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Gamma Ray Burst Discoveries with the Swift Mission

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Gamma Ray Burst Discoveries with the Swift Mission. Neil Gehrels. NASA/GSFC. N2PS2 - GWU ... BAT, -rays 15-350 keV - XRT, X-rays, 0.2-10 keV - UVOT, opt, 170-650 nm ... – PowerPoint PPT presentation

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Title: Gamma Ray Burst Discoveries with the Swift Mission


1
Gamma Ray Burst Discoveries with the Swift Mission
Neil Gehrels NASA/GSFC N2PS2 - GWU June 16,
2008
2
Swift Mission NASA MIDEX
3 instruments - BAT, ?-rays 15-350 keV -
XRT, X-rays, 0.2-10 keV - UVOT, opt,
170-650 nm Rapid slewing spacecraft Launch
November 20, 2004
UVOT Position - lt 1 arcsec
XRT Position - 5 arcsec
BAT Position - 2 arcmin
.
Tlt10 sec
Tlt90 sec
Tlt2 min
3
(No Transcript)
4
Short GRBs NS-NS Mergers
Long GRBs Massive Star Core Collapse
GRB 050724 elliptical host
GRB 080319B "naked eye burst
Brightest objects in universe - 5.5 magnitude
_at_ 7.5 billion lt yrs
First afterglow and identification from Swift
Chandra
XRT
In star forming galaxies Accompanied by
supernae Collapsar model
In non-star forming galaxies No
supernovae Merger model
5
SN 2008D Shock Breakout
SN 2007uy
- XRT monitoring of NGC 2770 (27 Mpc)
revealed extremely luminous X-ray outburst - No
BAT detection (i.e., not a GRB) - UVOT
detection of SN rising 90 min later - Supernova
2008D - Shock breakout. May occur for all SN
9 Jan 2008
Soderberg et al. 2008
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