High-energy gamma rays from the intense 1993 January 31 gamma-ray burst

Sommer, M.; Bertsch, D. L.; Dingus, B. L.; Fichtel, C. E.; Fishman, G. J.; Harding, A. K.; Hartman, R. C.; Hunter, S. D.; Hurley, K.; Kanbach, G.; Kniffen, D. A.; Kouveliotou, C.; Lin, Y. C.; Mattox, J. R.; Mayer‐Hasselwander, H. A.; Michelson, P. F.; Montigny, C. von; Nolan, P. L.; Schneid, E. J.; Sreekumar, P.; Thompson, D. J.

doi:10.1086/187213

Cited by 127 publications

(93 citation statements)

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“…Emission above 100 MeV was detected in five cases: GRBs 910503, 910601, 930131, 940217, and 940301 (Dingus 1995). One of these sources, GRB 930131, had high-energy emission that was consistent with an extrapolation from its spectrum obtained with BATSE between 25 keV and 4 MeV (Sommer et al 1994). In contrast, evidence for an additional high-energy component up to 200 MeV with a different temporal behavior to the low-energy component was discovered in GRB 941017 (in EGRET's calorimeter, the Total Absorption Shower Counter; Gonzalez et al 2003).…”

Section: Introductionsupporting

confidence: 70%

FERMIOBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C

Abdo

Ackermann

Asano

et al. 2009

ApJ

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The Fermi Gamma-ray Space Telescope has opened a new high-energy window in the study of gamma-ray bursts (GRBs). Here we present a thorough analysis of GRB 080825C, which triggered the Fermi Gamma-ray Burst Monitor (GBM), and was the first firm detection of a GRB by the Fermi Large Area Telescope (LAT). We discuss the LAT event selections, background estimation, significance calculations, and localization for Fermi GRBs in general and GRB 080825C in particular. We show the results of temporal and time-resolved spectral analysis of the GBM and LAT data. We also present some theoretical interpretation of GRB 080825C observations as well as some common features observed in other LAT GRBs.

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Section: Introductionsupporting

confidence: 70%

FERMIOBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C

Abdo

Ackermann

Asano

et al. 2009

ApJ

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“…In particular, the MCAL upper limit is 4 × 10 −6 erg cm −2 (in agreement with the measurement in the 0.1−1 MeV energy band by Suzaku, see Endo et al 2007), a value significantly smaller than the fluence measured by BATSE for the GRBs detected by EGRET. Above 100 MeV, our upper limit of 0.02 ph cm −2 on the gamma-ray fluence compares to the fluence (>100 MeV) of the brightest bursts seen with EGRET: ∼0.039 ph cm −2 for GRB 930131 (Sommer et al 1994) and ∼0.015 ph cm −2 for GRB 940217 (Hurley et al 1994).…”

Section: Discussionsupporting

confidence: 43%

“…EGRET imaged high energy photons associated with only five GRBs, also detected by BATSE (Kwok et al 1993;Hurley et al 1994;Sommer et al 1994;Schneid et al 1995). One other candidate was found by an independent search (Jones et al 1996).…”

Section: Discussionmentioning

confidence: 99%

GRB 070724B: the first gamma ray burst localized by SuperAGILE and its Swift X-ray afterglow

Monte¹,

Feroci²,

Pacciani³

et al. 2007

A&A

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GRB 070724B is the first gamma ray burst localized by SuperAGILE, the hard X-ray monitor aboard the AGILE satellite. The coordinates of the event were published ∼19 h after the trigger. The Swift X-Ray Telescope pointed at the SuperAGILE location and detected the X-ray afterglow inside the SuperAGILE error circle. The AGILE gamma-ray Tracker and Minicalorimeter did not detect any significant gamma ray emission associated with GRB 070724B in the MeV and GeV range, neither prompt nor delayed. Searches for the optical afterglow were performed by the Swift UVOT and the Palomar automated 60-inch telescopes, resulting in no significant detection. Similarly, the Very Large Array did not detect any radio afterglow. This is the first GRB event associated with an X-ray afterglow with a firm upper limit in the 100 MeV−30 GeV energy range.

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“…A key result from E G R E T is that GRBs can have high energy > 100 MeV emission during the burst and extending for about an hour afterward [21][22][23]. The best example is shown in Figure 6 for GRB940217.…”

Section: High E N E R G Y G a M M A R A Y Emissionmentioning

confidence: 99%

Recent discoveries in gamma ray burst astronomy

Gehrels¹

1999

The 9th Astrophysics Conference: After the Dark Ages, When Galaxies Were Young (The Universe at 2

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Abstract. Gamma-ray bursts are among the most energetic explosions in the Universe, and yet their origin has been a mystery since they were discovered in 1973. Early instrumentation showed that the bursts have a huge variety of time profiles and are not associated with any bright or unusual steady sources at other wavelengths. The BATSE instrument on CGRO is more sensitive than any previous GRB detector and is providing a huge (> 2000) and uniform sample. From it we have learned that GRBs are isotropic on the sky and have an intensity distribution that flattens toward fainter bursts. Recently, tremendous progress has been made by measurements performed and enabled by the BeppoSAX mission. X-ray, optical and radio afterglow has been discovered for several bursts. From the accurate positions in these wavelength bands it has been possible to obtain redshifts for 3 bursts and to identify host galaxies for ,-, 10 bursts. From this we now know that most, if not all, GRBs are cosmological in origin with typical distances of ~ 2 Gpc (z ~ 1).

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High-energy gamma rays from the intense 1993 January 31 gamma-ray burst

Cited by 127 publications

References 0 publications

FERMIOBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C

FERMIOBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C

GRB 070724B: the first gamma ray burst localized by SuperAGILE and its Swift X-ray afterglow

Recent discoveries in gamma ray burst astronomy

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