II/26A Narrow-band photometry of early-type stars (Morguleff+, 1975)
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 1975A&AS...19..189M
ADC_Keywords: Photometry, narrow-band ; 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:
-----------------------
Band Interval m.e.
-----------------------
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
-----------------------
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 (observations until 1973-October)
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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 --- N [1/11] 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
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Historical Notes, Remarks, and Modifications:
* Catalogue prepared in July 1974, 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.
* August 2016: cosmetic changes.
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.
(End) Francois Ochsenbein [CDS] and N. Paul Kuin [ADC/SSDOO/NASA] 29-Mar-1995