GRB150824A

This page lists all entries on GRB150824A in GRBweb

Summary Fermi GBM IPN GCN 18201 GCN 18202 GCN 18203

Summary table
Variable Value Source
GRB_name_Fermi GRB150824079
T0 1:53:30.119 UTC GCN_circulars,Konus-Wind Det
ra 161.2500° IPN
decl -55.9167° IPN
pos_error 1.00e+00° IPN
T90 13.568 s Fermi_GBM
T90_error 0.362 s Fermi_GBM
T90_start 1:53:32.500 UTC Fermi_GBM
fluence 1.97e-05 erg/cm² Fermi_GBM
fluence_error 4.14e-08 erg/cm² Fermi_GBM
T100 15.949 s
GBM_located False
mjd 57258.07882082176 GCN_circulars,Konus-Wind Det
Fermi GBM table
GRB_name_Fermi GRB150824079
trigger_name bn150824079
ra 167.5500°
decl -56.7669°
pos_error 2.42e+00°
datum 2015-08-24
t_trigger 1:53:31.764 UTC
T90 13.568 s
T90_error 0.362 s
T90_start 1:53:32.500 UTC
fluence 1.97e-05 erg/cm²
fluence_error 4.14e-08 erg/cm²
flux_1024 2.23e+01 erg/cm²/s
flux_1024_error 3.74e-01 erg/cm²/s
flux_1024_time 1.06e+00 erg/cm²/s
flux_64 3.20e+01 erg/cm²/s
flux_64_error 1.62e+00 erg/cm²/s
IPN table
GRB_name GRB150824A
ra 161.2500°
decl -55.9167°
pos_error 1.00e+00°
GCN 18201 table
GRB_name GRB150824A
GCN_number 18201
Detection_method Fermi GBM Det
t_trigger 1:53:31.760 UTC
ra 161.3000°
decl -55.9000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 18201 SUBJECT: GRB 150824A: Fermi GBM detection DATE: 15/08/24 16:04:33 GMT FROM: Elisabetta Bissaldi at U.Innsbruk/IAPP E. Bissaldi (INFN Bari) and E. Burns (UAH) report on behalf of the Fermi GBM Team: "At 01:53:31.76 UT on 24 August 2015, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 150824A (trigger 462074015 / 150824079). The on-ground calculated location, using the GBM trigger data, is RA = 161.3 DEC = -55.9 (J2000 degrees, equivalent to 10h 45m, -55d 55'), with an uncertainty of 1.0 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a core-plus-tail model, with 90% of GRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg systematic error. [Connaughton et al. 2015, ApJS, 216, 32] ). The angle from the Fermi LAT boresight at the GBM trigger time is 74 degrees. The GBM light curve consists of several peaks with a duration (T90) of about 13 s (50-300 keV). The time-averaged spectrum from T0 to T0+15 s is best fit by a Band function with Epeak = 187 +/- 9 keV, alpha = -0.77 +/- 0.03, and beta = -2.40 +/- 0.10. The event fluence (10-1000 keV) in this time interval is (2.03 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1 s in the 10-1000 keV band is 22.2 +/- 0.5 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 18202 table
GRB_name GRB150824A
GCN_number 18202
Detection_method IPN Triangulation
t_trigger 1:53:32 UTC
ra 167.5500°
decl -56.9640°
Circular_text TITLE: GCN CIRCULAR NUMBER: 18202 SUBJECT: IPN Triangulation of GRB 150824A DATE: 15/08/25 16:29:47 GMT FROM: Dmitry Svinkin at Ioffe Institute K. Hurley, on behalf of the IPN, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, S. Golenetskii, R. Aptekar, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa, and A. Goldstein, on behalf of the Fermi GBM team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, report: The long-duration, bright GRB 150824A has been detected by Fermi (GBM: Bissaldi and Burns, GCN Circ. 18201), Konus-Wind, INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND), so far, at about 6812 s UT (01:53:32). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 167.550 (11h 10m 12s) -56.964 (-56d 57' 49") Corners: 166.891 (11h 07m 34s) -57.136 (-57d 08' 10") 167.182 (11h 08m 44s) -57.159 (-57d 09' 31") 168.205 (11h 12m 49s) -56.787 (-56d 47' 12") 167.915 (11h 11m 40s) -56.767 (-56d 46' 03") --------------------------------------------- The error box area is 253 sq. arcmin, and its maximum dimension is 48 arcmin (the minimum one is 6.2 arcmin). The Sun distance was 69 deg. This box may be improved. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB150824_T06810/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN 18203 table
GRB_name GRB150824A
GCN_number 18203
Detection_method Konus-Wind Det
t_trigger 1:53:30.119 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 18203 SUBJECT: Konus-Wind observation of GRB 150824A DATE: 15/08/25 16:37:18 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline on behalf of the Konus-Wind team, report: The long-duration, bright GRB 150824A (Fermi-GBM detection: Bissaldi & Burns, GCN 18201; IPN triangulation: Hurley et al., GCN 18202) triggered Konus-Wind at T0=6810.119 s UT (01:53:30.119). The light curve shows several pulses in the interval from ~T0-0.5 s to ~T0+15 s. The emission is seen up to ~5 MeV. As observed by Konus-Wind, the burst had a fluence of 1.8(-0.2,+0.2)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+0.896 s, of 7.6(-0.8,+0.9)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum (measured from T0 to T0+16.384 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -0.96 (-0.16,+0.11), the high energy photon index beta = -3.11 (-6.89,+0.44), the peak energy Ep = 197 (-16,+22) keV, chi2 = 106/97 dof. The spectrum near the peak count rate (measured from T0 to T0+8.192 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -0.83 (-0.11,+0.12), the high energy photon index beta = -2.79 (-0.56,+0.29), the peak energy Ep = 200 (-19,+20) keV, chi2 = 90/92 dof. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB150824_T06810/ All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.