J/AJ/89/1707 Photographic observations of variable stars in M9 (Clement+, 1984)
A new investigation of the variable stars in the globular cluster Messier 9.
Clement C.M., Ip P., Robert N.
<Astron. J., 89, 1707-1711 (1984)>
=1984AJ.....89.1707C 1984AJ.....89.1707C
ADC_Keywords: Clusters, globular ; Stars, variable ; Photometry, photographic
Keywords: globular clusters: M9 - stars: variables
Abstract:
New observations from the southern hemisphere have been used to check
the periods for the 11 RR Lyrae variables in and around the globular
cluster Messier 9. The periods were determined previously with data
from northern observatories where M9 can only be observed over a small
range in hour angle. Three of the eleven published periods were found
to be in error. As a result of this, the mean period of the RRc
variables has been revised from 0.279d to 0.341d, the mean period of
the RRab variables has been revised from 0.614d to 0.621d,and a star
previously believed to be an RR Lyrae has been reclassified as a
Population II Cepheid. One of the RRc variables may be a double-mode
pulsator. Another variable was studied, but the data were not
sufficient for determining its period.
Description:
Time-series B photographic photometry for 12 variable stars in the
globular cluster M9.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 49 12 List of variables
table2.dat 83 50 Time-series B photographic photometry for 12
variable stars in Messier 9 (NGC 6333)
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See also:
J/AJ/101/1352 : Observations of variable stars in M9 (Clement+, 1991)
J/AJ/112/618 : CCD photometry of variable stars in M9 (Clement+, 1996)
J/AJ/118/453 : M9 RR Lyrae CCD observations (Clement+, 1999)
J/MNRAS/434/1220 : Vi light curves of NGC6333 variables (Arellano Ferro+, 2013)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- VName Variable name (VNN),
<Cl* NGC 6333 SAW VNN> in Simbad
6- 7 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
9- 10 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
12- 16 F5.2 s RAs Simbad Second of Right Ascension (J2000.0)
18 A1 --- DE- Simbad Sign of the Declination (J2000.0)
19- 20 I2 deg DEd Simbad Degree of Declination (J2000.0)
22- 23 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
25- 28 F4.1 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
30- 34 F5.2 mag Bmag Simbad B band magnitude
36- 39 F4.1 mag Vmag ? Simbad V band magnitude
41- 49 F9.7 d Per ? Period (from table3 of the paper)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Heliocentric Julian day
13- 17 F5.2 mag V1mag B magnitude of V1
19- 23 F5.2 mag V2mag B magnitude of V2
25- 29 F5.2 mag V3mag B magnitude of V3
31- 35 F5.2 mag V4mag B magnitude of V4
37- 41 F5.2 mag V5mag ?=- B magnitude of V5
43- 47 F5.2 mag V6mag ?=- B magnitude of V6
49- 53 F5.2 mag V7mag ?=- B magnitude of V7
55- 59 F5.2 mag V8mag B magnitude of V8
61- 65 F5.2 mag V9mag ?=- B magnitude of V9
67- 71 F5.2 mag V10mag B magnitude of V10
73- 77 F5.2 mag V12mag ?=- B magnitude of V12
79- 83 F5.2 mag V13mag B magnitude of V13
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Acknowledgements:
Daniel Bramich, ESO, Germany
Armando Arellano Ferro, Instituto de Astronomia, UNAM, Mexico
(End) Daniel Bramich [ESO], Patricia Vannier [CDS] 15-Oct-2013