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TITLE:   GCN CIRCULAR
NUMBER:  25173
SUBJECT: GRB 190727A: Fermi GBM Final Real-time Localization
DATE:    19/07/27 16:13:30 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 16:01:52 UT on 27 Jul 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190727A (trigger 585936117.276574 / 190727668).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 224.5, Dec = 19.4 (J2000 degrees, equivalent to J2000 14h 58m, 19d 23'), with a statistical uncertainty of 1.0 degrees.

The angle from the Fermi LAT boresight is 20.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190727668/quicklook/glg_skymap_all_bn190727668.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190727668/quicklook/glg_healpix_all_bn190727668.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190727668/quicklook/glg_lc_medres34_bn190727668.gif

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TITLE:   GCN CIRCULAR
NUMBER:  25175
SUBJECT: GRB 190727A: BALROG localization (Fermi Trigger 585936117 / GRB 190727668)
DATE:    19/07/27 16:23:03 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg@mpe.mpg.de>

F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
585936117 at 16:01:52 on 27 July 2019 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 232.3+/-2.0 deg
Decl.(2000.0) = 20.9+/-2.1 deg
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB190727668/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB190727668/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB190727668/json