:03Z (13 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), B.P. Gompertz
(U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), B.
Sbarufatti (INAF-OAB/PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A.
Kennea (PSU) and C.B. Markwardt report on behalf of the Swift-XRT team:
We have analysed 6.5 ks of XRT data for GRB 131127A (Markwardt et al.
GCN Circ. 15516), from 84 s to 24.3 ks after the BAT trigger. The
data comprise 62 s in Windowed Timing (WT) mode (the first 8 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 15520).
The late-time light curve (from T0+4.5 ks) can be modelled with a
power-law decay with a decay index of alpha=1.55 (+0.26, -0.22).
A spectrum formed from the WT mode data can be fitted with an absorbed
power-law with a photon spectral index of 3.8 (+0.4, -0.3). The
best-fitting absorption column is 3.9 (+0.7, -0.6) x 10^21 cm^-2, in
excess of the Galactic value of 1.2 x 10^21 cm^-2 (Kalberla et al.
2005). The PC mode spectrum has a photon index of 2.22 (+/-0.15) and a
best-fitting absorption column of 2.5 (+0.5, -0.4) x 10^21 cm^-2. The
counts to observed (unabsorbed) 0.3-10 keV flux conversion factor
deduced from this spectrum is 3.6 x 10^-11 (6.1 x 10^-11) erg cm^-2
count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 2.5 (+0.5, -0.4) x 10^21 cm^-2
Galactic foreground: 1.2 x 10^21 cm^-2
Excess significance: 5.1 sigma
Photon index: 2.22 (+/-0.15)
If the light curve continues to decay with a power-law decay index of
1.55, the count rate at T+24 hours will be 2.3 x 10^-3 count s^-1,
corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.0 x
10^-14 (1.4 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00579571.
This circular is an official product of the Swift-XRT team.
GCN Circular 15522
Subject
GRB 131127A. 1.5m OSN optical limit
Date
2013-11-27T22:24:50Z (13 years ago)
From
Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct@iaa.es>
A. Sota, J. Gorosabel and A. J. Castro-Tirado (IAA-CSIC Granada) on behalf
of a larger collaboration, report:
"Following the detection of GRB 131127A by Swift (Markwardt et al. GCNC
15516), we have conducted I-band observations with the 1.5m OSN telescope at
Observatorio de Sierra Nevada (Granada, Spain), starting on 27 Nov 18:26
UT,(i.e. 8.2-hr post burst). A stack of 17 x 300s images shows nothing at
the enhanced Swift/XRT position (Evans et al. GCNC 15520) down to I = 21".
GCN Circular 15521
Subject
GRB 131127A, Swift-BAT refined analysis
Date
2013-11-27T20:49:44Z (13 years ago)
From
Craig Markwardt at NASA/GSFC <craigm@milkyway.gsfc.nasa.gov>
C. B. Markwardt (GSFC), 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),
D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU),
J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-240 to T+960 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 131127A (trigger
#579571) (Markwardt, et al., GCN Circ. 15516). The BAT
ground-calculated position is
RA, Dec = 332.714, 36.596 deg which is
RA(J2000) = 22h 10m 51.3s
Dec(J2000) = +36d 35' 46.9"
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 39%.
The mask-weighted light curve has multiple peaks. The first set of
about 3 peaks occurs before the initial trigger between T-60 and T-38
sec. The main set of about 7-8 peaks occurs between T-5 and T+40 sec.
The peak emission occurs at about T+0 sec. T90 (15-350 keV) is 92.1 +-
10.2 sec (estimated error including systematics).
The time-averaged spectrum from T-59.4 to T+37.5 sec is best fit by a
simple power-law model. The power law index of the time-averaged
spectrum is 2.34 +- 0.16. The fluence in the 15-150 keV band is 1.9 +-
0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.54
sec in the 15-150 keV band is 1.3 +- 0.2 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/579571/BA/
GCN Circular 15520
Subject
GRB 131127A: Enhanced Swift-XRT position
Date
2013-11-27T20:23:42Z (13 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 3638 s of XRT Photon Counting mode data and 7 UVOT
images for GRB 131127A, 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 = 332.73008, +36.60929 which is equivalent
to:
RA (J2000): 22h 10m 55.22s
Dec (J2000): +36d 36' 33.5"
with an uncertainty of 1.7 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 15519
Subject
GRB 131127A: Mondy optical upper limit
Date
2013-11-27T13:18:01Z (13 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
E. Klunko (ISTP), A.Volnova (IKI), M. Eselevich (ISTP), A. Pozanenko(IKI)
report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 131127A (Markwardt et al., GCN
15516) with AZT-33IK telescope of Sayan observatory (Mondy) starting Nov.,
27 (UT) 10:40:06. We obtained several images in R-filter with exposure of
30 and 60 seconds. Within the XRT circle (Markwardt et al., GCN 15516) we
did not detect any optical object.
The details of the photometry are the following:
UT start, t-T0 Filter Exp. OT UL
(mid, days) (s) (3 sigma)
10:40:06 0.02839 R 7*30+21*60 n/d 21.3
The photometry is based on 3 USNO-B1.0 stars:
USNO-B id RA Dec R2
1265-0518495 22:11:06.80 +36:35:45.6 16.06
1265-0518432 22:10:59.37 +36:35:56.7 16.45
1266-0522367 22:10:48.55 +36:36:43.7 15.45
GCN Circular 15518
Subject
GRB 131127A: Nanshan optical upper limit
Date
2013-11-27T12:33:21Z (13 years ago)
From
Dong Xu at DARK/NBI <dong.dark@gmail.com>
D. Xu (DARK/NBI), J.-Z. Liu, G.-J. Feng, H.-B. Niu, C.-H. Bai, A.
Esamdin, L. Ma (XAO) report:
We observed the field of GRB 131127A (Markwardt et al., GCN 15516)
using 1m telescope located on Mt. Nanshan, Xinjiang, China.
Observations started at 11:45:12 UT on 2013-11-27 (i.e., 1.56 hr after
the BAT trigger) and a series of R-band frames were obtained.
Within the SPER XRT error circle (http://www.swift.ac.uk/sper/) of
this burst, no crediable optical source is detected down to a limiting
magnitude of R=20.5 mag, calibrated with nearby USNO B1 field.
GCN Circular 15517
Subject
GRB 131127A: MASTER-NET optical observations
Date
2013-11-27T10:38:24Z (13 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina,
N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov,
D.Denisenko, A.Sankovich
Sternberg Astronomical Institute, Moscow State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinsky, I.Zalozhnih, A. Popov
Ural Federal University, Yekaterinburg, Kourovka
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka was pointed to the GRB131127A 503 sec after GRB time and
40 sec after notice time at 2013-11-27 10:19:58 UT in two polarizations.
On our first (100s exposure) set we haven`t found optical transient
within SWIFT error-box (ra=22 11 00 dec=+36 35 24 r=0.050000).
The 5-sigma upper limit has been about 17.5 mag
The message may be cited.
GCN Circular 15516
Subject
GRB 131127A: Swift detection of a burst
Date
2013-11-27T10:33:41Z (13 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@milkyway.gsfc.nasa.gov>
C. B. Markwardt (NASA/GSFC), S. D. Barthelmy (GSFC),
S. B. Cenko (GSFC), V. D'Elia (ASDC), D. Malesani (DARK/NBI),
F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),
D. M. Palmer (LANL) and P. Romano (INAF-IASFPA) report on behalf of
the Swift Team:
At 10:11:35 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 131127A (trigger=579571). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 332.751, +36.590 which is
RA(J2000) = 22h 11m 00s
Dec(J2000) = +36d 35' 24"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows several overlapping
peaks with a duration of about 50 sec. The peak count rate
was ~1600 counts/sec (15-350 keV), at 0 sec after the trigger.
The XRT began observing the field at 10:13:09.3 UT, 93.8 seconds after
the BAT trigger. Using promptly downlinked data we find a bright,
fading, uncatalogued X-ray source with an enhanced position: RA, Dec
332.7293, 36.6098 which is equivalent to:
RA(J2000) = 22h 10m 55.03s
Dec(J2000) = +36d 36' 35.2"
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This
location is 94 arcseconds from the BAT onboard position, within the BAT
error circle. This position may be improved as more data are received;
the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event
data gives a column density consistent with the Galactic value of 1.15
x 10^21 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 1.33e-09 erg cm^-2 s^-1 (0.2-10
keV).
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 102 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
Data from the list of sources generated on-board are not available at this
time. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.14.
Burst Advocate for this burst is C. B. Markwardt (Craig.Markwardt 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.)