Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-26
in "Gamma-Ray Burst and Afterglow Astronomy 2001", Ricker and Vanderspek (eds), AIP 662, pg 491, 2003
Astronomy and Astrophysics
Astrophysics
3 pages, no figures, from the "Gamma-Ray Burst and Afterglow Astronomy 2001" confernce, Woodshole, MA, Sept 2001
Scientific paper
10.1063/1.1579409
The Swift Burst Alert Telescope (BAT) is a huge (5200 cm2) coded aperture imager that will detect gamma-ray bursts in real time and provide a location that the Swift satellite will use to slew the optical and x-ray telescopes. The huge size of BAT is a challenge for the on-board triggering: a change as small as 1% is equivalent to a 1 sigma statistical variation in 1 second. There will be three types of triggers, two based on rates and one based on images. The first type of trigger is for short time scales (4 msec to 64 msec). These will be traditional triggers (single background) and we check about 25,000 combinations of time-energy-focal plane subregions per second. The second type of trigger will be similar to what is used on HETE: fits to multiple background regions to remove trends for time scales between 64 msec and 64 seconds. About 500 triggers will be checked per second. For these rate triggers, false triggers and variable non-GRB sources will be rejected by requiring a new source to be present in an image. The third type of trigger works on longer time scales (minutes), and will be based on routine images that are made of the field of view.
Barthelmy Scott
Fenimore Edward E.
Galassi Mark
Gehrels Neil
Palmer Dave
No associations
LandOfFree
The Trigger Algorithm for the Burst Alert Telescope on Swift does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Trigger Algorithm for the Burst Alert Telescope on Swift, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Trigger Algorithm for the Burst Alert Telescope on Swift will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-475955