GRB 190919A
GCN Circular 25783
Subject
GRB 190919A: Fermi GBM Final Real-time Localization
Date
2019-09-19T18:30:16Z (6 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 18:20:02 UT on 19 Sep 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190919A (trigger 590610007.65552 / 190919764).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 357.4, Dec = -21.8 (J2000 degrees, equivalent to J2000 23h 49m, -21d 48'), with a statistical uncertainty of 2.5 degrees.
The angle from the Fermi LAT boresight is 83.0 degrees.
The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190919764/quicklook/glg_skymap_all_bn190919764.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190919764/quicklook/glg_healpix_all_bn190919764.fit
The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190919764/quicklook/glg_lc_medres34_bn190919764.gif
GCN Circular 25935
Subject
GRB 190919A: AstroSat CZTI detection
Date
2019-10-03T12:38:11Z (6 years ago)
From
Ramkrishna Gaikwad at IUCAA/AstroSat <ramkrishna@iucaa.in>
R. Gaikwad, V. Sharma, D. Bhattacharya and A. Vibhute (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed the detection of a GRB 190919A, which was also detected by Fermi GBM Final Real-time Localization (GCN #25783).
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with the strongest peak at 2019-09-19 18:20:02.0 UT. The measured peak count rate associated with the burst is 340 cts/s above the background in the combined data of four quadrants, with a total of 4389 cts. The local mean background count rate was 492 cts/s. Using cumulative rates, we measure a T90 of 42.6 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.