GRB121117A

This page lists all entries on GRB121117A in GRBweb

Summary IPN Swift GCN 13967 GCN 13968 GCN 13969 GCN 13970 GCN 13971 GCN 13972 GCN 13973 GCN 13976 GCN 13978 GCN 13980 GCN 14004

Summary table
Variable Value Source
T0 8:50:56 UTC GCN_circulars,Swift Det
ra 31.6107° Swift
decl 7.4196° Swift
pos_error 7.77e-05° Swift
T90 30.0 s Swift
T90_start 8:50:56 UTC Swift
fluence 1.40e-06 erg/cm² Swift
T100 30.0 s
GBM_located False
mjd 56248.3687037037 GCN_circulars,Swift Det
IPN table
GRB_name GRB121117A
ra 31.6333°
decl 7.3833°
pos_error 5.00e-02°
Swift table
GRB_name GRB121117A
t_trigger 8:50:56 UTC
ra 31.6107°
decl 7.4196°
pos_error 7.77e-05°
T90 30.0 s
fluence 1.40e-06 erg/cm²
GCN 13967 table
GRB_name GRB121117A
GCN_number 13967
Detection_method Swift Det
t_trigger 8:50:56 UTC
ra 31.6350°
decl 7.3790°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13967 SUBJECT: GRB 121117A: Swift detection of a burst DATE: 12/11/17 09:07:42 GMT FROM: David Palmer at LANL J. R. Cummings (NASA/UMBC), A. P. Beardmore (U Leicester), V. D'Elia (ASDC), C. Gronwall (PSU), C. Guidorzi (U Ferrara), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 08:50:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 121117A (trigger=538696). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 31.635, +7.379 which is RA(J2000) = 02h 06m 32s Dec(J2000) = +07d 22' 44" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 20 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 08:51:49.2 UT, 52.2 seconds after the BAT trigger. No source was detected in the 2.5-s promptly available image. We are waiting for the full dataset to detect and localise the XRT counterpart. UVOT prompt data are not available at this time. We are waiting for the full dataset to search for an UVOT counterpart. This burst occurred as the Swift spacecraft was approaching the South Atlantic Anomaly and the source was approaching the Earth Limb observing constraint. As a result, only a brief exposure under high background conditions is available for the narrow-field instruments during the first orbit. Burst Advocate for this burst is J. R. Cummings (jayc AT milkyway.gsfc.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 13968 table
GRB_name GRB121117A
GCN_number 13968
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13968 SUBJECT: GRB 121117A: BOOTES-3 early optical upper limit DATE: 12/11/17 10:42:15 GMT FROM: Juan Carlos Tello at IAA-CSIC J.C. Tello (IAA-CSIC), J. Gorosabel (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), W. Allen (Vintage Lane Obs.), Ph. Yock and Kuan-Yu Lin (Auckland Univ.), P. Kubanek (IP AS CR & IAA-CSIC), report on behalf of a larger collaboration: "We observed the field of GRB 121117A (Cummings et al., GCNC 13967) , detected by Swift/BAT, with the 0.6m Yock-Allen robotic telescope (BOOTES-3) located in Blenheim, New Zealand. Unfiltered images were obtained starting 09:04:07UT (13m after the burst, limited by clouds). An exposure of 30 seconds resulted in a limiting magnitude of 16.0 when calibrated with the R1Mag value of USNO-B1.0 catalogue stars. Due to clouds, combining images did not provide a deeper limiting magnitude" This message may be cited.
GCN 13969 table
GRB_name GRB121117A
GCN_number 13969
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 13969 SUBJECT: GRB 121117A: ROTSE-III Optical Limits DATE: 12/11/17 13:05:41 GMT FROM: Weikang Zheng at U.of Michigan W. Zheng (U Mich), report on behalf of the ROTSE collaboration: ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 121117A (Swift trigger 538696; Cummings et al., GCN 13967), producing images beginning 9.1 s after the GCN notice time. An automated response took the first image at 08:51:21.1 UT, 24.1 s after the burst, under fair conditions. We took 10 5-sec, 10 20-sec and 20 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle. Individual images have limiting magnitudes ranging from 14.9-16.4; we set the following specific limits. start UT end UT t_exp(s) mlim Coadd? --------------------------------------------------- 08:50:57.0 08:55:57.0 5 15.0 N 08:51:32.0 08:51:37.0 5 15.0 N 08:51:43.0 08:51:48.0 5 15.4 N 08:51:55.0 08:52:00.0 5 15.2 N 08:52:07.0 08:52:12.0 5 15.2 N 08:50:57.0 08:53:04.0 50 16.8 Y 08:53:18.0 08:57:59.0 200 17.2 Y
GCN 13970 table
GRB_name GRB121117A
GCN_number 13970
Detection_method Swift-BAT Det
ra 31.6170°
decl 7.4320°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13970 SUBJECT: GRB 121117A, Swift-BAT refined analysis DATE: 12/11/17 21:31:41 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-61 to T+191 sec from the recent telemetry downlink, we report further analysis of BAT GRB 121117A (trigger #538696) (Cummings, et al., GCN Circ. 13967). The BAT ground-calculated position is RA, Dec = 31.617, 7.432 deg which is RA(J2000) = 02h 06m 28.1s Dec(J2000) = +07d 25' 55.6" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a single FRED peak. Swift was close to the SAA and BAT entered SAA mode about 250 seconds after the trigger. T90 (15-350 keV) is 30 +- 5 sec (estimated error including systematics). The time-averaged spectrum from T+0.0 to T+158.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.16 +- 0.18. The fluence in the 15-150 keV band is 1.4 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+7.06 sec in the 15-150 keV band is 1.1 +- 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/538696/BA/
GCN 13971 table
GRB_name GRB121117A
GCN_number 13971
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13971 SUBJECT: GRB 121117A: MASTER prompt optical limit DATE: 12/11/18 07:56:13 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk 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 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.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, 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 Blagoveschensk was pointed to the GRB121117A 47 sec after GRB time at 2012-11-17 08:51:43.208 UT. On our first (10s exposure) set we haven't found optical transient within SWIFT error-box (Cummings et al., GCN Circ. 13967). The 5-sigma upper limit has been about 13.7 mag This is the prompt limit because our observations was done during Gamma-ray activity (Cummings et al., GCN Circ. 13970). The message may be cited.
GCN 13972 table
GRB_name GRB121117A
GCN_number 13972
Detection_method Swift-XRT Other
ra 31.6106°
decl 7.4195°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13972 SUBJECT: GRB 121117A: Swift-XRT refined Analysis DATE: 12/11/18 08:37:46 GMT FROM: Andy Beardmore at U Leicester A.P. Beardmore (U. Leicester) and J. R. Cummings (NASA/UMBC) report on behalf of the Swift-XRT team: We have analysed 13 ks of XRT data for GRB 121117A (Cummings et al. GCN Circ. 13967), from 41 s to 62.7 ks after the BAT trigger. The data comprise 204 s in Windowed Timing (WT) mode (the first 5 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. Using 3463 s of PC mode data and 6 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 31.61064, +7.41954 which is equivalent to: RA (J2000): 02h 06m 26.55s Dec(J2000): +07d 25' 10.4" with an uncertainty of 1.7 arcsec (radius, 90% confidence). The light curve can be modelled with a power-law decay with a decay index of alpha=1.27 (+/-0.04). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.55 (+0.22, -0.19). The best-fitting absorption column is 8.4 (+7.2, -3.2) x 10^20 cm^-2, consistent with the Galactic value of 5.2 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 4.2 x 10^-11 (4.7 x 10^-11) erg cm^-2 count^-1. A summary of the WT-mode spectrum is thus: Total column: 8.4 (+7.2, -3.2) x 10^20 cm^-2 Galactic foreground: 5.2 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 1.55 (+0.22, -0.19) If the light curve continues to decay with a power-law decay index of 1.27, the count rate at T+24 hours will be 9.9 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.2 x 10^-14 (4.7 x 10^-14) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00538696. This circular is an official product of the Swift-XRT team.
GCN 13973 table
GRB_name GRB121117A
GCN_number 13973
Detection_method Swift-UVOT Det
ra 31.6106°
decl 7.4196°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13973 SUBJECT: GRB 121117A: Swift/UVOT Observations DATE: 12/11/18 12:41:31 GMT FROM: Samantha Oates at MSSL S. R. Oates (MSSL-UCL) and J. R. Cummings (NASA/UMBC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 121117A s after the BAT trigger (Cummings et al., GCN Circ. 13967). We find an optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 13972) in the initial UVOT white exposure. The refined UVOT position is (RA,DEC) = 31.61063, 7.41956 (J2000), which is equivalent to: RA (J2000) = 02:06:26.56 Dec (J2000) = +07:25:10.5 with an estimated uncertainty of 0.6 arcsec (radius, 90% confidence). Preliminary magnitudes and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white (FC) 57 205 146 19.17 +/- 0.10 white 4606 10267 1150 >21.9 v 3580 11882 1077 >20.3 b 4400 6037 393 >20.6 u 4195 5831 393 >20.3 w1 3990 5627 393 >20.3 m2 3785 5421 393 >20.2 w2 4811 11174 1082 >21.3 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 13976 table
GRB_name GRB121117A
GCN_number 13976
Detection_method GROND
Circular_text TITLE: GCN CIRCULAR NUMBER: 13976 SUBJECT: GRB 121117A: GROND confirmation of the UVOT afterglow candidate DATE: 12/11/19 22:35:54 GMT FROM: Sylvio Klose at TLS Tautenburg A. Nicuesa Guelbenzu, S. Klose (both TLS Tautenburg), M. Nardini (Universita degli studi di Milano-Bicocca), and J.Greiner (MPE Garching) report on behalf of the GROND team: We observed the field of GRB 121117A (Swift trigger 538696, Cummings et al., GCN #13967) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG/ESO telescope at La Silla Observatory (Chile). First-epoch observations started on November 18, 2012, at 00:16 UT, about 15.5 hrs after the GRB trigger. Second-epoch observations were performed the following night. On the first-epoch images we find a faint source within the r=1.7 arcsec XRT error circle (Beardmore et al., GCN 13972) at coordinates RA(J2000) = 02:06:26.58, Dec. = 07:25:10.2 (+/- 0".3). Within the astrometric error this is consistent with the object seen by UVOT in the white band during the first 200 seconds after the GRB trigger (Oates et al., GCN 13973). For this source we measure the following preliminary AB magnitudes: g' > 24.0, r' = 23.6 +/- 0.2, i' = 23.0 +/- 0.2, z' > 23.1, J > 21.3, H > 20.8, K > 19.5, calibrated against SDSS and 2MASS field stars. On the second-epoch images the object had faded to r'=24.5 +/- 0.2 and i'>24.3, implying that this was the GRB afterglow.
GCN 13978 table
GRB_name GRB121117A
GCN_number 13978
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13978 SUBJECT: GRB 121117A: optical upper limit DATE: 12/11/21 07:21:38 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (SAI MSU, IKI), D.Varda (ISON), E.Sinyakov (ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 121117A (Cummings et al., GCN 13967) with ORI-25 telescope of ISON-Blagoveshensk observatory starting on Nov.17 (UT) 09:05:39. We took several unfiltered exposures within 2 hours after the start. We do not detect the OT (Oates et al., GCN 13973) in the XRT error circle (Beardmore et al. GCN 13972) in any stacked images. A photometry is based on nearby USNO-B1.0 stars (R2): T_start T0+, Filter, exposure, UL (3 sigma) (UT) mid (d) (s) 09:05:39 0.03105 none 80 x 40 18.3 10:05:44 0.07483 none 88 x 40 18.4 09:05:39 0.05397 none 168 x 40 18.9
GCN 13980 table
GRB_name GRB121117A
GCN_number 13980
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13980 SUBJECT: GRB 121117A: Optical observations DATE: 12/11/21 11:24:44 GMT FROM: Shashi Bhushan Pandey at ROTSE Brajesh Kumar, Ram Kesh Yadav, S.B. Pandey and V.K. Bhatt (ARIES, Nainital, India, on behalf of larger Indian GRB collaboration). GRB 121117A (Cummings et al., GCN 13967) field was observed with the 1.3m Devasthal Fast Optical Telescope at Nainital. Three images in R_c pass-band (300 sec each) starting at 2012-11-17 14:35:26 (UT) were acquired. In the co-added R_c frame (300sec x 3), we did not detect the optical source (Oates et al., GCN 13973) down to a limiting magnitude of ~20.5 mag (in comparison to nearby USNO- B1 stars). This massage may be cited.
GCN 14004 table
GRB_name GRB121117A
GCN_number 14004
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14004 SUBJECT: GRB 121117A: Terskol obseravtions DATE: 12/11/27 08:45:18 GMT FROM: Vladimir Sokolov at SAO RAS I. V. Sokolov, A. V. Sergeev, M. V. Andreev (TB INASAN, Russia), V. B. Petkov (BNO INR RAS, Russia), A. S. Moskvitin, V. N. Komarova (SAO RAS, Russia), on behalf of larger GRB collaboration report: GRB 121117A (Cummings et al., GCN 13967) field was observed with the 2-m telescope at the Mt. Peak Terskol since 6 hours after the trigger (2012-11-17, 14:50:02 -- 15:05:20 UT). We obtained 3 x 300 sec. images in R and did not detect any source (reported in Oates et al., GCN 13973 and in Nicuesa Guelbenzuet al., GCN 13976) down to a limiting magnitude of ~21.1 mag as well as the Indian team observing at the same time (Kumar et al., GCN 13980). Calibrations were done by the same nearby USNO-B1 stars as in Volnova et al., GCN 13978. The magnitude was not corrected for the Galactic extinction E(B-V) = 0.06.