AAS 205th Meeting, 9-13 January 2005
Session 160 GRBs: Observatories and Observations
Oral, Thursday, January 13, 2005, 10:00-11:30am, Pacific Salon 1

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[160.05] Imaging and surveying the Gamma-ray sky with BATSE and INTEGRAL

A. B. Hill (University of Southampton), A. J. Bird (University of Southampton and on behalf of the IBIS/ISGRI Survey Team), E. J. Barlow, A. J. Dean, S. E. Shaw, M. J. Westmore, D. R. Willis (University of Southampton)

The BATSE experiment aboard CGRO monitored the whole sky in the 20 keV - 2 MeV energy band continuously for 9 years, from April 1991 until June 2000. Application of the Earth Occultation technique and a Maximum-Likelihood imaging method have produced all-sky significance and flux maps with ~mCrab sensitivity. In addition, a non-linear CLEAN algorithm is applied to remove artefacts systematic of the Earth Occultation technique. The latest all-sky source maps and a summary of source detections are presented.

The INTEGRAL mission was launched October 17th 2002. The ISGRI detector of the IBIS imaging telescope is ideally suited to the detection and localization of soft Gamma-ray sources in the 15 keV - 1 MeV band. IBIS has a field of view of ~30 degrees and an angular resolution of 12'. All-sky mosaics are generated by the summation of individual science window images and can be further summed across energy bands. Results are presented based on data from the first 2 years of operations.

The long timescale of data from the BATSE experiment combined and contrasted with the vastly superior imaging and sensitivity capabilities of ISGRI present a wealth of data to explore the properties of sources across the whole sky in an energy regime which was last investigated by the HEAO 1 A4 experiment in 1979.

The author(s) of this abstract have provided an email address for comments about the abstract: abh@astro.soton.ac.uk

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© 2004. The American Astronomical Society.