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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4 74 740 *Ultraviolet objects in the M8 field
table5 74 541 *Ultraviolet objects in the zeta Sco field
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Note on table4, table5: in the printed paper,
the right ascensions are wrong by 10 hours.
The error was corrected in the electronic tables.
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Byte-by-byte Description of file: table4 table5
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Bytes Format Units Label Explanations
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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
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Note on RAh: the printed values are all missing the '1'
(e.g. ' 7' instead of '17')
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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