J/A+A/410/879 VRI CCD photometry of NGC 2126 (Gaspar+, 2003)
The first CCD photometric study of the open cluster NGC 2126.
Gaspar A., Kiss L.L., Bedding T.R., Derekas A., Kaspi S., Kiss C.,
Sarneczky K., Szabo G.M., Varadi M.
<Astron. Astrophys. 410, 879 (2003)>
=2003A&A...410..879G 2003A&A...410..879G
ADC_Keywords: Clusters, open ; Photometry, VRI ; Photometry, CCD ;
Stars, variable
Keywords: open clusters and associations: general -
open clusters and associations: individual: NGC 2126 -
stars: variables: general - stars: variables: delta Scuti -
star: binaries: eclipsing
Description:
We present the first CCD photometric observations of the northern open
cluster NGC 2126. Data were taken on eight nights in February and
December 2002 with a total time span of ∼57 hours. Almost 1000
individual V-band frames were examined to find short-period variable
stars. We discovered six new variable stars, of which one is a
promising candidate for an eclipsing binary with a pulsating
component. Here we present single-epoch colours and magnitudes for
∼800 stars in the field and the light curve data for the six
variables. Note that the coordinates in ngc2126.dat are not
particularly accurate because of the applied crude astrometry (errors
up to ±1-2arcsec are quite likely close to the edge). For variable
star identification, consult table3.dat.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ngc2126.dat 49 816 Coordinates, colours and magnitudes
table3.dat 107 6 The basic data of new variable stars
var1.dat 19 967 V1 V-light curve
var2.dat 19 967 V2 V-light curve
var3.dat 19 967 V3 V-light curve
var4.dat 19 967 V4 V-light curve
var5.dat 19 967 V5 V-light curve
var6.dat 19 967 V6 V-light curve
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Byte-by-byte Description of file: ngc2126.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 22 F4.1 arcsec DEs Declination (J2000)
24- 29 F6.3 mag Vmag Standard V magnitude
31- 35 F5.3 mag V-R Standard V-R colour index
37- 41 F5.3 mag V-I Standard V-I colour index
43- 45 I3 mas/yr pmRA USNO-B1.0 (I/284) proper motion in
right ascension
47- 49 I3 mas/yr pmDE USNO-B1.0 (I/284) proper motion in declination
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- VName Variable number
4- 15 A12 --- GSC2 GSC2.2 number (1)
18 I1 h RAh Right ascension (J2000) (1)
20- 21 I2 min RAm Right ascension (J2000) (1)
23- 27 F5.2 s RAs Right ascension (J2000) (1)
29 A1 --- DE- Declination sign (J2000) (1)
30- 31 I2 deg DEd Declination (J2000) (1)
33- 34 I2 arcmin DEm Declination (J2000) (1)
36- 39 F4.1 arcsec DEs Declination (J2000) (1)
41- 45 F5.2 mag Vmag V magnitude
47- 50 F4.2 mag V-R V-R colour index
52- 55 F4.2 mag V-I V-I colour index
57- 62 F6.4 d Per ? Period
64- 70 F7.5 d Per2 ? Second possible period
72- 75 F4.2 mag DVmag Amplitude in V band
77- 88 F12.4 d Epoch ? Epoch, in Julian date
91- 98 A8 --- VType Type of variable
100-107 A8 --- LCfile Name of file containing the V-light curve
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Note (1): Except V6, coordinates and identifications were taken from the
Guide Star Catalog, Version 2.2 (STSci 2001), Cat. I/271
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Byte-by-byte Description of file: var?.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 19 F6.3 mag Vmag V magnitude
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Acknowledgements: Laszlo Kiss
(End) Patricia Bauer [CDS] 20-Nov-2003