GRB120913B

This page lists all entries on GRB120913B in GRBweb

Summary Fermi GBM IPN Swift GCN 13763 GCN 13764 GCN 13765 GCN 13766 GCN 13767 GCN 13768 GCN 13770 GCN 13772 GCN 13773

Summary table
Variable Value Source
GRB_name_Fermi GRB120913997
T0 23:55:26.769 UTC Fermi_GBM
ra 213.6600° Swift
decl -14.5080° Swift
pos_error 7.77e-03° Swift
T90 130.05 s Fermi_GBM
T90_error 3.566 s Fermi_GBM
T90_start 23:55:26.769 UTC Fermi_GBM
fluence 2.03e-05 erg/cm² Fermi_GBM
fluence_error 7.55e-08 erg/cm² Fermi_GBM
T100 157.231 s
GBM_located False
mjd 56183.996837604165 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB120913997
trigger_name bn120913997
ra 213.6442°
decl -14.5350°
pos_error 3.66e+00°
datum 2012-09-13
t_trigger 23:55:58.770 UTC
T90 130.05 s
T90_error 3.566 s
T90_start 23:55:26.769 UTC
fluence 2.03e-05 erg/cm²
fluence_error 7.55e-08 erg/cm²
flux_1024 5.27e+00 erg/cm²/s
flux_1024_error 2.78e-01 erg/cm²/s
flux_1024_time 3.71e+01 erg/cm²/s
flux_64 7.39e+00 erg/cm²/s
flux_64_error 1.25e+00 erg/cm²/s
IPN table
GRB_name GRB120913B
ra 213.6458°
decl -14.5333°
pos_error 5.00e-02°
Swift table
GRB_name GRB120913B
t_trigger 23:55:58 UTC
ra 213.6600°
decl -14.5080°
pos_error 7.77e-03°
T90 126.0 s
fluence 1.11e-05 erg/cm²
GCN 13763 table
GRB_name GRB120913B
GCN_number 13763
Detection_method Swift Det
t_trigger 23:55:58 UTC
ra 213.6440°
decl -14.5350°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13763 SUBJECT: GRB 120913B: Swift detection of a burst DATE: 12/09/14 00:04:22 GMT FROM: Scott Barthelmy at NASA/GSFC E. A. Helder (PSU), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), D. Grupe (PSU), S. T. Holland (STScI), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 23:55:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120913B (trigger=533613). Swift did not slew because of the Sun observing constraint. The BAT on-board calculated location is RA, Dec 213.644, -14.535 which is RA(J2000) = 14h 14m 35s Dec(J2000) = -14d 32' 04" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several peaks with a total duration of about 70 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~5 sec after the trigger. Due to a Sun observing constraint, Swift cannot slew to the BAT position until 20:57 UT on 2012 December 14. There will thus be no XRT or UVOT data for this trigger before this time. Burst Advocate for this burst is E. A. Helder (helder AT 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 13764 table
GRB_name GRB120913B
GCN_number 13764
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 13764 SUBJECT: Skynet/PROMPT observations of GRB120913B DATE: 12/09/14 00:33:59 GMT FROM: Aaron LaCluyze at U.North Carolina A. LaCluyze, K. Ivarsen, J. Haislip, D. Reichart, J. Moore, H. T. Cromartie, R. Egger, A. Foster, N. Frank, M. Nysewander, A. Oza, E. Speckhard, A.Trotter, and J. A. Crain report: Skynet observed the field of GRB120913B (GCN 13763, Swift trigger #533613) with four of the PROMPT telescopes located at CTIO in Chile in BVRI beginning ~58 seconds after the burst. We detect a fading source at RA 14:14:38.46 DEC -14:30:57.2, within the BAT error circle. The object peaked at a magnitude of ~15.9 in R (calibrated to nearby SDSS catalog stars) at ~4.2 minutes after the burst before beginning to fade. Further observations are ongoing.
GCN 13765 table
GRB_name GRB120913B
GCN_number 13765
Detection_method Optical
ra 213.6607°
decl -14.5155°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13765 SUBJECT: GRB 120913B: TAROT La Silla observatory optical detection DATE: 12/09/14 00:41:33 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 120913B detected by SWIFT (trigger 533613) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 30.6s after the GRB trigger (17.7s after the notice). The elevation of the field decreased from 26 degrees above horizon and weather conditions were good. We detect a new fading source in the error box given by SWIFT. We detected the candidate couterpart mentioned by LaCluyze et al. (GCNC 13764) at the following position (+/- 2 arcsec): RA(J2000) = 14h 14m 38.57s DEC(J2000) -14d 30' 55.8" OT raised until R=15.8 5 min after the GRB. Now the afterglow is fading. Magnitudes were estimated with the nearby NOMAD1 star 0754-0289300 (R.A.=213.6332611 Decl=-14.5238889 J2000) R=15.99. MAgnitutes are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon=331.3041 lat=+43.7095 and the galactic extinction in R band is about 0.2 magnitude estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.
GCN 13766 table
GRB_name GRB120913B
GCN_number 13766
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13766 SUBJECT: GRB 120913B: TAROT La Silla observatory optical photometry DATE: 12/09/14 01:16:07 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 continue to observe the afterglow of GRB 120913B (LaCluyze et al. GCNC 13764). A rapid photometric analysis gives the following magnitudes: t0+Mid(s) Rmag 159 16.5 200 16.3 281 15.8 351 15.9 451 16.2 652 16.6 1054 17.0 We measure an optical decay alpha=-1 from observations after 300s, i.e. after the optical peak. Considering the optical decay, optical predicted magnitudes are: 2012-09-14T00:56 UT R=18.4 (t0+1h) 2012-09-14T01:56 UT R=19.1 (t0+2h) 2012-09-14T02:56 UT R=19.6 (t0+3h) 2012-09-14T03:56 UT R=20.0 (t0+4h) 2012-09-15T00:56 UT R=21.0 (t0+1day) These predictions can help spectrometry observations.
GCN 13767 table
GRB_name GRB120913B
GCN_number 13767
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13767 SUBJECT: Continued Skynet/PROMPT observations of GRB120913B DATE: 12/09/14 03:07:04 GMT FROM: Aaron LaCluyze at U.North Carolina A. LaCluyze, K. Ivarsen, J. Haislip, D. Reichart, J. Moore, H. T. Cromartie, R. Egger, A. Foster, N. Frank, M. Nysewander, A. Oza, E. Speckhard, A.Trotter, and J. A. Crain report: Skynet continued observing the field of GRB120913B (GCN 13763, Swift trigger #533613) in BVRI using four of the PROMPT telescopes located at CTIO in Chile until the object set. A preliminary light curve of the first night's data from PROMPT can be found at: http://skynet.unc.edu/grb/grb120913b.png
GCN 13768 table
GRB_name GRB120913B
GCN_number 13768
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13768 SUBJECT: GRB 120913B: REM NIR early time detection DATE: 12/09/14 08:07:13 GMT FROM: Stefano Covino at Brera Astronomical Observatory S. Covino, D. Fugazza, A. Melandri, on behalf of the REM team report: We imaged the field of GRB120913B (Helder et al., GCN 13763) with the NIR camera only with the H filter. The REM telescope is at present under substantial maintenance and the optical camera and some of the subsystems are still off-line. Observations started at UT 23:56:47, about 49 sec after the GRB, and frames were unfortunately not properly focussed. Yet the afterglow (LaClyyze et al., GCN 13764; Klotz et al., GCN 13765) is detectable and approximately 2 min after the GRB was at H = 13.72 +- 0.15, calibrated by means of isolated unsaturated 2MAS stars in the field.
GCN 13770 table
GRB_name GRB120913B
GCN_number 13770
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13770 SUBJECT: GRB 120913B: FRAM early follow up and detection DATE: 12/09/14 13:49:57 GMT FROM: Martin Jelinek at Inst.Astrophys.Andalucia,Granada Martin Jelinek (IAA Granada, Spain), Petr Kubanek, Martin Masek, Jakub Cerny, Jan Ebr and Michael Prouza (FZU Praha, Czech Rep.) on behalf of the FRAM team, coordinated by FZU Praha report: The 30cm FRAM telescope, located at Pierre Auger observatory in Malargue, Argentina, followed the GRB 120913B (Helder et al. GCNC13763, Swift trigger #533613). Observations started 24.4s after the GRB trigger. 10s R-band (lambda_eff = 640nm) images with a limit of ~16.0 were obtained. We identify the optical transient reported by LaCluyze et al. (GCNC13764) and Klotz et al. (GCNC13765) with a magnitude R = 16.3 +/- 0.2 on a sum of 8x10s images obtained between 271 and 364s after the GRB. This message may be cited
GCN 13772 table
GRB_name GRB120913B
GCN_number 13772
Detection_method Swift-BAT Det
ra 213.6600°
decl -14.5080°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13772 SUBJECT: GRB 120913B: Swift-BAT refined analysis DATE: 12/09/15 02:15:18 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), E. A. Helder (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), 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-240 to T+882 sec from the recent telemetry downlink, we report further analysis of BAT GRB 120913B (trigger #533613) (Helder, et al., GCN Circ. 13763). The BAT ground-calculated position is RA, Dec = 213.660, -14.508 deg, which is RA(J2000) = 14h 14m 38.3s Dec(J2000) = -14d 30' 27.9" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 59%. The mask-weighted light curve shows two main pulses riding on top of a broad peak. The burst starts at ~T-50 sec, with peaks at ~T+5 and ~T+39 sec, and ending at ~T+140 sec. T90 (15-350 keV) is 126 +- 4 sec (estimated error including systematics). The time-averaged spectrum from T-51.70 to T+111.79 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.63 +- 0.04. The fluence in the 15-150 keV band is 1.11 +- 0.02 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+38.46 sec in the 15-150 keV band is 3.2 +- 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/533613/BA/
GCN 13773 table
GRB_name GRB120913B
GCN_number 13773
Detection_method Fermi GBM Det
t_trigger 23:55:58.770 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 13773 SUBJECT: GRB 120913B: Fermi GBM observation DATE: 12/09/15 02:44:26 GMT FROM: Veronique Pelassa at UAH V. Pelassa (UAH) reports on behalf of the Fermi GBM Team: "At 23:55:58.77 UT on 13 september 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120913B (trigger 369273361 / 120913997), which was also detected by the Swift/BAT (E.A. Helder et al. 2008, GCN 13763) The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 66 degrees. The GBM light curve consists of 2 peaks at T0-10 and T0+30s on top of a longer plateau, with a duration (T90) of about 110 s (50-300 keV). The time-averaged spectrum from T0-40.961 s to T0+98.306 s is best fit by a Band function with Epeak = 163 +/- 23 keV, alpha = -1.19 +/- 0.06, and beta = -1.97 +/- 0.07 (Cstat 604 for 483 d.o.f.). The event fluence (10-1000 keV) in this time interval is (2.9 +/- 0.7)E-05 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+37.632 s in the 10-1000 keV band is 5.0 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."