TITLE: GCN CIRCULAR NUMBER: 33155 SUBJECT: GRB 230106: AstroSat LAXPC detection DATE: 23/01/11 04:54:09 GMT FROM: 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 230106. The lightcurve shows the multiple burst profile with the peak triggered at T0 = 00h 55m 22s UT on 06 Jan 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 =~ 77 sec. The strongest peak measured has a count rate above the background with 876 +/- 35 count/sec in LAXPC10 and 1083 +/- 36 count/sec in LAXPC20 at T0+23 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/grb230106lc.jpg LAXPC was built by TIFR in collaboration with the Indian Space Research Organisation. The Indian Space Research Organisation funded, managed and facilitated the project.