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J/ApJ/675/1254      M37 variable stars                       (Hartman+, 2008)

Deep MMT transit survey of the open cluster M37. II. Variable stars. Hartman J.D., Gaudi B.S., Holman M.J., McLeod B.A., Stanek K.Z., Barranco J.A., Pinsonneault M.H., Kalirai J.S. <Astrophys. J., 675, 1254-1277 (2008)> =2008ApJ...675.1254H
ADC_Keywords: Clusters, open ; Stars, variable ; Binaries, eclipsing Keywords: binaries: eclipsing - open clusters and associations: individual (M37) - stars: fundamental parameters - stars: rotation - stars: variables: other - surveys Abstract: We have conducted a deep (15~<r~<23 ), 20 night survey for transiting planets in the intermediate-age (∼550Myr) open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD camera on the 6.5m MMT. In this paper we present a catalog and light curves for 1445 variable stars; 1430 (99%) of these are new discoveries. We have discovered 20 new eclipsing binaries and 31 new short-period (P<1day) pulsating stars. The bulk of the variables are most likely rapidly rotating young low-mass stars, including a substantial number (≳500) that are members of the cluster. We identify and analyze five particularly interesting individual variables, including a previously identified variable that we suggest is probably a hybrid gamma Doradus/delta Scuti pulsator, two possible quiescent cataclysmic variables, a detached eclipsing binary (DEB) with at least one gamma Doradus pulsating component (only the second such variable found in an eclipsing binary), and a low-mass (MP∼MS∼0.6M☉_ DEB that is a possible cluster member. A preliminary determination of the physical parameters for the DEB+gamma Doradus system yields MP=1.58±0.04M, MS=1.58±0.04M, RP=1.39±0.07R, and RS=1.38±0.07R. Description: The observations was presented in Paper I (Cat. J/ApJ/675/1233). The spectra were obtained on four separate nights between 2007 February 23 and March 12 and were used to measure Teff, [Fe/H], vsini , and the radial velocity (RV) via cross-correlation. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 112 1454 Variable star catalog table3.dat 112 29 Suspected variable star catalog
See also: J/A+A/381/65 : BVI photometry of NGC 2099 (Nilakshi+, 2002) J/A+A/412/721 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2003) J/A+A/483/253 : BV photometry of NGC 2099 variables (Messina+, 2008) J/ApJ/675/1233 : gri photometry in M37 (NGC 2099) (Hartman+, 2008) J/ApJ/691/342 : griBVI photometry in M37 (Hartman+, 2009) Byte-by-byte Description of file: table?.dat
Bytes Format Units Label Explanations
1- 4 I4 --- ID Running identification number (1) 6- 7 I2 h RAh Hour of Right Ascension (J2000) 9- 10 I2 min RAm Minute of Right Ascension (J2000) 12- 16 F5.2 s RAs Second of Right Ascension (J2000) 18 A1 --- DE- Sign of the Declination (J2000) 19- 20 I2 deg DEd Degree of Declination (J2000) 22- 23 I2 arcmin DEm Arcminute of Declination (J2000) 25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000) 30- 31 I2 --- Chip ? CCD chip number 33- 43 F11.8 d Per ? Period 45- 55 F11.8 d e_Per ? The 1σ error in Per 57- 63 F7.4 mag <rmag> ? Flux average r band magnitude 65- 70 F6.4 mag rms ? The root-mean-square of r band light curve 72- 77 F6.3 mag gmag ? Paper I (Cat. J/ApJ/675/1233) g band magnitude 79- 84 F6.3 mag rmag ? Paper I (Cat. J/ApJ/675/1233) r band magnitude 86- 91 F6.3 mag imag ? Paper I (Cat. J/ApJ/675/1233) i band magnitude (2) 93- 98 F6.3 mag Bmag ? Kilirai et al. (2001AJ....122.3239K) B band magnitude 100-105 F6.3 mag Vmag ? Kilirai et al. (2001AJ....122.3239K) V band magnitude 107-108 I2 --- Type Source type flag (3) 110-112 I3 --- Sel Selection flag (4)
Note (1): Nomenclature note: Table 1: <Cl* NGC 2099 HGH VNNNN> in Simbad Table 3: <Cl* NGC 2099 HGH SNN> in Simbad Note (2): In table3, the i magnitude is missing, no color term was applied in transforming from the instrumental r and i magnitudes to the Sloan 2.5m system. Note (3): A two-bit flag. The first bit denotes whether or not the star is an eclipsing binary. The second denotes whether or not it shows pulsations. Note (4): A three-bit flag. The first bit denotes if the variable was selected by LS, the second if it was selected by AoV and the third if it was selected by BLS.
History: From electronic version of the journal References: Hartman et al., Paper I 2008ApJ...675.1233H Cat. J/ApJ/675/1233 Hartman et al., Paper III 2009ApJ...691..342H Cat. J/ApJ/691/342 Hartman et al., Paper IV 2009ApJ...695..336H
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-Jul-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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