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Intermediate-Brightness Spectrophotometric Standards. Standards Near +40° Declination
The second stage in our program to compile a list of regionalintermediate-brightness spectrophotometric standards has been completed.We have obtained spectral energy distributions for 24 stars withmagnitudes near +40° declination. The range λλ31007600 Å was studied with a spectral resolution of 50 Å. Therelative rms error of our results in the visible is 1 2%, increasing to3 5% toward the edges of the studied wavelength interval. All the starsare referenced to a single standard, the circumpolar star HD 221525. Theenergy distributions were used to compute color indices in the UBV,WBVR, and UPXY ZV S systems, as well as in the system of the TYCHOcatalog. The computed and observed values for stars in common with theTYCHO catalog are compared.
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Osservazione e dati astrometrici
| Costellazione: | Andromeda |
| Ascensione retta: | 00h50m26.60s |
| Declinazione: | +40°48'29.7" |
| Magnitudine apparente: | 8.131 |
| Distanza: | 680.272 parsec |
| Moto proprio RA: | 7 |
| Moto proprio Dec: | -3 |
| B-T magnitude: | 8.093 |
| V-T magnitude: | 8.128 |
Cataloghi e designazioni:
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