Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.227..563l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 227, Aug. 1, 1987, p. 563-588.
Astronomy and Astrophysics
Astronomy
22
Infrared Astronomy Satellite, Infrared Sources (Astronomy), Point Sources, Virgo Galactic Cluster, Data Bases, Galaxies, Identifying, Infrared Stars
Scientific paper
Optical identifications are given for 199 of the 206 point sources detected by the Infrared Astronomical Satellite (IRAS) in a 113 deg2 area centred on the Virgo Cluster. The identifications are made using four deep IIIa-J plates taken with the 1.2-m UK Schmidt Telescope. Fifty-four of the sources are associated with stars, 113 with optically bright (Bj < 16) galaxies, 32 with faint (Bj > 16) galaxies, and seven are apparently empty fields, to the plate limit of B = 22. This area is affected by infrared cirrus, with which five of the seven empty fields are associated. The authors have created an infrared-optical Virgo galaxy database, complete to about B = 16, by combining their data with the catalogue of Binggeli, Sandage & Tammann. The authors find that the infrared properties of the Virgo cluster galaxies are indistinguishable from those of field galaxies at similar redshifts.
Clowes Roger G.
Kalafi M.
Leggett Sandy K.
MacGillivray Harvey T.
Puxley Phil J.
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