GRB 051210
GCN Circular 4331
Subject
GRB 051210: Swift/UVOT upper limits
Date
2005-12-12T01:34:05Z (21 years ago)
From
Alexander Blustin at MSSL-UCL <ajb@mssl.ucl.ac.uk>
A. J. Blustin (UCL-MSSL), V. Mangano (INAF-IASS), W. Voges (MPE),
F. Marshall (GSFC), N. Gehrels (GSFC) on behalf of the Swift/UVOT
team report:
The Swift/UVOT began observing the field of GRB 051210 at 05:47:43
UT on 2005-12-10, 70 s after the BAT trigger (Mangano et al., GCN
4315). No source was observed in any of the UVOT filters at the
refined XRT position (Mangano et al., GCN 4320) or at the position
of the Magellan source (Bloom et al. GCN 4330). 3-sigma upper limits
in summed images from each of the filters are listed below (not
corrected for extinction; E(B-V) = 0.019).
Filter T_range(s) Exp(s) 3sigUL(mag)
V 70-76498 3721 20.6
B 450-74933 4954 21.7
U 395-70715 4276 21.2
W1 341-81624 4338 21.7
M2 287-80716 4377 22.1
W2 558-75839 4005 22.3
White 503-931 100 19.9
GCN Circular 4330
Subject
GRB 051210: Magellan Imaging
Date
2005-12-12T00:42:27Z (21 years ago)
From
Josh Bloom at UC Berkeley <jbloom@astron.berkeley.edu>
J. S. Bloom (UC Berkeley), M. Modjaz (CfA/Harvard), P. Challis
(CfA/Harvard), R. P. Kirshner (CfA/Harvard), W.-W. Chen (Chicago),
J. X. Prochaska (UCO/Lick) report:
Starting 11 Dec 2005 01:10:41 UTC, we observed the field of the short
burst GRB 051210 (Mangano et al. 4315, 4320; Sato et al. 4318) with
the 6.5m Clay/Magellan using the LDSS3 instrument (*). In a stack of
2x10min exposures in r'-band, we find one clearly detected source
consistent the revised (GCN 4320) error circle. The J2000 coordinates
of this source is:
RA = 22:00:40.93
DEC = -57:36:47.1
We make no claim of variability at this time, and note that the
source appears somewhat extended (north by north east). In addition
there appears to be a marginally detected source at (end figures) 41.41,
47.0. Follow-up is encouraged."
A finding chart may be found at:
http://astro.berkeley.edu/~jbloom/grb051210_find.pdf
(red diamonds are USNO B1.0 positions)
This message may be cited.
(*) http://www.ociw.edu/lco/magellan/instruments/LDSS3/
GCN Circular 4323
Subject
GRB 051210: Optical imaging from Las Campanas
Date
2005-12-11T02:13:57Z (21 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (Carnegie Observatories) and A. Boss (Carnegie DTM) reoprt:
"We imaged the error circle of GRB 051210 (GCNs 4318, 4320) with the du
Pont 100-inch telescope at Las Campanas Observatory in I-band for a total
of 30 min starting on 2005 December 11.04 UT (19.2 hours after the burst).
The images were obtained at an airmass of about 1.4 and an average seeing
of about 0.8". We do not detect any objects within the XRT error circle
to an estimated 5-sigma limit of I>23 mag."
GCN Circular 4322
Subject
GRB 051210: SALT detection limit
Date
2005-12-10T21:52:31Z (21 years ago)
From
Martin Still at NASA/GSFC Swift SSC <Martin.Still@gsfc.nasa.gov>
M. Still, A. Kniazev, S. Siyengo (SAAO)
The Southern African Large Telescope, currently in
Performance-Verification phase, observed the field of
GRB 051210 during evening twilight, and through
thickening cloud, with the Salticam CCD camera. Based on
comparison with nearby sources, and assuming R-I = 0, we
find no sources inside the Swift-XRT error circle
(Mangano et al; GCN 4315) down to a limiting magnitude
of I = 20.2 at 2005/12/10 18:48 UT.
[GCN OPS NOTE(12dec05): The Subject line was changed from 051201 to 051210.]
GCN Circular 4321
Subject
GRB 051210: BAT further refined analysis of the short burst
Date
2005-12-10T21:33:04Z (21 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
S. Barthelmy (GSFC), J. Cummings (GSFC/NRC), N. Gehrels (GSFC),
J. Norris (GSFC), D. Palmer (LANL), A. Parsons (GSFC)
on behalf of the Swift-BAT team:
The BAT team now believes this burst to be definitely short. The formal
T90 value is 1.2 +/- 0.2 sec (Sato, Circ 4318). The 6-sec_duration statement
in our 1st circ (Mangano, Circ 4315) was based on a non-background-subtracted
raw TDRSS lightcurve. We now have the mask-tagged lightcurve with a
ground energy scale calibration applied to the events, and the 2nd peak
at T+6 sec is not present (it may be attributable to a background fluctuation or
noisy detector(s)). We further note that the peak at T0 is resolved
into 3 separate peaks which is not uncommon in the BATSE short bursts.
The spectral lag (Norris & Bonnell, submitted to ApJ) for this burst
is -0.0010 sec (+0.0150 -0.0170 sec); very typical for short bursts.
Swift-XRT & UVOT follow-up observations are continuing and we encourage
other follow-up observations on this short burst.
GCN Circular 4320
Subject
GRB 051210: Swift XRT refined analysis
Date
2005-12-10T13:35:32Z (21 years ago)
From
David Burrows at PSU/Swift <dxb15@psu.edu>
V. Mangano, G. Cusumano, V. La Parola (INAF-IASF), D. N. Burrows (PSU), L.
Angelini (GSFC-JHU), and N. White (GSFC) report on behalf of the Swift team:
We have analyzed the Swift XRT data from the first observation
of GRB 051210 (Mangano et al. 2005, GCN 4315) consisting
of three orbits (about 5.7 ks exposure).
The refined coordinates of the X-ray afterglow are:
RA(J2000) = +22h 00m 41.3s
Dec(J2000) = -57d 36' 48.2"
with an estimated uncertainty of 4.2 arcseconds radius (90%
containment). The XRT boresight correction has been applied
through the new TELDEF file provided by the Swift Science
Data Center (Angelini et al. 2005, GCN 4313).
This position is 54.4 arcsec from the revised BAT position given
in GCN 4318 (Sato et al. 2005) and 3 arcsec from
the XRT position determined on board (Mangano et al. 2005, GCN 4315).
The 0.2-10 keV light curve, that starts in Windowed Timing (WT) mode
87.3 seconds after the BAT trigger, shows a fading behaviour with
a decaying slope of 2.3+/-0.1 over the first two orbits and
is not detectable anymore during the third (the expected count rate
at the end of the third orbit would be 7.0e-4 c/s).
A preliminary spectral fit to WT and PC data of the first two orbits
with an absorbed power law gives a photon index of 1.5+/-0.1 and an
absorption column of (7.5 +/- 3) x 1e20 cm^-2.
The Galactic absorption in the GRB direction is 2.2e20 cm^-2.
Assuming the current steep decay we predict a flux lower than
1.e-16 erg cm^-2 s^-1 at one day from the burst.
GCN Circular 4319
Subject
GRB 051210: FRAM early limit
Date
2005-12-10T13:10:40Z (21 years ago)
From
Martin Jelinek at Inst.Astrophys.Andalucia,Granada <mates@iaa.es>
Martin Jelinek (IAA Granada, Spain),
Petr Kubanek (ISDC Versoix, Swizerland and ASU Ondrejov, Czech Republic),
Michael Prouza (FZU Praha, Czech Republic)
Martin F. Nekola and Rene Hudec (ASU Ondrejov, Czech Republic)
report
We have observed GRB051210 using robotic telescope FRAM
located in Malargue, Argentina, with it's Wide Field camera,
starting 57.5s after the event. The first 10s exposure shows
no counterpart at the XRT position reported by Mangano et al.
(GCN 4315) down to 2-sigma limit R=14.0.
This message may be cited.
GCN Circular 4318
Subject
GRB 051210: Swift-BAT refined analysis of a short burst
Date
2005-12-10T08:54:24Z (21 years ago)
From
David Palmer at LANL <dmpalmer@mac.com>
G. Sato (ISAS), L. Angelini (GSFC-JHU), L. Barbier (GSFC),
S. Barthelmy (GSFC), M. Chester (PSU), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/NRC), J. Tueller (GSFC)
on behalf of the Swift-BAT team:
Using the BAT data set from T-60 to T+120 sec from the recent telemetry
downlink, we report further analysis of GRB 051210 (trigger #171931,
Mangano, et al., GCN 4315). The BAT ground-calculated position is
(RA,Dec) = 330.194,-57.623 (deg. J2000) {22h 0m 46.6s, -57d 37'21.0"}
2.0 arcmin radius (sys+stat, 90% containment). The partial coding
was 90%.
The burst light curve shape is a single, symmetric triangular peak.
T90 (15-350 keV) is 1.4 +- 0.2 sec (estimated error including
systematics).
The power law index of the time-averaged spectrum is 1.1 +- 0.3.
The fluence in the 15-150 keV band is (8.3 +- 1.4) x 10^-8 erg/cm2.
The 1-sec peak photon flux measured starting from T+0.1 sec in the
15-150 keV band is (7.5 +- 1.2) x 10^-1 ph/cm2/sec. All the quoted
errors are at the 90% confidence level.
GCN Circular 4317
Subject
GRB051210: Swift UVOT Observation
Date
2005-12-10T07:30:33Z (21 years ago)
From
Sally Hunsberger at PSU/Swift <sdh@astro.psu.edu>
on behalf of the Swift UVOT team.
The Swift Ultra-Violet/Optical Telescope began observing the field
at 05:47:43 UT, 82.5 seconds after BAT trigger 171931 (Mangano
et al. GCN 4315).
The 200s V-band image shows no optical counterpart within the
XRT positional error circle (Mangano et al. GCN 4315).
[GCN OPS NOTE(10dec05): Per author's request, the reference citation
was changed from Barthelmy to Mangano.]
GCN Circular 4316
Subject
GRB 051210: A short GRB in a cluster?
Date
2005-12-10T06:43:43Z (21 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (Carnegie Observatories) and D. Fox (Penn State) report:
"The position of GRB 051210 (GCN 4315) is located about 8' from the center
of the galaxy cluster APMCC 736 (Dalton et al. 1997, MNRAS, 289, 263) with
an estimated radius of at least 6' and z=0.114. We note that the XRT
position (GCN 4315) does not contain any obvious galaxy possibly
indicating a chance coincidence. However, the burst duration and temporal
structure may indicate a short GRB."
GCN Circular 4315
Subject
GRB 051210: Swift detection of a burst
Date
2005-12-10T06:26:53Z (21 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
V. Mangano (INAF-IASS), S. Barthelmy (GSFC), D. Burrows (PSU),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), S. Hunsberger (PSU),
D. Palmer (LANL), A. Parsons (GSFC)
on behalf of the Swift team:
At 05:46:21 UT, Swift-BAT triggered and located GRB 051210 (trigger=171931).
The spacecraft slewed immediately. The BAT on-board calculated location
is RA,Dec 330.197d,-57.634d {22h 00m 47s,-57d 38' 01"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows two ~1-sec peaks with a total duration of ~6 sec.
The peak count rate was ~2200 counts/sec (15-350 keV), at ~0 sec
after the trigger.
XRT began observing the field at 05:47:40.40, 79.2 sec after the BAT trigger.
Onboard centroiding found a bright fading uncatalogued X-ray source
in the field of view at the following coordinates:
RA(J2000): 22h 00m 41.7s
Dec(J2000): -57d 36' 48.2"
We estimate the uncertainty of this position to be 6 arcsec (radius,
90% containment). This position is 84 arcsec from the BAT position above.
The source initial flux is 9.7e-10 erg/cm2/sec.
The UVOT data products were delayed and the results will be forthcoming
in a second Circular.