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II/26A Narrow-band photometry of Early-type stars (Morguleff+, 1975)
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Catalogue of early-type stars measured in a narrow-band photometric system
Morguleff N., Gerbaldi M.
<Astron. Astrophys. Suppl. Ser. 19, 189 (1975)>
=1975A&AS...19..189M
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ADC_Keywords: Photometry; Stars, early-type
Description:
A compilation of the photoelectric measurements in the Barbier-Morguleff
system is presented for 773 stars of spectral types O8 to F6.
706 stars have been measured at least twice.
The passbands (in Angstroems) and the mean photometric errors
of the indexes C(j)-C(2) (in magnitudes) are:
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Band Interval m.e.
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C(1) 6000-5900 0.0318
C(2) 5000-4900 ---
C(3) 4905-4815 0.0073
C(4) 4380-4310 0.0100
C(5) 4070-4010 0.0102
C(6) 3965-3925 0.0201
C(7) 3780-3720 0.0195
C(8) 3650-3575 0.0189
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Regarding the catalog Pass Bands Morguleff and Gerbaldi (1975) note
the following:
These spectral intervals permit the determination of certain
physical characteristics .... The pass bands 1 and 5 lead us
to calculate red and blue gradients. The equivalent widths
of the H(beta), H(gamma) lines of hydrogen and the K lines of
Ca II are derived from band 3, 4, and 6. Bands 7 and 8 measure
the Balmer jump.
Listed in the catalog file are the normalized magnitudes corresponding
to the above pass bands. The normalized magnitude of a pass band,
C(j), is defined as the color index of the magnitude in the band minus
the magnitude of the second band, C(2).
See Morguleff and Gerbaldi (1975) for a brief discussion of
conservation of the system and mean errors across all stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 127 773 The catalogue
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name *HD or BD (if starting with a + sign)
identification
10 A1 --- Var [V] 'V' indicates a variable star
11- 18 F8.5 mag c1 *Index C(1)-C(2).
19- 26 F8.5 mag c3 *Index C(3)-C(2).
27- 34 F8.5 mag c4 *Index C(4)-C(2).
35- 42 F8.5 mag c5 *Index C(5)-C(2).
43- 50 F8.5 mag c6 *Index C(6)-C(2).
51- 58 F8.5 mag c7 *Index C(7)-C(2).
59- 66 F8.5 mag c8 *Index C(8)-C(2).
69- 70 I2 --- Obs *Number of measurements
72- 79 F8.5 mag e_c1 ? Mean error on c1 (1)
80- 87 F8.5 mag e_c3 ? Mean error on c3 (1)
88- 95 F8.5 mag e_c4 ? Mean error on c4 (1)
96-103 F8.5 mag e_c5 ? Mean error on c5 (1)
104-111 F8.5 mag e_c6 ? Mean error on c6 (1)
112-119 F8.5 mag e_c7 ? Mean error on c7 (1)
120-127 F8.5 mag e_c8 ? Mean error on c8 (1)
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Note (1): the mean error is only computed if Obs>1
Note on Name:
HD or BD number of the object. Only the last two objects have
BD rather than HD numbers.
Note on c1, c3, c4, c5, c6, c7, c8:
The normalized magnitudes in seven of the eight pass bands (see "Pass
Bands"). C(2) is always equal to zero, by definition.
Note on Obs:
Number of measurements contributing to the above values.
References:
Morguleff, N. and Gerbaldi, M. 1975, Astron. Astrophys. Suppl., 19, 189.
Barbier, D. 1960, Ann. Astrophys., 23, 431.
Barbier, D. and Morguleff, N. 1964, Compt. Rend. Acad. Sci. Paris, 258, 4925.
Historical Notes, Remarks, and Modifications:
* Catalogue received at CDS in 1975 (punched cards)
* January 1995: standardised description, added 'V' symbol for
variable stars listed in the paper.
* March 1995: included pertinent information from original ADC
documentation to the catalog by N. Paul Kuin.
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(End) Francois Ochsenbein [CDS] and N. Paul Kuin [ADC/SSDOO/NASA] 29-March-1995