GRB 111210A
GCN Circular 12650
Subject
GRB 111210A: Swift detection of a burst
Date
2011-12-10T14:49:33Z (14 years ago)
From
David Palmer at LANL <palmer@lanl.gov>
M. H. Siegel (PSU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU), V. D'Elia (ASDC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), A. Y. Lien (NASA/GSFC/ORAU),
C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC),
A. Melandri (INAF-OAB), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU),
E. Troja (NASA/GSFC/ORAU) and B.-B. Zhang (PSU) report on behalf of
the Swift Team:
At 14:37:03 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 111210A (trigger=509419). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 191.488, -7.167 which is
RA(J2000) = 12h 45m 57s
Dec(J2000) = -07d 10' 01"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a double-peaked
structure with a duration of about 2.5 sec. The peak count rate
was ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 14:38:04.0 UT, 60.8 seconds after
the BAT trigger. Using promptly downlinked data we find an uncatalogued
X-ray source located at RA, Dec 191.47507, -7.16565 which is equivalent
to:
RA(J2000) = 12h 45m 54.02s
Dec(J2000) = -07d 09' 56.3"
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This
location is 46 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. We
cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event
data gives a column density consistent with the Galactic value of 1.92
x 10^20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 150 seconds with the White
filter starting 64 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. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.03.
Burst Advocate for this burst is M. H. Siegel (siegel AT astro.psu.edu).
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 12651
Subject
GRB 111210A: Swift-BAT refined analysis
Date
2011-12-10T18:48:50Z (14 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),
M. H. Siegel (PSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-61 to T+178 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 111210A (trigger #509419)
(Siegel, et al., GCN Circ. 12650). The BAT ground-calculated position is
RA, Dec = 191.493, -7.173 deg, which is
RA(J2000) = 12h 45m 58.3s
Dec(J2000) = -07d 10' 21.8"
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
The mask-weighted light curve shows two peaks; the first starting at ~T-2.3 sec
and ending at ~T-1.6 sec, and the second starting at ~T-0.2 sec, peaking
at ~T+0.1 sec, and ending at ~T+0.4 sec. T90 (15-350 keV) is 2.52 +- 0.13 sec
(estimated error including systematics).
The time-averaged spectrum from T-2.33 to T+0.36 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.30 +- 0.19. The fluence in the 15-150 keV band is 1.6 +- 0.2 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-2.33 sec in the 15-150 keV band
is 1.0 +- 0.1 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/509419/BA/
GCN Circular 12652
Subject
GRB 111210A: Enhanced Swift-XRT position
Date
2011-12-10T20:11:21Z (14 years ago)
From
Phil Evans at U of Leicester <pae9@star.le.ac.uk>
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester)
report on behalf of the Swift-XRT team.
Using 1316 s of XRT Photon Counting mode data and 1 UVOT
images for GRB 111210A, 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 = 191.47684, -7.16593 which is equivalent
to:
RA (J2000): 12h 45m 54.44s
Dec (J2000): -07d 09' 57.4"
with an uncertainty of 2.1 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 12653
Subject
GRB 111210A: Spectral lag analysis
Date
2011-12-10T21:06:33Z (14 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), J. Norris (BSU) for the BAT Team:
We report the spectral lag analysis for GRB 111210A (GCN Circ. 12632 & 12640)
based on the BAT data. Using 16-ms binned light curves, the spectral lag
for the 15-25 keV to 50-100 keV bands is 38 +26/-33 msec, and 36 +16/-18 msec
for the 25-50 keV to 100-350 keV bands for both peaks combined. For just
the second peak, the lag for 15-25 keV to 50-100 keV bands is 97 +52/-40 msec.
These lag values place this burst in the long burst category.
GCN Circular 12654
Subject
GRB 111210A: Swift/UVOT Upper Limits
Date
2011-12-10T22:03:51Z (14 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111210A
65 s after the BAT trigger (Siegel et al., GCN Circ. 12650).
No optical afterglow consistent with the XRT position (Goad et al.,
GCN Circ. 12652) 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) 65 214 147 >20.3
u (FC) 276 526 246 >19.5
white 65 6160 569 >20.5
v 606 6570 471 >19.3
b 532 7315 397 >20.0
u 276 7185 659 >19.9
uvw1 657 6980 471 >20.1
uvm2 1062 1082 19 >18.1
uvw2 582 6365 216 >20.5
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).
GCN Circular 12655
Subject
GRB111210A: MITSuME Okayama J-band upper-limit
Date
2011-12-10T22:48:20Z (14 years ago)
From
Kenshi Yanagisawa at OAO/NAOJ <yanagi@oao.nao.ac.jp>
Kenshi Yanagisawa, Daisuke Kuroda, Yasuhiro Shimizu, Kiichi Okita
(OAO/NAOJ), Michitoshi Yoshida (Hiroshima-U), Kouji Ohta(Kyoto-U),
and Nobuyuki Kawai(Tokyo Tech.) report on behalf of the MITSuME
collaboration:
We observed the field of GRB111210A (Siegel et al, GCN12650, Stamatikos
et al, GCN12651) in J-band with a wide-field NIR camera at Okayama
Astrophysical Observatory (Japan). The camera has an effective aperture
of 0.91m.
Observations started from 17:59 UT on 10th December, 3.37 hours after
the BAT trigger, to 19:35 UT. The total exposure of 73 min was
successfully obtained.
In our co-add image, we did not find any new point source within the
enhanced XRT error circle (Goad et al., GCNC 12652) down to limiting
magnitude of J=16.0 (Vega, S/N=10). The photometric calibration was
made against 2MASS field stars.
T0+[s] MID-UT T-EXP[sec] J
---------------------------------------------------
+15,000 18:47 4,380 >16.0(S/N=10)
---------------------------------------------------
T0+ : Elapsed time after the burst [sec]
T-EXP: Total Exposure time [sec]
GCN Circular 12657
Subject
GRB 111210A: Gemini-North candidate counterpart
Date
2011-12-11T00:42:50Z (14 years ago)
From
Nial Tanvir at U.Leicester <nrt3@star.le.ac.uk>
N. R. Tanvir (U. Leicester) and A. J. Levan (U. Warwick) report on
behalf of a larger collaboration:
We obtained short exposures of the field of GRB 111210A (Siegel et
al. GCN 12650) with Gemini-North using the GMOS instrument,
beginning at 2011-Dec-10 15:16UT, approximately 39 minutes post-burst.��
Within the refined XRT position (Goad et al. GCN12652) we find a faint
source which is visible in both z and r filters.�� Calibrated against nearby
USNO stars we find a magnitude of r~23, with an estimated error
of +/-0.2 random and +/-0.3 calibration.
Our astrometry gives a position (conservative uncertainty of 0.5 arcsec) of:
RA(2000)= 12 45 54.40
dec(2000)= -07 09 57.4
We thank the Gemini staff, particularly Kristin Chiboucas and
Rachel Mason, for assistance with these observations.
GCN Circular 12659
Subject
GRB 111210A: MITSuME Okayama Optical upper limits
Date
2011-12-11T02:24:18Z (14 years ago)
From
Daisuke Kuroda at OAO/NAOJ <dikuroda@oao.nao.ac.jp>
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),
S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)
and N. Kawai(Tokyo Tech)
report on behalf of the MITSuME collaboration:
We observed the field of GRB 111123A (Siegel et al., GCNC 12650)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2011-12-10 17:54:08 UT (~3.3 h after
the burst). We did not find any new point source within the enhanced
XRT circle (Goad, et al., GCNC 12652) in all the three bands.
Three sigma upper limits of the OT are listed below. We used
SDSS catalog for flux calibration.
T0+[day] MID-UT T-EXP[sec] g' Rc Ic
------------------------------------------------------
0.17952 18:55:34 5640.0 >18.9 >19.3 >18.9
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
GCN Circular 12660
Subject
GRB 111210A: Swift-XRT refined Analysis
Date
2011-12-11T02:49:02Z (14 years ago)
From
Phil Evans at U of Leicester <pae9@star.le.ac.uk>
D.N. Burrows (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U.
Leicester), P.A. Evans (U. Leicester), V. Mangano (INAF-IASFPA), A.
Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU),
M.C. Stroh (PSU) and M.H. Siegel report on behalf of the Swift-XRT
team:
We have analysed 6.8 ks of XRT data for GRB 111210A (Siegel et al. GCN
Circ. 12650), from 69 s to 30.5 ks after the BAT trigger. The data are
entirely in Photon Counting (PC) mode. The enhanced XRT position for
this burst was given by Goad et al. (GCN. Circ 12652).
The light curve can be modelled with a power-law decay with a decay
index of alpha=3.7 (+/-0.4).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 1.6 (+0.6, -0.3). The
best-fitting absorption column is consistent with the Galactic value
of 1.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed
(unabsorbed) 0.3-10 keV flux conversion factor deduced from this
spectrum is 4.7 x 10^-11 (4.9 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 0 (+1.1, -0) x 10^21 cm^-2
Galactic foreground: 1.9 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index: 1.6 (+0.6, -0.3)
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00509419.
This circular is an official product of the Swift-XRT team.
GCN Circular 12661
Subject
GRB 111210A: SDSS prior imaging
Date
2011-12-11T11:58:43Z (14 years ago)
From
Nial Tanvir at U.Leicester <nrt3@star.le.ac.uk>
N. R. Tanvir (U. Leicester) and D. Malesani (DARK) report:
We have analysed images of the field of GRB 111210A available in SDSS
DR8.�� The source detected in the Gemini imaging (Tanvir et al. GCN
12657) is also visible at low S/N in the gri and z filter images.�� Our
photometry gives magnitudes g=23.9, r=23.0, i=22.9 and z=23.0, with
errors around 0.3 mag in each case.�� Since these are consistent with
the Gemini magnitudes, this suggests that the source is a candidate
host galaxy, with little if any afterglow contributing to the Gemini images.
The detection in the g-band, and indeed its brightness, mean this
source is likely to be at redshift z<4.
GCN Circular 12662
Subject
GRB 111210A: GROND observations
Date
2011-12-11T12:31:25Z (14 years ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
D. A. Kann, S. Klose (TLS Tautenburg), and J. Greiner, (MPE Garching)
report on behalf of the GROND team:
We observed the field of the Swift GRB 111210A (Swift trigger 509419;
Siegel et al., GCN #12650) simultaneously in g'r'i'z'JHK with GROND
(Greiner et al. 2008, PASP, 120, 405) mounted at the 2.2 m ESO/MPG
telescope at La Silla Observatory (Chile). Observations started on
December 11, 2011, at 08:06 UT, 0.73 days after the GRB trigger, during
morning twilight and were partially performed only in the NIR. They were
taken at an average seeing of 1".1 and at an airmass of 2 to 1.5.
At the position of the X-ray afterglow (Goad et al., GCN #12652) as well
as the optical candidate (Tanvir et al., GCN #12657), we tentatively
detect a source in the redder filters.
Based on co-added images of 743 s integration time in g'r'i'z' (centered
0.7396 days after the trigger) and 2160 s in JHK (centered 0.7520 days
after the trigger), the following magnitudes and limits (3 sigma, AB
magnitude system) have been derived:
g' > 22.6,
r' > 23.2,
i' = 22.8 +/- 0.4,
z' = 22.4 +/- 0.3,
J = 21.4 +/ 0.3,
H = 21.4 +/- 0.4,
K > 20.5.
Our r'-band upper limit is not deep enough to check fading against the
Gemini North candidate. If the faint detections actually represents a real
object, this is likely the host galaxy of this GRB (Tanvir & Malesani, GCN
12661).
Magnitudes were calibrated against the SDSS catalog in g'r'i'z' and 2MASS
field stars in JHK.
GCN Circular 12665
Subject
GRB 111210A: Xinglong TNT upper limit
Date
2011-12-12T04:04:48Z (14 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
L.P. Xin, J.Y. Wei, Y. L. Qiu, J. Wang, J.S. Deng,
C. Wu, X. H. Han on behalf of EAFON report:
We began to observe GRB 111210A (Siegel et al., GCN 12650)
with Xinglong TNT telescope at 21:16:27 (UT), about 6.67 h after
the burst. 14 R-band images were obtained.
No new source was detected in the combined R band image within
the errorbox of XRT position. The upper limit was estimated
to be about 19.5 mag derived from USNO B1.0 R2 mag.
This message may be cited.
For more information about Xinglong GRBs Follow-up
observations, please visit the website:
http://www.xinglong-naoc.org:8080/grb/index.html"
GCN Circular 12713
Subject
GRB 111210A: optical upper limit of Mt. Terskol observatory
Date
2011-12-22T14:48:58Z (13 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
A.Volnova (SAI MSU), M. Andreev, A. Sergeev �(Terskol Branch of INASAN), V.
Petkov (Baksan Neutrino Observatory of INR), N. Karpov, O. Andrienko, K.
Martynyuk-Lototsky, N. Parakhin, N. Borachok, V. Kozlov, G. Butenko, V.
Godunova (IC AMER, NASU), A. Pozanenko (IKI) report:
We observed the field of GRB 111210A (Siegel et al., GCN 12650) with
Zeiss-600 telescope of Mt.Terskol observatory on Dec 11 between
01:06:25 and 03:09:45 UT under poor weather condition and mean seeing
of about 2.2". We took 120 frames in R-band with exposure of 60
seconds. In a stacked frame we did not detect any source within the
enhanced XRT error circle (Goad et al., GCN 12652). The photometry of
the field is based on a few stars from USNO-B1.0 catalogue.
t-t0 � � � � � � � filter � exp. � � � �OT � �uplim (3sigma)
(mid., days) � � � � � �(s)
0.48006 � � � � R � � �120x60 � �n/d � � 18.6