1999ApJ...521L.117E

Query : 1999ApJ...521L.117E

1999ApJ...521L.117E - Astrophys. J., 521, L117-L120 (1999/August-3)

Shading and smothering of gamma-ray bursts.

EICHLER D. and LEVINSON A.

Abstract (from CDS):

GRB 980425 is distinctive in that it seems to be associated with SN 1998bw, has no X-ray afterglow, and has a rounded, structureless, single-peak light curve and a relatively soft spectrum. The supernova is itself unusual in that its expansion velocity exceeds c/6. We suggest that many of these features can be accounted for with the hypothesis that we observe the gamma-ray burst along a penumbral line of sight that contains mainly photons that have scattered off ejected baryons. The hypothesis suggests a baryon-poor jet existing within a baryon-rich outflow. The sharp distinction can be attributed to whether or not the magnetic field lines thread an event horizon. Such a configuration suggests that there will be some nonthermal acceleration of pickup ex-neutrons within the baryon-poor jet. This scenario might produce observable spallation products and neutrinos.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Bursts - Gamma Rays: Observations - Gamma Rays: Theory

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1928 2

Query : 1999ApJ...521L.117E

Basic data :
SN 1998bw -- SuperNova
Other object types: otypes_help 		gB (GRB,Trigger,...), SN* (2016ApJ,SN), V* (AAVSO)
ICRS coord. (ep=J2000) : 		19 35 03.17 -52 50 46.1 [ ] D 2008yCat.2283....0B
FK4 coord. (ep=B1950 eq=1950) : 		19 31 08.21 -52 57 22.2 [ ]
Gal coord. (ep=J2000) : 		344.99305 -27.71686 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 2537 [~] / z(~) 0.0085 [~] / cz 2548 [~]
   D 1998IAUC.6896Q...1T
Spectral type: 		SNIc C 2008yCat....1.2024B
Fluxes (1) :
B 14.09 [~] D 2008yCat.2283....0B
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Hierarchy : number of linked objects
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Identifiers (6) :
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SN 1998bw Trigger 6707 [STK2001] 10928c
GRB 980425 XRF 980425 AAVSO 1927-53

References (1928 between 1850 and 2026) (Total 1928)
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