GCN Circular 33437
Subject
GRB 230307A: AstroSat LAXPC detection
Date
2023-03-09T13:15:29Z (2 years ago)
From
Tilak Katoch at TIFR <tilak@tifr.res.in>
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:
https://www.tifr.res.in/~astrosat_laxpc/grb230307alc.jpg [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.
Links:
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[1] https://www.tifr.res.in/~astrosat_laxpc/grb230106lc.jpg