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Photoelectric H-beta photometry for A and F stars brighter than V = 14 M in four areas in directions towards the South Galactic Pole
Data from photoelectric H-beta observations of 145 mainly A and F starswith V = 14 mag or brighter in four regions totalling 60 sq deg andlocated near galactic latitude b(II) = -60 deg, obtained using atwo-channel H-beta photometer on the 1.5-m Danish reflecting telescopeat ESO on two nights in 1981 and four nights in 1982, are presented intables along with the Stromgren b magnitudes calculated from thewide-channel H-beta counts. These observations are undertaken in theframework of a uvby photometric search for A-F stars of Population IIbrighter than V = 15.5 mag. The mean error per observation is given as +or - 0.020 mag in b and + or - 0.009 mag in H-beta.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Irmak |
| Sað Açýklýk: | 02h59m08.41s |
| Yükselim: | -04°47'00.1" |
| Görünürdeki Parlaklýk: | 8.016 |
| Uzaklýk: | 208.768 parsek |
| özdevim Sað Açýklýk: | 2.7 |
| özdevim Yükselim: | -7.6 |
| B-T magnitude: | 8.045 |
| V-T magnitude: | 8.019 |
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