J/A+A/352/605 O & B stars uvby-Hbeta photometry. II. (Kaltcheva+, 1999)
Stroemgren and Hβ photometry of O and B type stars in star-forming regions.
II. Monoceros OB2, Canis Major OB1 and Collinder 121.
Kaltcheva N.T., Olsen E.H., Clausen J.V.
<Astron. Astrophys. 352, 605 (1999)>
=1999A&A...352..605K 1999A&A...352..605K (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, uvby, beta; Stars, early-type
Keywords: stars: early-type -
Galaxy: open clusters and associations: Mon OB2, CMa OB1, Col 121
Abstract:
Stroemgren and Hβ photometry of O and B type stars, generally
brighter than 10mag is presented for the fields of the galactic OB
associations Monoceros OB2, Canis Major OB1 and Collinder 121. The
observations are based on the PPM catalogue identifications and are
designed to improve the completeness of the existing uvbyβ data
for the bright early-type stars in these fields. We present new uvby
photometry for 343 stars and Hβ photometry for 213 of them. These
observations are part of our effort to study the structure of selected
star-forming regions in the Milky Way, utilizing uvbyβ
photometry.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 75 343 Star positions from Simbad database
table3.dat 72 343 uvby catalogue
table4.dat 30 213 Hbeta catalogue
--------------------------------------------------------------------------------
See also:
I/146 : Positions and Proper Motions - North (Roeser+, 1988)
I/193 : Positions and Proper Motions - South (Bastian+ 1993)
I/208 : The 90000 stars Supplement to the PPM Cat. (Roeser+, 1994)
J/A+A/352/600 : O & B stars uvby-Hbeta photometry. I. (Kaltcheva+, 1999)
J/A+AS/146/365 : O + B stars uvby-Hbeta photometry. III. (Kaltcheva+, 2000)
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 10 F4.1 s RAs Right ascension (J2000.0)
12 A1 --- DE- Declination sign (J2000.0)
13- 14 I2 deg DEd Declination (J2000.0)
16- 17 I2 arcmin DEm Declination (J2000.0)
19- 20 I2 arcsec DEs Declination (J2000.0)
23- 28 I6 --- PPM PPM (Cat. I/146 & I/193) designation
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- PPM PPM (Cat. I/146 & I/193) number
8- 13 F6.3 mag Vmag Magnitude transformed to the standard
Johnson V magnitude
15- 19 F5.3 mag e_Vmag rms uncertainty on Vmag (1)
21- 26 F6.3 mag (b-y) Stroemgren colour index
28- 32 F5.3 mag e_(b-y) rms uncertainty on (b-y) (1)
34- 39 F6.3 mag m1 m1 = (v-b) - (b-y) colour index
41- 45 F5.3 mag e_m1 rms uncertainty on m1 (1)
47- 52 F6.3 mag c1 c1 = (u-v) - (v-b) colour index
54- 58 F5.3 mag e_c1 rms uncertainty on c1 (1)
60 I1 --- w_Vmag Weight of Vmag
62 I1 --- w_m1 Weight of 4-colour indices
64 I1 --- o_Vmag Number of the nights for each star
66- 73 A8 --- Field The field where the star is located
--------------------------------------------------------------------------------
Note (1): Internal rms errors of one observation (weight 1)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- PPM PPM (Cat. I/146 & I/193) number
8- 12 F5.3 mag Hbeta Hβ index
14- 18 F5.3 mag e_Hbeta Internal rms errors of one observation
(weight 1) on Hβ index
20 I1 --- w_Hbeta Weight of Hβ index
22 I1 --- o_Hbeta Number of the nights for each star
24- 31 A8 --- Field The field where the star is located
--------------------------------------------------------------------------------
Acknowledgements: Nadia Kaltcheva
(End) Patricia Bauer [CDS] 10-Dec-1999