2001A&A...378..441F


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.13CET14:42:00

2001A&A...378..441F - Astronomy and Astrophysics, volume 378, 441-448 (2001/11-1)

GRB 990704: The most X-ray rich BeppoSAX gamma-ray burst.

FEROCI M., ANTONELLI L.A., SOFFITTA P., IN'T ZAND J.J.M., AMATI L., COSTA E., PIRO L., FRONTERA F., PIAN E., HEISE J. and NICASTRO L.

Abstract (from CDS):

We present the X- and γ-ray detection of GRB 990704 and the discovery and study of its X-ray afterglow, 1SAX J1219.5-0350. Two pointed BeppoSAX observations with the narrow field instruments were performed on this source, separated in time by one week. The decay of the X-ray flux within the first observation appears unusually slow, being best-fit by a power law with negative index 0.83±0.16. Such a slow decay is consistent with the non-detection in our second observation, but its back-extrapolation to the time of the GRB largely underestimates the detected GRB X-ray prompt emission. In addition, the GRB prompt event shows, among the BeppoSAX-WFC detected sample, unprecedentedly high ratios of X- and gamma-ray peak fluxes (F2–10keV/F40–700keV∼0.6, and F2–26keV/F40–700keV∼1.6) and fluences (S2–10keV/S40–700keV∼1.5 and S2–26keV/S40–700keV∼2.8), making it, among the BeppoSAX arcminute-localized GRBs, the closest to the recently discovered class of Fast X-ray Transients.

Abstract Copyright:

Journal keyword(s): gamma-rays: bursts - stars: individual: 1SAX J1219.5-0350

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 GRB 970228 gB 05 01 46.7 +11 46 53           ~ 623 1
2 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 835 1
3 GRB 980326 gB 08 36 34.3 -18 51 24           ~ 255 0
4 GRB 990704 gB 12 19 27.3 -03 50 22           ~ 50 0
5 SAX J1219.5-0350 X 12 19 27.3 -03 50 22           ~ 3 0
6 GRB 970828 gB 18 08 31.6 +59 18 51           ~ 333 1
7 GRB 900901 gB 18 23.1 -44 46           ~ 3 0
8 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1616 2
9 GRB 990712 gB 22 31 53.061 -73 24 28.58           ~ 246 1
10 GRB 981226 gB 23 29 37.2 -23 55 54           ~ 99 1

    Equat.    Gal    SGal    Ecl

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2019.11.13-14:42:00

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