{
  "circularId": 39117,
  "format": "text/plain",
  "createdOn": 1738438465043,
  "bibcode": "2025GCN.39117....1B",
  "subject": "GRB 250201A: INTEGRAL SPI/ACS detection",
  "submittedHow": "web",
  "eventId": "GRB 250201A",
  "body": "Patrizia Barria(a,b), Giulia Gianfagna(a), James Craig Rodi(a), Aishwarya Linesh Thakur(a), Lorenzo Natalucci(a,b), Luigi Piro(a) report:\n\nGRB 250201A was discovered by Fermi/GBM (GCN 39112) on 2025-02-01T09:59:46 (UTC). We searched for a corresponding counterpart in the INTEGRAL/SPI-ACS data.\n\nIn an SPI-ACS light curve above 80 keV, we find a signal temporally coincident with the GBM detection, having an approximate duration of ~ 20 sec. The signal consists of two pulses over this duration.\n\nThe approximate peak count rate in SPI-ACS is 77,500 cts/s for E>80 keV, over a median background rate of 62,800 cts/s.\n\nThis work is based on observations with INTEGRAL, an ESA project with instruments and a science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, and Spain), and with the participation of Russia and the USA. The SPI-ACS detector system has been provided by MPE Garching/Germany.\n\n-----\n(a) INAF/IAPS-Rome\n(b) ICSC National Research Centre for High-Performance Computing",
  "submitter": "Aishwarya L Thakur at INAF-IAPS, Rome <aishth@outlook.com>"
}