Follow up ability for GRB observations on Swift

McLean, K. and Fenimore, E. and Palmer, D. and Barthelmy, S. and Gehrels, N. and Krimm, H. and Markwardt, C. and Parsons, A. and Tueller, J. and Stephens, M. (2005) Follow up ability for GRB observations on Swift. Il nuovo cimento C, 28 (4\5). pp. 837-840. ISSN 1826-9885

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Swift is the first satellite to autonomously select its own targets and slew to them. To test the ability of the narrow field of view instruments (NFIs) to follow up gamma ray burst (GRB) triggers, we simulate a series of randomly positioned bursts. This allows us to explore how the follow up observations of the NFIs will proceed. Each located burst in the simulation is followed by four hours without bursts, to allow for the NFIs to follow up the GRB triggers. We simulated 50 bursts that were triggered and located by the Burst Alert Telescope (BAT) and observed by the NFIs to probe the follow up parameter space. The discovery orbit (when the burst is first observed after the trigger) has NFI observation durations that are random in duration, while the average observation per full-orbit (the orbits after the discovery orbit) is approximately 2500 seconds, which would then take four full orbits to fulfill the autonomous observation requirement. The NFI observations can only begin afterSwift has settled on the GRB’s location, which takes about a hundred seconds. This average hundred seconds limits to rapid follow up observations by the NFIs, leaving the earliest optical observations to ground-based robotic telescopes.

Item Type: Article
Additional Information: Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004.
Uncontrolled Keywords: γ-ray sources, γ-ray bursts
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 18 Mar 2020 11:23
Last Modified: 18 Mar 2020 11:23

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