Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 33437

GRB 230307A: AstroSat LAXPC detection
2023-03-09T13:15:29Z (a year ago)
Tilak Katoch at TIFR <>
Tilak Katoch, H. M. Antia and Parag Shah TIFR, Mumbai, India.

Analysis of AstroSat LAXPC data showed the clear detection of a long GRB 
230307A. The lightcurve shows the multiple burst profile with the peak 
triggered at T0 = 15h 44m 03s UT on 07 Mar 2023. The satellite was in a 
normal operating mode and well before the entry into the SAA region.

The lightcurve has a burst profile with T90 = 36 sec. The strongest peak 
measured have a count rate above the background with 13321 +/- 117 
count/sec in LAXPC10 and 4415 +/- 68 count/sec in LAXPC20 at T0+7 sec.

Both LAXPC instruments (LAXPC10 and LAXPC20) have registered this burst 
profile in the light curve. For LAXPC20, the nominal energy range is 
3-100 keV, but due to the lower gain in LAXPC10 the energy range is 
about 30-400 keV.

The background subtracted lightcurve with 1 sec time-bin is available at 
the website: [1]

LAXPC was built by TIFR in collaboration with the Indian Space Research 
Organisation. The Indian Space Research Organisation funded, managed and 
facilitated the project.

Looking for U.S. government information and services? Visit