III/29 Catalog of Hγ measures (Petrie+ 1973)
A catalogue of Hγ measures
Petrie R.M., Crampton D., Leir A. Younger F.
<Publ. Dom. Astrophys. Obs. XIV, 151 (1973)>
=1973PDAO...14..151P 1973PDAO...14..151P
=2016yCat.3029....0P 2016yCat.3029....0P
ADC_Keywords: Equivalent widths ; Photometry, H-gamma
Abstract:
A catalogue of equivalent widths of Hγ measured by R.M. Petrie
in the spectra of 1171 stars is presented. The catalogue represents a
compilation of all the published and unpublished values available to
us. It is shown that no systematic differences exist between the
equivalent widths by Petrie and those currently being derived at
the Dominion Astrophysical Observatory.
Description:
The catalog is a compilation of equivalent widths of H-γ for
early-type stars, not only from published material but also from the
numerous card files kept by R.M. Petrie. The luminosities of
early-type stars through the measurement of the equivalent width of
H-γ are relatively precise, although the early work was hampered
by systematic errors in the absolute magnitude calibrations. In a
number of cases, the values of the equivalent width for a given star
differ slightly from publication to publication. There are three
possible reasons for this:
1) The later publications may include measurements of additional spectra;
2) in some cases the values were included in the average;
3) some initial measures had not included the extremities of the very
extensive wings of H-γ in the spectra of A stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 80 1171 The catalog of Hγ equivalent widths
(table 2 of the paper)
remarks.dat 79 36 Remarks
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
-------------------------------------------------------------------------------
1- 12 A12 --- Name Star name
13- 14 A2 --- m_Name Multiplicity
16- 17 I2 h RAh Right Ascension B1900 (hours)
19- 22 F4.1 min RAm Right Ascension B1900 (minutes)
24 A1 --- DE- Declination B1900 (sign)
25- 26 I2 deg DEd Declination B1900 (degrees)
28- 29 I2 arcmin DEm Declination B1900 (minutes)
30- 34 F5.2 mag Vmag [-1.5/11.4] V-band magnitude (preferably in
Johnson UBV system)
35 A1 --- u_Vmag Uncertainty flag (:) on Vmag
36 A1 --- f_Vmag [V] "V" for variable star
40- 44 F5.2 mag B-V ? (B-V) color index (Johnson)
46- 50 F5.2 mag U-B ? (U-B) color index (Johnson)
52 A1 --- ph [*12] Photometry flags (1)
54- 63 A10 --- SpType MK spectral classification
64- 67 F4.1 0.1nm W [0.8/24]? Hγ equivalent width (Å)
69- 70 I2 --- N [1/44]? Number of measures
73- 74 A2 --- Rem Remarks: "EM" indicates H in emission; "R"
indicates a remark in the "remarks.dat" file
77- 80 I4 --- Seq [1/1171] Sequential number in the publication
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Note (1): the flag means:
1 = the photometry was converted to V, B-V by Beer
2 = the photometry was of the combined light of a double star system
3 = entry from unpublished photometry carried out by A. Argyle, A.H. Batten
and G.A.H. Walker for the extensive program of Petrie and Lee 1966
(1965PDAO...12..435P 1965PDAO...12..435P); these values are, in general, somewhat less
precise than those given in the UBV catalogue of Blanco et al.
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Byte-by-byte Description of file: remarks.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
12- 79 A68 --- Text Text of remark
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History:
* 06-Jan-1975: a magnetic tape version of the catalogue, originally
prepared by the authors, was received at CDS via Geneva Observatory
* 25-Sep-1995: descriptions added by Gail L. Schneider [SSDOO/ADC]
* 11-Feb-2016: documentation standardised at CDS, and remarks added
(End) Francois Ochsenbein [CDS] 11-Feb-2016