| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB121202181 |
|
| T0 |
4:20:04.564 UTC |
Fermi_GBM |
| ra |
256.7969° |
Swift |
| decl |
23.9482° |
Swift |
| pos_error |
1.81e-04° |
Swift |
| T90 |
17.152 s |
Fermi_GBM |
| T90_error |
1.999 s |
Fermi_GBM |
| T90_start |
4:20:04.564 UTC |
Fermi_GBM |
| fluence |
2.01e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
5.13e-08 erg/cm² |
Fermi_GBM |
| T100 |
20.536 s |
|
| GBM_located |
False |
|
| mjd |
56263.18060837963 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB121202181 |
| trigger_name |
bn121202181 |
| ra |
256.8150° |
| decl |
23.9519° |
| pos_error |
7.20e+00° |
| datum |
2012-12-02 |
| t_trigger |
4:20:09.172 UTC |
| T90 |
17.152 s |
| T90_error |
1.999 s |
| T90_start |
4:20:04.564 UTC |
| fluence |
2.01e-06 erg/cm² |
| fluence_error |
5.13e-08 erg/cm² |
| flux_1024 |
1.95e+00 erg/cm²/s |
| flux_1024_error |
1.72e-01 erg/cm²/s |
| flux_1024_time |
7.04e+00 erg/cm²/s |
| flux_64 |
4.09e+00 erg/cm²/s |
| flux_64_error |
1.34e+00 erg/cm²/s |
| IPN table |
|---|
| GRB_name |
GRB121202A |
| ra |
256.8167° |
| decl |
23.9500° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB121202A |
| t_trigger |
4:20:05 UTC |
| ra |
256.7969° |
| decl |
23.9482° |
| pos_error |
1.81e-04° |
| T90 |
20.1 s |
| fluence |
1.20e-06 erg/cm² |
| GCN 14032 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14032 |
| Detection_method |
Swift Det |
| t_trigger |
4:20:05 UTC |
| ra |
256.8150° |
| decl |
23.9520° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14032
SUBJECT: GRB 121202A: Swift detection of a burst
DATE: 12/12/02 04:29:22 GMT
FROM: Scott Barthelmy at NASA/GSFC
S. R. Oates (UCL-MSSL), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL),
M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the
Swift Team:
At 04:20:05 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 121202A (trigger=540255). Swift did not slew because
of the Earth limb observing constraint.
The BAT on-board calculated location is
RA, Dec 256.815, +23.952, which is
RA(J2000) = 17h 07m 16s
Dec(J2000) = +23d 57' 07"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows muliple peaks
with a total duration of about 40 sec. The peak count rate
was ~1300 counts/sec (15-350 keV), at ~13 sec after the trigger.
Due to an observing constraint, Swift will not slew until T0+44.1
minutes. There will be no XRT or UVOT data until this time.
Burst Advocate for this burst is S. R. Oates (sro AT mssl.ucl.ac.uk).
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 14033 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14033 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14033
SUBJECT: GRB 121202A: TAROT Calern observatory optical observations
DATE: 12/12/02 05:09:10 GMT
FROM: Alain Klotz at CESR-CNRS
Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),
Boer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:
We imaged the field of GRB 121202 detected by SWIFT
(trigger 540255) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.
The observations started 34.0s after the GRB trigger
(15.8s after the notice). However, the elevation of the field
increased from 1 degrees above horizon so it was possible
to detect stars on images only 275s after the trigger.
The first image does not show any optical counterpart:
t0+275s to t0+305s : R > 14.9
We co-added series of exposures:
t0+275s to t0+1419s : R > 16.2
t0+1633s to t0+2578s : R > 16.9
Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.
N.B. Galactic coordinates are lon= 45.1864 lat=+32.8357
and the galactic extinction in R band is about 0.1 magnitude
estimated from D. Schlegel et al. 1998ApJ...500..525S.
This message may be cited.
|
| GCN 14034 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14034 |
| Detection_method |
Swift-UVOT Det |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14034
SUBJECT: GRB121202A: Swift/UVOT Observations
DATE: 12/12/02 05:19:54 GMT
FROM: Mike Siegel at PSU/Swift MOC
M. H. Siegel (PSU) and S. R. Oates (UCL-MSSL) report on behalf of the
Swift/UVOT team:
Swift/UVOT began settled observations of the field of GRB 121202A
2828 s after the BAT trigger (Oates et al., GCN Circ 14032). UVOT took a
finding chart exposure of 150 seconds with the White filter. 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. The 8'x8' region for the list of sources generated on-board
covers 100% of the XRT error circle. The list of sources is typically complete to
about 18 mag. No correction has been made for the expected extinction
corresponding to E(B-V) of 0.05.
|
| GCN 14036 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14036 |
| Detection_method |
Swift-XRT Other |
| ra |
256.7970° |
| decl |
23.9489° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14036
SUBJECT: GRB 121202A: Swift-XRT observations
DATE: 12/12/02 06:10:34 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester), D.N. Burrows
(PSU), J.A. Kennea (PSU), S. Campana (INAF-OAB) and G. Cusumano
(INAF-IASF PA) report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 121202A at 05:07:09.7 UT,
2824.7 seconds after the BAT trigger. Using promptly downlinked data we
find an uncatalogued X-ray source located at RA, Dec 256.79704,
23.94886 which is equivalent to:
RA(J2000) = 17h 07m 11.29s
Dec(J2000) = +23d 56' 55.9"
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This
location is 60 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 in excess of the Galactic value (3.91 x
10^20 cm^-2, Kalberla et al. 2005), with an excess column of 3.9
(+2.19/-1.90) x 10^21 cm^-2 (90% confidence).
|
| GCN 14037 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14037 |
| Detection_method |
Swift-BAT Det |
| ra |
256.7900° |
| decl |
23.9420° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14037
SUBJECT: GRB 121202A: Swift-BAT refined analysis
DATE: 12/12/02 16:04:27 GMT
FROM: Scott Barthelmy at NASA/GSFC
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), S. R. Oates (UCL-MSSL),
D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS),
J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 121202A (trigger #540255)
(Oates, et al., GCN Circ. 14032). The BAT ground-calculated position is
RA, Dec = 256.790, 23.942 deg, which is
RA(J2000) = 17h 07m 09.7s
Dec(J2000) = +23d 56' 32.5"
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 70%.
The mask-weighted light curve shows a cluster of overlapping peaks
starting at ~T-10 sec and ending at ~T+25 sec. T90 (15-350 keV)
is 20.1 +- 1.9 sec (estimated error including systematics).
The time-averaged spectrum from T-2.18 to T+20.84 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.59 +- 0.11. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T-0.02 sec in the 15-150 keV band
is 1.2 +- 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/540255/BA/
|
| GCN 14038 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14038 |
| Detection_method |
Swift-XRT Det |
| ra |
256.7969° |
| decl |
23.9482° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14038
SUBJECT: GRB 121202A: Enhanced Swift-XRT position
DATE: 12/12/02 16:36:10 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester)
report on behalf of the Swift-XRT team.
Using 4781 s of XRT Photon Counting mode data and 9 UVOT
images for GRB 121202A, 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 = 256.79689, +23.94818 which is equivalent
to:
RA (J2000): 17h 07m 11.25s
Dec (J2000): +23d 56' 53.4"
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 14039 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14039 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
4:20:09.170 UTC |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14039
SUBJECT: GRB 121202A: Fermi GBM observation
DATE: 12/12/02 18:14:21 GMT
FROM: David Tierney at UCD
D. Tierney (UCD)
reports on behalf of the Fermi GBM Team:
"At 04:20:09.17 UT on 02 December 2012, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 121202A (trigger 376114812 / 121202181)
which was also detected by the Swift/BAT (Oates et al. 2012, GCN 14032)
The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight is 62 degrees.
The GBM light curve consists of a single weak pulse
with a duration (T90) of 17.7 +/- 1.7 s (50-300 keV).
The time-averaged spectrum from T0-4.1 s to T0+17.4 s is
best fit by a power law function with an exponential
high-energy cutoff. The power law index is -1.14 (+0.19/-0.17) and
the cutoff energy, parameterized as Epeak, is 135.4 (+23.6/-23.0) keV.
The event fluence (10-1000 keV) in this time interval is
(2.0 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0-5.1 s in the 10-1000 keV band
is 2.0 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|
| GCN 14040 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14040 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14040
SUBJECT: GRB 121202A: Swift-XRT refined Analysis
DATE: 12/12/02 18:41:45 GMT
FROM: Kim Page at U.of Leicester
K.L. Page (U. Leicester) and S. R. Oates (UCL-MSSL) report on behalf of
the Swift-XRT team:
We have analysed 12 ks of XRT data for GRB 121202A (Oates et al. GCN
Circ. 14032), from 2.8 ks to 31.9 ks after the BAT trigger. The data
comprise 16 s in Windowed Timing (WT) mode with the remainder in Photon
Counting (PC) mode. The enhanced XRT position for this burst was given
by Evans et al. (GCN. Circ 14038).
The light curve can be modelled with a power-law decay with a decay
index of alpha=1.66 (+/-0.08).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 2.08 (+/-0.15). The
best-fitting absorption column is 1.7 (+/-0.4) x 10^21 cm^-2, in
excess of the Galactic value of 3.9 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 3.6 x 10^-11 (5.3 x 10^-11) erg
cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 1.7 (+/-0.4) x 10^21 cm^-2
Galactic foreground: 3.9 x 10^20 cm^-2
Excess significance: 5.5 sigma
Photon index: 2.08 (+/-0.15)
If the light curve continues to decay with a power-law decay index of
1.66, the count rate at T+24 hours will be 2.1 x 10^-3 count s^-1,
corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.5 x
10^-14 (1.1 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/00540255.
This circular is an official product of the Swift-XRT team.
|
| GCN 14041 table |
|---|
| GRB_name |
GRB121202A |
| GCN_number |
14041 |
| Detection_method |
Swift-UVOT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 14041
SUBJECT: GRB 121202A: Swift/UVOT Upper Limits
DATE: 12/12/02 19:50:51 GMT
FROM: Samantha Oates at MSSL
S. R. Oates (MSSL-UCL) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 121202A
2828 s after the BAT trigger (Oates et al., GCN Circ. 14032).
No optical afterglow consistent with the XRT position
(Evans et al. GCN Circ. 14038)
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 2828 2978 147 >20.3
white 2828 5033 541 >21.0
v 3808 16147 1205 >20.2
b 3192 22680 1059 >20.9
u 2987 28451 2637 >21.2
w1 4218 27811 2853 >21.4
m2 4012 26905 2713 >21.5
w2 3603 31934 1549 >21.2
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.05 in the direction of the burst
(Schlegel et al. 1998).
|