COMPTEL measurements of the gamma-ray burst GRB 930131

Ryan, J.; Bennett, K.; Collmar, W.; Connors, A.; Fishman, G. J.; Greiner, J.; Hanlon, L.; Hermsen, W.; Kippen, R. M.; Kouveliotou, C.; Kuiper, L.; Lichti, G.; Macri, J.; Mattox, J. R.; McConnell, Mark L.; McNamara, B.; Meegan, C.; Schöenfelder, V.; Dijk, R. van; Varendorff, M.; Webber, W. R.; Winkler, C.

doi:10.1086/187214

Cited by 19 publications

(10 citation statements)

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“…In Figure 3, we present the resulting BATSE spectra for 4 different times. The lightcurve of GRB 930131, as amply documented in the literature (Kouveliotou et al 1994;Ryan et al 1994;Sommer et al 1994), shows a sharp, intense first pulse, lasting for ∼ 0.06 s after the BATSE trigger, followed by a second, less intense and less sharp pulse, lasting from ∼ 0.75 s to ∼ 1.00 s after the trigger. In between, the "interpulse" region of Figure 3, there is significant yet faint flux.…”

Section: Spectral Evolutionmentioning

confidence: 59%

“…The COMPTEL and EGRET spectra have previously been published (Ryan et al 1994, andSommer et al 1994, respectively) and we refer the reader to these papers for details. We have chosen to work with the spectrum reported by the EGRET Total Absorption Shower Counter (TASC), since the EGRET spark chamber is too severely affected by deadtime effects.…”

Section: Comptel and Egret Spectramentioning

confidence: 99%

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The Spectrum of GRB 930131 (“Superbowl Burst”) from 20 keV to 200 MeV

Schaefer

1999

ApJ

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We have constructed a broad-band spectrum for GRB 930131 (the "Superbowl Burst"), ranging from 20 keV to 200 MeV, by combining spectral information from the Gamma Ray Observatory's BATSE, COMPTEL and EGRET instruments. We present general methods for combining spectra from different time intervals obtained by the same instrument as well as for combining spectra from the same time interval taken by different instruments. The resulting spectrum is remarkably flat (in νF ν -space) up to high energies. We find that the spectral shape can be successfully fitted by the shocked synchrotron emission model of Tavani. We present evidence that the flatness of the spectrum at high energies is not due to spectral time-variability.

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Section: Spectral Evolutionmentioning

confidence: 59%

Section: Comptel and Egret Spectramentioning

confidence: 99%

The Spectrum of GRB 930131 (“Superbowl Burst”) from 20 keV to 200 MeV

Schaefer

1999

ApJ

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“…Statistical uncertainty regions around the most probable burst locations have been estimated by computing smoothed (cubic spline) contours of the MLR sky-maps at levels corresponding 8,9,10,15,16,18,22,23,24,25 GRB 930309 2228 9055 11269.8 43 29.9 100.2 322.7 +55.2 96.9 +2.8 0.74 8,11,15,18,22,23,24,25 GRB 930612 2387 Bennett et al 1993;(12) Ryan et al 1994a;(13) Kippen et al 1994a;(14) Kippen et al 1994b;(15) Kippen et al 1994c;(16) Ryan et al 1994b;(17) Hanlon et al 1994;(18) Kippen et al 1995a;(19) Kippen et al 1995b;(20) Greiner et al 1995;(21) Winkler et al 1995;(22) Kippen et al 1995c;(23) Kippen et al 1995d;(24) Kippen et al 1995e;(25) Kippen et al 1996b.…”

Section: Comptel Gamma-ray Burst Location Catalogmentioning

confidence: 99%

The Locations of Gamma‐Ray Bursts Measured by COMPTEL

Kippen

Ryan

Connors

et al. 1998

ApJ

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The COMPTEL instrument on the Compton Gamma Ray Observatory is used to measure the locations of gamma-ray bursts through direct imaging of MeV photons. In a comprehensive search, we have detected and localized 29 bursts observed between 1991 April 19 and 1995 May 31. The average location accuracy of these events is 1.25 • (1σ), including a systematic error of ∼0.5 • , which is verified through comparison with Interplanetary Network (IPN) timing annuli. The combination of COMPTEL and IPN measurements results in locations for 26 of the bursts with an average "error box" area of only ∼0.3 deg 2 (1σ). We find that the angular distribution of COMPTEL burst locations is consistent with large-scale isotropy and that there is no statistically significant evidence of small-angle auto-correlations. We conclude that there is no compelling evidence for burst repetition since no more than two of the events (or ∼7% of the 29 bursts) could possibly have come from the same source. We also find that there is no significant correlation between the burst locations and either Abell clusters of galaxies or radio-quiet quasars. Agreement between individual COMPTEL locations and IPN annuli places a lower limit of ∼100 AU (95% confidence) on the distance to the stronger bursts.

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“…On the basis of these measurements the delay of X-ray radiation relative to GRB can be estimated as several sec. The comparison of GRB 930131 measurements by the COMPTEL instrument (0.7-20 OeV) and BATSE (20 keV-1.2 OeV) shows the 0.1 s delay of GRB as recorded by BATSE (Ryan et al 1994). For one of most powerful GRB 830801.b-the flux from which in the range of 0.03-7.5 OeV is estimated as ≥ 2 · 10 3 erg/cm 2 -the hard radiation of 1450-2500 keV appears with 1 s outstripping of soft radiation of 165-255 keV (Kuznetsov et al 1986).…”

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confidence: 94%

United classification of cosmic gamma-ray bursts and their counterparts

Кузнецов¹

2008

Astrophys Space Sci

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United classification of gamma-ray bursts and their counterparts is established on the basis of measured characteristics: photon energy E and emission duration T. The founded interrelation between the mentioned characteristics of events consists in that, as the energy increases, the duration decreases (and vice versa). The given interrelation reflects the nature of the phenomenon and forms the E-T diagram, which represents a natural classification of all observed events in the energy range from 10E9 to 10E-6 eV and in the corresponding interval of durations from about 10E-2 up to 10E8 s. The proposed classification results in the consequences, which are principal for the theory and practical study of the phenomenon.Comment: Keywords Gamma rays: burst

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COMPTEL measurements of the gamma-ray burst GRB 930131

Cited by 19 publications

References 0 publications

The Spectrum of GRB 930131 (“Superbowl Burst”) from 20 keV to 200 MeV

The Spectrum of GRB 930131 (“Superbowl Burst”) from 20 keV to 200 MeV

The Locations of Gamma‐Ray Bursts Measured by COMPTEL

United classification of cosmic gamma-ray bursts and their counterparts

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