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Optical identifications of the IRAS faint sources in the Virgo cluster area.
This paper presents a study on the deep optical identifications of 369IRAS faint sources in a 102 square degree area centered on the Virgocluster. We obtained the positions and magnitudes of candidates fromfour UK Schmidt Telescope IIIa-J direct plates. 89 (24%) are identifiedas stars and 276 (75%) as galaxies. There are 4 (1%) empty fields to theplate limit of B=~22. The infrared-optical database for 193 FSC-onlysources is given. Most of the IRAS galaxy sources are spirals. There are83 IRAS galaxy sources being regarded as the cluster members by Binggeliet al. (1985). In our sample, a correlation between the luminosity ratioL_IR_/L_B_ and the infrared flux ratio F(100μm)/F(60μm) isevident. For the member galaxies, a weak correlation between L_IR_/L_B_and L_IR_ is also found.
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Observation and Astrometry data
| Constellation: | おとめ座 |
| Right ascension: | 12h37m22.14s |
| Declination: | +12°59'01.0" |
| Apparent magnitude: | 8.208 |
| Distance: | 641.026 parsecs |
| Proper motion RA: | -19.6 |
| Proper motion Dec: | 4.4 |
| B-T magnitude: | 9.354 |
| V-T magnitude: | 8.303 |
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