TITLE: GCN CIRCULAR NUMBER: 32900 SUBJECT: GRB 221029A: Fermi GBM Final Localization DATE: 22/10/31 13:42:50 GMT FROM: Joe Mangan at UCD joseph.mangan@ucdconnect.ie
The Fermi GBM team reports the detection of a likely Long GRB.
"At 01:05:27.31 UT on 29 October 2022, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB221029A (trigger 688698332 / 221029045).
The on-ground calculated location, using the GBM trigger data, is RA = 53.3, DEC = -44.9 (J2000 degrees, equivalent to 3h 33m, -44d 54'), with a statistical uncertainty of 1 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a core-plus-tail model, with 90% of GRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg systematic error. [Connaughton et al. 2015, ApJS, 216, 32] ).
The angle from the Fermi LAT boresight at the GBM trigger time is 72 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221029045/q...
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221029045/q...
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221029045/q...