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Revised and updated catalogue of Byurakan-IRAS stars
Context.Five lists of late-type stars were published in Astrophysics in1997-2001, found in the First Byurakan Survey low-dispersionspectroscopic plates as optical identifications of unidentified IRASsources. These identifications were carried out in the region withδ> +61° and |b|> 15 ° with a surface of 1504deg2. As a result, the catalogue of the Byurakan-IRAS Stars(BIS) was compiled. Its preliminary version has been available at theCDS since 2003.Aims.We revised and updated the BIS catalogue withthe new data from recently published optical and infrared catalogues togive access to all available data and make further comparative studiesof the properties of these objects possible.Methods.We madecross-correlations of the BIS catalogue with the MAPS, USNO-B1.0, and2MASS, added updated SIMBAD data for the BIS objects, and providedaccurate DSS1 and DSS2 positions and revised photometry. We also checkedthe objects for proper motion and variability. A refined classificationfrom low-dispersion spectra in the Digitized First Byurakan Survey(DFBS) was carried out.Results.The revised and updated catalogueof 276 Byurakan-IRAS stars (BIS) is presented.Conclusions.The BIScatalogue can be used to study a complete sample of IRAS-selected starsand to investigate individual objects.
| Optical Identifications of IRAS Point Sources Based on Low-Dispersion FBS Spectra. Stars. V
A fifth list of point sources from the IRAS Point Source Catalog (PSC)that are optically identified with stars of late spectral types isgiven. The list contains data on 75 objects. The identifications werebased on the Digital Sky Survey (DSS), the First Byurakan Survey, blueand red maps of the Palomar Observatory Sky Survey, and infrared fluxesat the wavelengths 12, 25, 60, and 100 m in the regions of +73°+80° and 03h30m 18h30m and of +80° ≤ +90° and 00h00m≤ α ≤ 20h00m. Of the 99 objects, which are given in theIRAS PSC as unidentified sources of infrared emission, 24 are associatedwith known stars in existing catalogs while 75 sources proved to beunknown in the optical range. The optical coordinates, their departuresfrom the IR coordinates, the V stellar magnitudes, the color indices CI,and the preliminary spectral subtypes have been determined. The objectshave optical magnitudes in the range of 6 m .5-17 m .2. Finder chartsfrom the DSS are given for the 69 new objects.
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Osservazione e dati astrometrici
| Costellazione: | Giraffa |
| Ascensione retta: | 12h03m21.16s |
| Declinazione: | +81°41'17.9" |
| Magnitudine apparente: | 7.516 |
| Distanza: | 289.017 parsec |
| Moto proprio RA: | 7 |
| Moto proprio Dec: | 3.1 |
| B-T magnitude: | 8.7 |
| V-T magnitude: | 7.614 |
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