| Autor: |
Penston, M. J., Penston, M. V., Sandage, A. R. |
| Zdroj: |
Publications of the Astronomical Society of the Pacific; December 1971, Vol. 83 Issue: 496 p783-783, 1p |
| Abstrakt: |
UBV photometry is listed for 59 stars near 18 quasars and two unidentified radio sources and for 54 stars near ten Seyfert and four N-type galaxies. Some of the stars are suitable for use as secondary photoelectric standards. Many are faint enough so as to avoid large coincidence corrections for pulse counting with large telescopes. In some fields, the sequences are extensive enough to be used for calibration of photographic monitoring programs. Finding charts are given for all listed stars. Key words: stellar photometry - quasars - Seyfert galaxies - N galaxies |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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