J/AJ/126/2954 VI light curves of Sand 986 in M67 (Sandquist+, 2003)
S986 in M67: a totally eclipsing binary at the cluster turnoff.
Sandquist E.L., Shetrone M.D.
<Astron. J., 126, 2954-2962 (2003)>
=2003AJ....126.2954S 2003AJ....126.2954S
ADC_Keywords: Binaries, eclipsing ; Photometry, CCD
Keywords: binaries: eclipsing - blue stragglers -
open clusters and associations: individual (NGC 2682) -
stars: individual (S986)
Abstract:
We have discovered that the star S986 in the old open cluster M67 has
detectable total eclipses of depth 0.08mag for the primary eclipse
and 0.011mag for the secondary eclipse (in I only). We confirm the
detection of a third star in spectra contributing (11.5±1.5)% of the
total light in V band. The radial velocity of the third star indicates
that it is a cluster member, but it is unclear whether it is
physically associated with the eclipsing binary.
Description:
All of the photometry for this study was taken at the 1-m telescope at
the Mount Laguna Observatory using a 2048x2048 CCD on nights between
2000 December and 2002 November.
Objects:
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RA (2000) DE Designation(s)
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08 51 18.0 +11 45 54 S989 = Cl* NGC 2682 SAND 986
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 34 2148 V-Band Photometry of S986
table4.dat 34 793 I-Band Photometry of S986
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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- 12 F12.4 d HJD Heliocentric Julian Date of the observation
14- 20 F7.4 mag DVmag The V band magnitude minus the median magnitude
22- 27 F6.4 mag e_DVmag Error in DVmag
29- 34 F6.4 --- Phase Orbital phase
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date of the observation
14- 20 F7.4 mag DImag The I band magnitude minus the median magnitude
22- 27 F6.4 mag e_DImag Error in DImag
29- 34 F6.4 --- Phase Orbital phase
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 12-Jan-2004