J/ApJS/96/605 Far UV Stellar Photometry (Schmidt+ 1995)
Far-Ultraviolet Stellar Photometry: Fields in Sagittarius and Scorpius Schmidt E.G., Carruthers G.R. <Astrophys. J. Suppl. Ser. 96, 605 (1995)> =1995ApJS...96..605S
ADC_Keywords: Photometry, ultraviolet ; Stars, early-type Keywords: stars: early-type -- surveys -- techniques: photometric -- ultraviolet: stars Abstract: Far-ultraviolet photometry for 741 objects in a field in Sagittarius centered near M8 and 541 objects in a field centered near zeta Scorpii is presented. These data were extracted from electrographic images obtained with two cameras during a shuttle flight in 1991 April/May. The cameras provided band passes with lambda_eff = 1375 A and lambda_eff = 1781 A. Synthetic colors show that these bands are sensitive to effective temperature for hot stars. Our measurements were placed on a quantitative far-ultraviolet magnitude scale by convolving the spectra of stars observed by IUE with our cameras' spectral response functions. Fifty-eight percent of the ultraviolet objects were identified with visible stars using the SIMBAD database while another 40% of the objects are blends of early type stars too close together to separate with our resolution. Our photometry is compared with that from the TD-1, OAO 2, and ANS satellites and the S201 (Apollo 16) far-ultraviolet camera and found to agree at the level of a few tenths of a magnitude. Unlike previous studies, almost half of the identified visual counterparts to the ultraviolet objects are early B stars. A plot of distance modulus against ultraviolet color excess reveals a significant population of stars with strong ultraviolet excesses. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4 74 740 *Ultraviolet objects in the M8 field table5 74 541 *Ultraviolet objects in the zeta Sco field
Note on table4, table5: in the printed paper, the right ascensions are wrong by 10 hours. The error was corrected in the electronic tables.
Byte-by-byte Description of file: table4 table5
Bytes Format Units Label Explanations
1- 4 I4 --- Star Star number 6- 7 I2 h RAh *Right ascension (1950) 9- 10 I2 min RAm R.A. 12- 13 I2 s RAs R.A. 15 A1 --- DE- Declination sign 16- 17 I2 deg DEd Declination (1950) 19- 20 I2 arcmin DEm Dec. 22- 26 F5.2 mag m1375 ? Magnitude at 1375 Angstroems 28- 33 F6.2 mag m1781 ? Magnitude at 1781 Angstroems 36- 47 A12 --- ID Identification 50- 54 F5.2 mag Mag ? V or ptg. magnitude from SIMBAD 55 A1 --- n_Mag [P] 'P' when Mag is photographic 57- 74 A18 --- Sp Spectral type
Note on RAh: the printed values are all missing the '1' (e.g. ' 7' instead of '17')
Origin: AAS CD-ROM series, Volume 4, 1995 Lee Brotzman [ADS] 08-May-95 Historical Notes: * 12-Jul-1995: The original tables 4 and 5 where modified at CDS to place the magnitude flag 'P' in a dedicated column. * 05-Nov-1996: The RAh values were discovered to be wrong by 10 hours at CDS; all RAh values were then changed.
(End) [CDS] 12-Jul-1995
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