[vsnet-grb-info 22400] GRB 190511A: en

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24499
SUBJECT: GRB 190511A: en 
DATE:    19/05/12 10:18:31 GMT
FROM:    Alberto J. Castro-Tirado at IAA-CSIC  <ajct at iaa.es>

Hola Alberto,

Han encontrado la contrapartida de este GRB, en coordenadas:

RA = 08:25:46.46
Dec = -20:15:33.4

estando en mag. 20 13 h después, con lo que tuvo que ser bastante
brillante.

Como fue a las 07:14:24.36 UT del 11 de mayo, igual lo tenemos
desde B3 (N. Zelanda). Si la cúpula estaba abierta y hacía buen
tiempo, claro.

Un abrazo desde Nanjing,

Alberto

El 2019-05-11 21:15, GCN Circulars escribió:
> TITLE:   GCN CIRCULAR
> NUMBER:  24483
> SUBJECT: GRB 190511A: Fermi-LAT detection
> DATE:    19/05/11 13:15:11 GMT
> FROM:    Magnus Axelsson at Stockholm U.  <magaxe at kth.se>
> 
> M. Axelsson (KTH and Stockholm Univ.), F. Longo (Univ. and INFN
> Trieste), M. Arimoto (Kanazawa Univ.) and F. Dirirsa (Univ. of
> Johannesburg) report on behalf of the Fermi-LAT team:
> 
> On May 11, 2019, Fermi-LAT detected high-energy emission from GRB
> 190511A, which was also detected by Fermi-GBM (trigger 579251669 /
> 190511302; GCN 24482) and Swift (GCNs 24472 and 24481).
> 
> The best LAT on-ground location is found to be
> 
> RA, Dec 126.36, -20.25 (degrees, J2000)
> 
> with an error radius of 0.2 deg (90% containment, statistical error 
> only).
> This was 24 deg from the LAT boresight at the time of the GBM trigger:
> 
> T0 =  07:14:24.36 UT.
> 
> The data from the Fermi-LAT show a significant increase in the event
> rate after the GBM trigger that is spatially correlated with the GBM
> emission with high significance and consistent with the Swift
> location.
> 
> The photon flux above 100 MeV in the time interval 0-1400s after the
> GBM trigger is 3.6e-6 ph/cm2/s.
> 
> The estimated photon index above 100 MeV is -2.0 +/- 0.2.
> 
> The Fermi-LAT point of contact for this burst is Feraol Dirirsa
> (fdirirsa at uj.ac.za<mailto:fdirirsa at uj.ac.za>).
> 
> The Fermi-LAT is a pair conversion telescope designed to cover the
> energy band from 20 MeV to greater than 300 GeV. It is the product of
> an international collaboration between NASA and DOE in the U.S. and
> many scientific institutions across France, Italy, Japan and Sweden.