J/MNRAS/455/2337 M67 variable stars photometry (Nardiello+, 2016)
Variable stars in one open cluster within the Kepler/K2-Campaign-5 field:
M 67 (NGC 2682).
Nardiello D., Libralato M., Bedin L.R., Piotto G., Ochner P., Cunial A.,
Borsato L., Granata V.
<Mon. Not. R. Astron. Soc., 455, 2337-2344 (2016)>
=2016MNRAS.455.2337N 2016MNRAS.455.2337N (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, variable ; Photometry, CCD ;
Proper motions
Keywords: techniques: photometric - proper motions - binaries: general -
stars: variables: general -
open clusters and associations: individual: M 67
Abstract:
In this paper, we continue the release of high-level data products
from the multiyear photometric survey collected at the 67/92cm
Schmidt Telescope in Asiago. The primary goal of the survey is to
discover and to characterize variable objects and exoplanetary
transits in four fields containing five nearby open clusters spanning
a broad range of ages. This second paper releases a photometric
catalogue, in five photometric bands, of the solar-age,
solar-metallicity open cluster M 67 (NGC 2682). Proper motions are
derived comparing the positions observed in 2013 at the Asiago's
Schmidt Telescope with those extracted from Wide Field Imager@2.2m
Max-Planck-Gesellschaft/European Southern Obseratory images in 2000.
We also analyse the variable sources within M 67. We detected 68
variables, 43 of which are new detection. Variable periods and
proper-motion memberships of a large majority of sources in our
catalogue are improved with respect to previous releases. The entire
catalogue will be available in electronic format. Besides the general
interest on an improved catalogue, this work will be particularly
useful because of: (1) the imminent release of Kepler/K2 Campaign-5
data of this clusters, for which our catalogue will provide an
excellent, high spatial resolution input list, and (2)
characterization of the M 67 stars which are targets of intense High
Accuracy Radial velocity Planet Searcher and High Accuracy Radial
velocity Planet Searcher for the Northern hemisphere radial-velocity
surveys for planet search.
Description:
All images of the OC M 67 [(RA,DE)=(08:51:18,+11:48:00)] were
collected with the Asiago 67/92cm Schmidt Telescope located on Mount
Ekar (longitude 11.5710°E, latitude 45.8430°N, altitude 1370m),
that belongs to the Astronomical Observatory of Padova (OAPD), which
is part of the Istituto Nazionale di Astrofisica (INAF). At the focus
of the Schmidt telescope there is a SBIG STL-11000M camera, equipped
with a Kodak KAI-11000M detector (4050x2672 pixel, field of view:
58x38-arcmin2, pixel scale: 862.5mas/pixel).
In the first observing season (2012) M 67 data were collected in white
light (hereafter indicated with filter N, where N stands for
'None'), with exposure time of 120s, and 60s (during the
almost-full moon nights); during the second (2013) and the third
season (2014) we collected 180s+15s R-filter and 180s B-filter
images. Finally, during the fourth season (2015), the observations
were carried out in I band (240s+15s) and V band (240s).
A catalogue for variable stars in M 67 field is presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 128 68 Catalogue of variable stars
m67.dat 203 6905 Catalog of sources that cover a FOV of
∼0.612deg2 centred on M 67
lc/* . 406 Individual light curves
(N, B, I (15s), I (240s), R (15s), R(180s))
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See also:
J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008)
J/A+A/526/A127 : M67 main-sequence & giant stars Velocities (Pasquini+, 2011)
J/A+A/545/A139 : Radial Velocities of stars observed in M67 (Pasquini+, 2012)
J/AJ/150/97 : Radial velocities in M67. I. Candidate members (Geller+, 2015)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I05 --- Star Star identification number
7- 15 F9.5 deg RAdeg Right ascension (J2000)
17- 25 F9.6 deg DEdeg Declination sign (J2000)
27- 39 F13.9 d P ?=-99 Period of variability
40- 47 F8.4 mag Nmag ?=-99.999 Instrumental "white light" magnitude
49- 56 F8.4 mag Bmag ?=-99.999 Calibrated B magnitude
58- 65 F8.4 mag Vmag ?=-99.999 Calibrated V magnitude
67- 74 F8.4 mag Rmag ?=-99.999 Calibrated R magnitude
76- 83 F8.4 mag Imag ?=-99.999 Calibrated I magnitude
85- 92 F8.4 mag Jmag ?=-99.999 J magnitude in 2MASS system
94-101 F8.4 mag Hmag ?=-99.999 H magnitude in 2MASS system
103-110 F8.4 mag Ksmag ?=-99.999 Ks magnitude in 2MASS system
112-119 F8.4 % MP ?=-1 Membership probability
121-128 F8.2 km/s RV ?=-1000 Radial velocity from Geller et al.
(2015, Cat. J/AJ/150/97)
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Byte-by-byte Description of file: m67.dat
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Bytes Format Units Label Explanations
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4- 12 F9.5 deg RAdeg Right ascension (J2000)
17- 25 F9.6 deg DEdeg Declination (J2000)
30- 38 F9.4 pix Xpos X position
43- 51 F9.4 pix Ypos Y position
57- 64 F8.4 mag Nmag Instrumental "white light" magnitude
70- 77 F8.4 mag Bmag ?=-99.999 B magnitude
83- 90 F8.4 mag Vmag ?=-99.999 V magnitude
96-103 F8.4 mag Rmag ?=-99.999 R magnitude
109-116 F8.4 mag Imag ?=-99.999 I magnitude
122-129 F8.4 mag Jmag ?=-99.999 2MASS J magnitude
135-142 F8.4 mag Hmag ?=-99.999 2MASS H magnitude
148-155 F8.4 mag Ksmag ?=-99.999 2MASS Ks magnitude
159-163 I5 --- Star Star sequential number
169-177 F9.4 mas/yr pmRA ?=-999.9999 Proper motion along RA
182-190 F9.4 mas/yr pmDE ?=-999.9999 Proper motion along DE
197-203 F7.4 --- MP ?=-1 Membership probability
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Byte-by-byte Description of file (#): lc/*
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Bytes Format Units Label Explanations
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4- 20 F17.9 d BJD Barycentric Julian date
25- 33 F9.4 mag mag Magnitude in filter
40- 46 F7.4 mag e_mag rms uncertainty on mag
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History:
* 17-Oct-2016: From electronic version of the journal
* 13-Jun-2017: Light curves and m67 catalog added
(End) Patricia Vannier [CDS] 28-Jul-2016