A Southern Gamma-Ray Blazar Survey

Details A Southern Gamma-Ray Blazar Survey A Southern Gamma-Ray Blazar Survey

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..109r&link_type=abstract

NOAO Proposal ID #2005B-0109

Computer Science

Scientific paper

The GLAST (gamma)-ray mission (2007) should detect > 2000 blazars (FSRQ and BL Lacs) in its initial sky survey. High redshift FSRQ are particularly interesting since they can be used to probe the nature of the jet emission and, through absorption of (gamma)-rays by the EBL, to study the onset of star formation. However existing blazar catalogs contain only a few hundred sources likely to be detected by GLAST and many of these are low-z BL Lacs. We have used radio and X-ray catalogs to select an all-sky sample of blazar candidates like the EGRET gamma-ray sources. Optical spectroscopy of Northern sources shows excellent success, confirming that over 95% are blazars and ~85% are FSRQ, and detecting blazars as distant as z=5.5. We propose here observations contributing to identification of the Southern sample. Here we concentrate on -40< DEC sources, proposing low resolution 1.5m RC spectroscopy of the brightest sources and 4m Goodman HTS spectroscopy to identify a significant fraction of the fainter candidates. These data will also set the scope for completion of the identifications in preparation for GLAST.

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