GRB150513A

This page lists all entries on GRB150513A in GRBweb

Summary Fermi GBM IPN Swift Fermi LAT GCN 17810 GCN 17812 GCN 17813 GCN 17814 GCN 17871 GCN 17886

Summary table
Variable Value Source
GRB_name_Fermi GRB150513856
T0 20:30:38.068 UTC Fermi_GBM
ra 49.0440° Swift
decl -22.8680° Swift
pos_error 7.77e-03° Swift
T90 158.978 s Fermi_GBM
T90_error 2.862 s Fermi_GBM
T90_start 20:30:38.068 UTC Fermi_GBM
fluence 7.54e-06 erg/cm² Fermi_GBM
fluence_error 8.51e-08 erg/cm² Fermi_GBM
T100 202.932 s
GBM_located False
mjd 57155.85460726852 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB150513856
trigger_name bn150513856
ra 49.0600°
decl -22.9100°
datum 2015-05-13
t_trigger 20:33:15.254 UTC
T90 158.978 s
T90_error 2.862 s
T90_start 20:30:38.068 UTC
fluence 7.54e-06 erg/cm²
fluence_error 8.51e-08 erg/cm²
flux_1024 4.44e+00 erg/cm²/s
flux_1024_error 3.07e-01 erg/cm²/s
flux_1024_time 1.92e-01 erg/cm²/s
flux_64 6.23e+00 erg/cm²/s
flux_64_error 1.34e+00 erg/cm²/s
IPN table
GRB_name GRB150513A
ra 49.0583°
decl -22.9167°
pos_error 5.00e-02°
Swift table
GRB_name GRB150513A
t_trigger 20:31:19 UTC
ra 49.0440°
decl -22.8680°
pos_error 7.77e-03°
T90 162.0 s
fluence 5.40e-06 erg/cm²
Fermi LAT table
GRB_name_Fermi GRB150513855
GRB_name GRB150513A
MET 453241882.73
datum 2015-05-13
t_trigger 20:31:19.730 UTC
ra 49.0580°
decl -22.9130°
pos_error 5.00e+00°
GCN 17810 table
GRB_name GRB150513A
GCN_number 17810
Detection_method Swift Det
t_trigger 20:31:19 UTC
ra 49.0580°
decl -22.9130°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17810 SUBJECT: GRB 150513A: Swift detection of a burst DATE: 15/05/13 20:41:22 GMT FROM: Daniel Kocevski at SLAC D. Kocevski (NASA/GSFC/ORAU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), K. L. Page (U Leicester) and J. L. Racusin (NASA/GSFC) report on behalf of the Swift Team: At 20:31:19 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 150513A (trigger=640584). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 49.058, -22.913 which is RA(J2000) = 03h 16m 14s Dec(J2000) = -22d 54' 45" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 140 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~4 sec after the trigger. Due to a Sun observing constraint, Swift cannot slew to the BAT position until 11:32 UT on 2015 May 28. There will thus be no XRT or UVOT data for this trigger before this time. Burst Advocate for this burst is D. Kocevski (dankocevski AT gmail.com). 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 17812 table
GRB_name GRB150513A
GCN_number 17812
Detection_method Fermi LAT Det
t_trigger 20:33:15.250 UTC
ra 49.2000°
decl -23.2000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17812 SUBJECT: GRB 150513A: Fermi-LAT detection DATE: 15/05/14 04:43:47 GMT FROM: Daniel Kocevski at GSFC GRB 150513A: Fermi-LAT detection D. Kocevski (NASA/GSFC), G. Vianello (Stanford), and M. Arimoto (Tokyo Tech), report on behalf of the Fermi-LAT team: At 20:33:15.25 on May 05, 2015, Fermi-LAT detected high-energy emission from GRB 150513A, which was also detected by Fermi-GBM (trigger 453241998) and Swift-BAT (Kocevski et al. 2015, GCN 17810). The best LAT on-ground location is found to be RA, Dec 49.2, -23.2 (J2000) with an error radius of 0.4 deg (90% containment, statistical error only). This position was 50 deg from the LAT boresight at the time of the trigger and consistent with the position found by Swift-BAT. The data from the Fermi-LAT show a significant increase in the event rate that is spatially and temporally correlated with the GBM emission with high significance. The highest-energy event is a 2.1 GeV event detected at T0 + 60 s. The GRB was observable from T0 to T0 + 385 s, before the spacecraft entered the South Atlantic Anomaly, where data gathering is disabled. The Fermi-LAT point of contact for this burst is Makoto Arimoto (arimoto@hp.phys.titech.ac.jp). The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN 17813 table
GRB_name GRB150513A
GCN_number 17813
Detection_method Fermi GBM Det
t_trigger 20:33:15.250 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 17813 SUBJECT: GRB 150513A: Fermi GBM detection DATE: 15/05/14 08:21:13 GMT FROM: George A. Younes at USRA/NASA/MSFC Younes G. (USRA at GWU) and Meegan C. (UAH) report on behalf of the Fermi GBM Team: "At 20:33:15.25 UT, on 2015 May 13, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 150513A (trigger 453241998 / 150513856) which was also detected by Swift (Kocevski et al. 2015, GCN 17810) and Fermi/LAT (Kocevski et al. 2015, GCN 17812). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is about 45 degrees. The GBM light curve shows two peaks separated by about 150 s with a duration (T90) of 165 s (50-300 keV). The time-averaged spectrum from T0-161.5 s to T0+4.3 s is well fit by a BAND function with Epeak = 252 +/- 63 keV, alpha = -0.9 +/- 0.1, and beta = -1.69 +/- 0.06. The event fluence (10-1000 keV) in this time interval is (1.36 +/- 0.04)E-05 erg/cm^2. The 1 second peak photon flux measured starting from T0+0.2 s in the 10-1000 keV band is 4.1 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 17814 table
GRB_name GRB150513A
GCN_number 17814
Detection_method Swift-BAT Det
ra 49.0440°
decl -22.8680°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17814 SUBJECT: GRB 150513A: Swift-BAT refined analysis DATE: 15/05/14 17:50:21 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift GRB 150513A: Swift-BAT refined analysis A. Y. Lien (GSFC/UMBC), 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 (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 150513A (trigger #640584) (Kocevski, et al., GCN Circ. 17810). The BAT ground-calculated position is RA, Dec = 49.044, -22.868 deg which is RA(J2000) = 03h 16m 10.6s Dec(J2000) = -22d 52' 03.3" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 64%. The mask-weighted light curve shows multiple peaks with a return to background levels in between them. T90 (15-350 keV) is 162 +- 5 sec (estimated error including systematics). The time-averaged spectrum from T-54.33 to T+129.36 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.40 +- 0.07. The fluence in the 15-150 keV band is 5.4 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+115.41 sec in the 15-150 keV band is 2.9 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN 17871 table
GRB_name GRB150513A
GCN_number 17871
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 17871 SUBJECT: GRB 150513A: request for X-ray follow up DATE: 15/05/25 23:53:47 GMT FROM: Remo Rufinni at ICRA R. Ruffini, C. L. Bianco, M. Enderli, M. Kovacevic, M. Muccino, G. B. Pisani, J. A. Rueda, Y. Wang reports: The observation of high-energy emission from GRB 150513A by Fermi-LAT [1] clearly points to a binary-driven hypernova (BdHN) nature of the source [2], in spite of the missing follow-up from Swift/XRT and UVOT due to a Sun observing constraint which will last until the 28th of May [3]. BdHNe have a standard behavior in the late X-ray luminosity [4,5,6], thus we expect the X-ray emission of GRB 150513A to follow such a behavior as well. Assuming that the X-ray luminosity of GRB 150513A is comparable with the BdHN prototypical one of GRB 090618 (GRB 130427A), a detection by Swift/XRT of GRB 150513A on the 28th of May implies an upper limit for its redshift z<0.8 (z<2). Therefore, we strongly encourage observation by Swift/XRT of GRB 150513A from the 28th of May on. This would give a fundamental information on the nature of this source, despite the absence of data between May 13th and May 28th. References: [1] Kocevski et al. 2015, GCN 17812 [2] Ruffini et al. 2015, ApJ, 798, 10R [3] Kocevski et al. 2015, GCN 17810 [4] Ruffini et al. 2014, A&A, 565, L10 [5] Pisani et al. 2013, A&A, 552, L5 [6] Ruffini et al. 2014, A&A, 569, A39
GCN 17886 table
GRB_name GRB150513A
GCN_number 17886
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 17886 SUBJECT: GRB 150513A: Swift-XRT observations DATE: 15/05/29 13:16:32 GMT FROM: Andy Beardmore at U Leicester A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), D.N. Burrows (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester) and A. Y. Lien (GSFC/UMBC) report on behalf of the Swift-XRT team: We have analysed of XRT data for the Swift/BAT-detected burst GRB 150513A (Lien et al. GCN Circ. 17814), collecting 5.0 ks of Photon Counting (PC) mode data between T0+1309.8 ks and T0+1322.8 ks. No X-ray sources have been detected inside or close to the Swift/BAT error region. The 3-sigma upper limit at the Swift/BAT position is 0.001 ct s^-1, corresponding to a 0.3-10 keV observed flux of 5.8e-14 to erg cm^-2 s^-1 (assuming a typical GRB spectrum). The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at http://www.swift.ac.uk/ToO_GRBs/00640584. This circular is an official product of the Swift-XRT team.