HEAO 1 A2 Pointing Catalog Virtual Observatory Resource

Authors

1. HEASARC

Published by

NASA/GSFC HEASARC

Abstract

      The HEAO 1 A-2 Pointing Catalog of High-Energy X-ray Sources is the result of a study of selected targets using the three detectors of the A-2 Experiment. The detectors consisted of the HED (high energy detector) in the range 3-6 KeV, the MED (medium energy detector) in the range 1.5-15 KeV, and the LED (low energy detector) in the range 0.15-3 KeV. The HEAO A-2 Experiment was primarily designed for studying the diffuse X-ray background; however, it was also capable of studying point sources to good sensitivity. Thus, after several months of continuous scanning to survey 95% of the diffuse X-ray sky, the A-2 detectors began individual pointings at selected targets. The point maneuvers began on day 319, 15 November 1977 and ended on day 739, 9 January 1979. This is a service provided by NASA HEASARC .
    

Keywords

1. Observation

Bibliographic source

See also HTML

https://heasarc.gsfc.nasa.gov/W3Browse/all/a2point.html

IVOA Identifier IVOID

ivo://nasa.heasarc/a2point

Access

IVOA Cone Search SCS

For use with a cone search client (e.g., TOPCAT).
https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=a2point&

IVOA Table Access TAP

https://heasarc.gsfc.nasa.gov/xamin/vo/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

Web browser access HTML

https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_a2point&Action=More+Options&Action=Parameter+Search&ConeAdd=1