Share Email Print
cover

Proceedings Paper

Automatic NEAR-XGRS data processing system for rapid and precise GRB localizations with the interplanetary network
Author(s): Scott D. Barthelmy; Thomas L. Cline; P. Butterworth; David M. Palmer; Jacob I. Trombka; Timothy Patrick McClanahan; Richard H. Gold; Kevin C. Hurley
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The on-board flight software for the Near Earth Asteroid Rendezvous (NEAR) spacecraft was modified to produce continuous 1-sec sampled rate information from the shield of the x-ray and gamma ray spectrometer (XGRS) instrument. Since the XGRS shield can also detect gamma ray bursts (GRB), this rate information can be used in combination with the GRB detections by the Ulysses and near-Earth GRB instruments as part of the interplanetary network (IPN) to triangulate the source direction of GRBs. It is the long baseline of NEAR combined with the Ulysses baseline that makes small error box locations possible. We have developed an automated system to analyze the periodic telemetry dumps from the NEAR spacecraft. It extracts this new data type, scans the ate information for increases which are plausibly of GRB origin, and combines these with the GRB detections from the others spacecraft. Because the processing is automated, the time delay to produce the triangulated positions is kept to a minimum, up to 48 hours. This automated processing and distribution of the GRB locations is done within the GRB Coordinates Network system. About 60 locations per year with errors ranging from a few to tens of arcminutes are expected. These rapid precise localizations may provide about 10 times the rate currently provided by the WFC and NFI instruments on BeppoSAX.

Paper Details

Date Published: 19 October 1999
PDF: 7 pages
Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); doi: 10.1117/12.366611
Show Author Affiliations
Scott D. Barthelmy, NASA Goddard Space Flight Ctr. and Universities Space Research Association (United States)
Thomas L. Cline, NASA Goddard Space Flight Ctr. (United States)
P. Butterworth, NASA Goddard Space Flight Ctr. and Raytheon Systems Co. (United States)
David M. Palmer, NASA Goddard Space Flight Ctr. and Universities Space Research Association (United States)
Jacob I. Trombka, NASA Goddard Space Flight Ctr. (United States)
Timothy Patrick McClanahan, NASA Goddard Space Flight Ctr. (United States)
Richard H. Gold, Johns Hopkins Univ. (United States)
Kevin C. Hurley, Univ. of California/Berkeley (United States)


Published in SPIE Proceedings Vol. 3768:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics
Ralph B. James; Richard C. Schirato, Editor(s)

© SPIE. Terms of Use
Back to Top