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Titolo:
HUBBLE-SPACE-TELESCOPE IMAGING OF THE OPTICAL TRANSIENT ASSOCIATED WITH GRB-970508
Autore:
PIAN E; FRUCHTER AS; BERGERON LE; THORSETT SE; FRONTERA E; TAVANI M; COSTA E; FEROCI M; HALPERN J; LUCAS RA; NICASTRO L; PALAZZI E; PIRO L; SPARKS W; CASTROTIRADO AJ; GULL T; HURLEY K; PEDERSEN H;
Indirizzi:
CNR,IST TECNOL & STUDIO RADIAZIONI EXTRATERR,VIA GOBETTI 101 I-40129 BOLOGNA ITALY SPACE TELESCOPE SCI INST BALTIMORE MD 21218 PRINCETON UNIV,JOSEPH HENRY LABS,DEPT PHYS PRINCETON NJ 08544 UNIV FERRARA,DIPARTMENTO FIS I-44100 FERRARA ITALY COLUMBIA UNIV,COLUMBIA ASTROPHYS LAB NEW YORK NY 10027 CNR,IST FIS COSM I-20133 MILAN ITALY CNR,IST ASTROFIS SPAZIALE I-00044 FRASCATI ITALY INST NACL INVEST AGR,LAB ASTROFIS ESPACIAL & FIS FUNDAMENTAL E-28080 MADRID SPAIN NASA,GODDARD SPACE FLIGHT CTR GREENBELT MD 20071 UNIV CALIF BERKELEY,SPACE SCI LAB BERKELEY CA 94720 COPENHAGEN UNIV OBSERV DK-2100 COPENHAGEN DENMARK
Titolo Testata:
The Astrophysical journal
fascicolo: 2, volume: 492, anno: 1998,
parte:, 2
pagine: 103 -
SICI:
0004-637X(1998)492:2<103:HIOTOT>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAMMA-RAY BURSTS; BLACK-HOLES; LUMINOSITY; STARS;
Keywords:
COSMOLOGY, OBSERVATIONS; GALAXIES, STARBURST; GAMMA RAYS, BURSTS; STARS, FORMATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
E. Pian et al., "HUBBLE-SPACE-TELESCOPE IMAGING OF THE OPTICAL TRANSIENT ASSOCIATED WITH GRB-970508", The Astrophysical journal, 492(2), 1998, pp. 103

Abstract

We report on Hubble Space Telescope observations of the optical transient (OT) discovered in the error box of the gamma-ray burst GRB 970508. The object was imaged on 1997 June 2 with the Space Telescope Imaging Spectrograph and Near-Infrared Camera and Multiobject Spectrometer. The observations reveal a pointlike source with R = 23.1 +/- 0.2 and H = 20.6 +/- 0.3, in agreement with the power-law temporal decay seen in groundbased monitoring. Unlike the case of GRB 970228, no nebulosity is detected surrounding the OT of GRB 970508. We set very conservative upper limits of R similar to 24.5 and H similar to 22.2 on the brightness of any underlying extended source. If this subtends a substantial fraction of an arcsecond, then the R-band limit is similar to 25.5. In combination with Keck spectra that show Mg I absorption and [O II]emission at a redshift of z = 0.835, om observations suggest that theOT is located in a star-forming galaxy with total luminosity 1 order of magnitude lower than the knee of the galaxy luminosity function, L-. Such galaxies are now thought to harbor the majority of star formation at z similar to 1; therefore, these observations may provide support for a link between GRBs and star formation.

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Documento generato il 18/11/17 alle ore 03:38:58