OSTARS - Galactic O Stars Catalog
This database table is based upon the information contained in the
Catalog of Galactic O-Type Stars (Garmany, Conti, and Chiosi 1982), which is a
compilation from the literature of all O-type stars for which spectral types,
luminosity classes, and UBV photometry exist. Most of the entries come from
Cruz-Gonzalez, et al. (1974) and Humphreys (1978), with additional stars
from Garrison and Kormendy (1976); Garrison, Hiltner, and Schild (1977);
Garrison and Schild (1979); Feinstein, Marraco, and Muzzio (1973); Feinstein,
Marraco, and Forte (1976); and Moffat, Fitzgerald, and Jackson (1979).
As discussed below, the HEASARC has deleted 5 of the original 765 entries
which we believe to be erroneous and/or redundant, and modified the names
and/or positions of 14 other entries. As part of the checking process,
the HEASARC created new, more accurate positions for all the entries using the
The catalog contains 760 stars, for each of which designations (HD, DM,
etc.), spectral types, V magnitudes, B-V magnitudes, cluster memberships,
positional information, and source references are given. In addition, the
authors have included derived values of absolute visual and bolometric
magnitudes, and distances. The source reference should be consulted for
additional details concerning the derived quantities.
The Catalog of Galactic O-Type Stars (Garmany, Conti, and Chiosi 1982).
The HEASARC created the equatorial coordinates in this table by querying
SIMBAD. The Galactic coordinates were then computed from these. The Galactic
positions given in the original catalog were converted to J2000 equatorial
coordinates and are stored in the `RA_Old` and `Dec_Old` parameters. The
angular separation between these positions were calculated for each entry
and is listed in the `Position_Offset` parameter.
Of the original 765 entries, the HEASARC has deleted 5 entries which we believe
to be erroneous and/or redundant and modified the names of 2 other stars to
correct typographical errors in the original table. The deleted stars (and
their probable duplicates) are BD -23 3843 (BD +24 3843), HD 155220
(HD 152590), HD 206183 (appears twice in original catalog),
HD 216522 (HD 216532), and HD 216878 (HD 216898). The renamed stars are
BD +41 3689 (renamed from BD +41 368) and CPD -61 3452 (was CD -61 3452).
The SIMBAD-compatible source designation.
The source designation from the original catalog.
The Right Ascension of the object, as resolved by SIMBAD.
The Declination of the object, as resolved by SIMBAD.
The Galactic longitude of the object, based on the SIMBAD position.
The Galactic latitude of the object, based on the SIMBAD position.
The Right Ascension of the object, as computed from the Galactic position
from the original catalog, in J2000 sexagesimal format.
The Declination of the object, as computed from the Galactic position from
the original catalog, in J2000 sexagesimal format.
The position offset between the SIMBAD position and the original catalog
position, in arcminutes.
Absolute bolometric magnitude M(bol), computed using Conti's (1975) temperature
scale and Morton's (1969) bolometric corrections as a function of temperature.
Absolute visual magnitude, M(V), taken from the primary source given in the
FLAGS parameter or from Conti's (1975) calibration of spectral type and M(V).
B-V magnitude, according to the coded documentation found in the FLAGS
Code for cluster or association membership, as listed below. Blank for
presumed field stars.
Code Group Code Group
1 Sgr OB1 43 NGC 2129
2 Sgr OB7 44 Gem OB1
3 Sgr OB4 45 Mon OB1
4 Sgr OB6 46 Ori OB1
5 Ser OB1 47 Mon OB2
6 Sct OB3 48 CMa OB1
7 Ser OB2, NGC 6604 49 Cr 121
8 Sct OB2 50 NGC 2414
9 Cr 359 51 NGC 2362
10 Vul OB1 52 NGC 2439
11 Vul OB4 53 Pup OB1
12 Cyg OB3 54 Vel OB1
13 Cyg OB1 55 Car OB1
14 Cyg OB8 56 TR 14
15 Cyg OB9 57 TR 15
16 Cyg OB2 58 TR 16
17 Cyg OB4 59 Cr 228
18 Cyg OB7 60 Car OB2
19 NGC 6991 61 NGC 3576
20 Lac OB1 62 NGC 3766
21 Cep OB2, TR 37 nucleus 63 Cru OB1
22 Cep OB1 64 Cen OB1
23 NGC 7235 65 R 80
24 Cep OB5 66 Pis 20
25 Cep OB3 67 Nor OB1
26 Cas OB2 68 NGC 6067
27 Cas OB5 69 R 103
28 Cep OB4 70 R 105
29 Cas OB4 71 Ara OB1a
30 Cas OB14 72 NGC 6204
31 Cas OB7 73 Ara OB1b
32 Cas OB1 74 Sco OB1
33 NGC 457 75 Sco OB2
34 Cas OB8 76 HD 156154 group
35 Per OB1 77 M 6
36 Cas OB6 78 Sgr OB5
37 Cam OB1 79 zeta Pup
38 Per OB3 80 BO 4&5
39 Cam OB3 81 NGC 3572
40 Per OB2 82 Hogg 10
41 Aur OB1 83 Lynga 14
42 Aur OB2 84 NGC 6322
Distance computed from star's distance modulus, assuming an interstellar
absorption of A(V)=3E(B-V). The units are kiloparsecs.
A string of four 1-digit integers giving codes for primary source, additional
cluster membership, additional spectral types, and additional photometry,
respectively. References for the codes are given below. Blank if not present.
Primary source (first number)
1 Cruz-Gonzalez et al. (1974).
2 Garrison, Hiltner and Schild (1977).
3 Humphreys (1978).
4 Garrison and Kormendy (1976).
Garrison and Schild (1979).
5 Feinstein, Marraco and Muzzio (1973).
Feinstein, Marraco and Forte (1976).
6 Moffat, Fitzgerald and Jackson (1979).
Additional cluster membership (second number)
1 Conti and Alschuler (1971).
2 Moffat and Vogt (1975).
3 Humphreys (1978).
Additional spectral types (third number)
2 Garrison, Hiltner and Schild (1977).
Additional photometry (fourth number)
4 Klare and Neckel (1977).
5 Feinstein, Marraco and Forte (1976).
6 Guetter (1974).
The spectral type of the source according to the documentation code found in the
A flag (K) if the spectral type given is new and based upon either 63 A
mm^-1 of 79 / mm^-1 spectra taken at Kitt Peak National Observatory. Otherwise,
blank if the spectral type is taken from the literature.
The photographic magnitude of the object.
Browse object classification. The classification is based on the `Spect_Type`
parameter, if one is available.
Questions regarding the OSTARS database table can be addressed to the
HEASARC User Hotline.
If you have any problems, please consult the help
page or mail email@example.com