J/ApJS/104/101 Far-UV stellar photometry (Schmidt & Carruthers 1996)
Far-ultraviolet stellar photometry: fields centered on Rho Ophiuchi and the
Galactic center
Schmidt E.G., Carruthers G.R.
<Astrophys. J. Suppl. Ser. 104, 101 (1996)>
=1996ApJS..104..101S 1996ApJS..104..101S
ADC_Keywords: Photometry, ultraviolet
Keywords: Galaxy: center - ISM: individual (Rho Ophiuchi) -
stars: fundamental parameters - surveys - ultraviolet: stars
Abstract:
Far-ultraviolet photometry is presented for 121 objects in a 20deg
diameter field centered on Rho Oph and for 649 objects in a field
covering the Galactic center. Broadband magnitudes with effective
wavelengths of 1375A and 1781A are given. The Galactic center field
overlaps two fields which were discussed in an earlier paper. Eighty-
eight percent of the ultraviolet objects in the Rho Oph field were
identified with visible stars using the SIMBAD database, while only 9%
of the objects are blends of early-type stars too close together to
separate with our resolution. The photometric calibration was studied
in detail, and corrections for nonlinearity were derived for the
fields analyzed earlier as well as those discussed here. For stars in
common between the Galactic center field and the previous fields, a
comparison of the magnitudes yielded estimates of the internal errors
of the magnitudes of sigma_1375=0.13mag and sigma_1781=0.21mag.
A collated list of stars in the fields covering the Galactic center
and incorporating the revised calibration is presented and compared
with the S201 data of the same region. The properties of the sample of
ultraviolet objects in the Rho Oph field are briefly commented upon.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 88 121 Ultraviolet objects in the rho Ophiuchi field
table3 87 649 Ultraviolet objects in the galactic center field
table5 82 1500 Collated list of objects from the Scorpius,
Sagittarius, and Galactic center fields
table5.fit 2880 50 FITS ASCII table version of table5
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Byte-per-byte Description of file: table2 table3 table5
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Bytes Format Units Label Explanations
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1- 4 I4 --- Star Star number
7- 8 I2 h RAh Right ascension (1950)
10- 11 I2 min RAm Right ascension (1950)
13- 14 I2 s RAs Right ascension (1950)
16 A1 --- DE- Declination sign
17- 18 I2 deg DEd Declination (1950)
20- 21 I2 arcmin DEm Declination (1950)
23- 27 F5.2 mag m1375 []? 137.5mm UV magnitude
30- 34 F5.2 mag m1781 []? 178.1mm UV magnitude
36- 46 A11 --- OptID Optical identification
49 A1 --- n_OptID [:ABabcdefgh] Note on Ident (1)
51- 55 F5.2 mag Vmag []? Visual or photographic magnitude
56 A1 --- n_Vmag [P] P if Vmag is a photographic magnitude
57- 62 F6.2 mag V-B []? V-B color
64- 88 A25 --- Sp Spectral type
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Note (1): In table2
A : There are five B stars within a few arcminutes of the ultraviolet
object in addition to HD 145502. However, all are of spectral
type B8 or B9 (as compared with B2 for HD 145502) and are
fainter. Hence, HD 145502 should be the source of most of the
ultraviolet flux.
B : The ultraviolet source is the hot, main-sequence companion of
Alpha Sco.
In table3
a: This object is an unresolved clump of star in the cluster Bochum 13
b: This object is an unresolved clump of stars in the cluster NGC 6383.
The magnitude and spectrum refer to the brightest star, HD 159176,
which should dominate the ultraviolet flux.
c: These objects are unresolved clumps of stars in the cluster NGC 6405
d: These objects are unresolved clumps of stars in the cluster NGC 6475
e: These objects are unresolved clumps of stars in the cluster NGC 6530
f: This object consists of a number of stars in the cluster NGC 6530,
but the ultraviolet is likely to be dominated by HD 164794 and
NGC 6530-9. The V magnitude is a combination of those two stars.
g: This object is an unresolved clump of stars in the cluster NGC 6531
h: This object is an unresolved group of stars in the cluster
Colinder 367. The magnitude and spectrum refer to HD 165921, which
should dominate the ultraviolet flux
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Origin:
Table 5 from AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 03-May-96
Table 2 and table 3 prepared via OCR at CDS [CDS] 17-Jun-97
History:
Table2 and Table3 added on 17 Jun 1997
(End) [CDS] 06-Sep-1996