J/A+AS/130/477 uvbyβ photometry in 3 EUV shadow directions (Knude 1998)
Stellar uvbyβ photometry in three EUV shadow directions
Knude J.
<Astron. Astrophys. Suppl. Ser. 130, 477 (1998)>
=1998A&AS..130..477K 1998A&AS..130..477K (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, uvby, beta ; Stars, distances
Keywords: stars: distances - solar neighbourhood - ISM: clouds
Abstract:
We present the uvbyβ data used to locate the dust and derive
distances for nearby diffuse interstellar clouds in the EUV shadows
lb27-31, lb165-32 and lb329+46 discovered by the Extreme Ultraviolet
Explorer. The photometrically derived parallaxes of our program stars
are compared to the parallaxes listed in the Hipparcos Catalog. Within
the photometric distance limit of 150pc, the photometric parallaxes of
21 ``normal" stars are consistent with the Hipparcos measurements
within an uncertainty of 15%. Much as expected for the Stroemgren
system. Since all program stars are brighter than V≃11.5 most of them
are included in the Tycho photometry. For our sample of ∼200 stars we
find Vby and VT to be consistent. Few stars are common to
published uvbyβ catalogs, ∼10, V and the indices compare well
apart from β where a zero point difference of 11mmag is noticed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 106 57 lb165-32 shadow direction
table2.dat 103 87 lb27-31 shadow direction
table3.dat 99 57 lb329+46 shadow direction
tables.tex 380 265 LaTeX version of the tables
tables.ps 72 1586 PostScript version of the tables
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See also:
I/146 : Positions and Proper Motions - North (Roeser+, 1988)
I/193 : Positions and Proper Motions - South (Bastian+ 1993)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- PPM ? PPM (Cat. I/146 & I/193) number
8- 17 A10 --- HD/BD HD (Cat. III/135) or BD (Cat. I/122) number
19- 29 A11 --- TYC Tycho (Cat. I/239) number
31- 32 I2 h RAh Right ascension (J2000.0)
34- 35 I2 min RAm Right ascension (J2000.0)
37- 41 F5.2 s RAs Right ascension (J2000.0)
43 A1 --- DE- Declination sign
44- 45 I2 deg DEd Declination (J2000.0)
47- 48 I2 arcmin DEm Declination (J2000.0)
50- 54 F5.2 arcsec DEs Declination (J2000.0)
56- 61 F6.3 mag Vmag V magnitude
63- 67 F5.3 mag b-y b-y colour index
69- 73 F5.3 mag m1 m1 colour index
75- 79 F5.3 mag c1 c1 colour index
81 I1 --- o_b-y Number of observations in ubvy
83- 87 F5.3 mag beta β colour index
89 I1 --- o_beta Number of observations in β
91-106 A16 --- Com Comments (1)
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Note (1): D: unresolved duplicity in Tycho (Cat. I/239) data
G: listed in GCVS (Cat. II/172)
R: weak indication of duplicity combined with indication of
variability in Tycho (Cat. I/239) data
S: suspected duplicity from Tycho (Cat. I/239) data
U: apparent variability
W: suspected variability
Stars without PPM, HD/DM or Tycho identification are listed by a
working number in this column
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Acknowledgements: J. Knude
Historical notes: Some errors where corrected on 22-Oct-1998
Table1.dat : PPM 93496 misprint for PPM 92496
Table2.dat : HD 198182 misprint for HD 198172
HD 238053 misprint for HD 198825
Table3.dat : PPM 282222 misprint for PPM 228222
(End) Patricia Bauer [CDS] 20-Mar-1998