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Near-Infrared Variability in the 2MASS Calibration Fields: A Search for Planetary Transit Candidates

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arxiv 0709.1182 v1 pith:RZJCQIZN submitted 2007-09-08 astro-ph

Near-Infrared Variability in the 2MASS Calibration Fields: A Search for Planetary Transit Candidates

Peter Plavchan , M. Jura , J. Davy Kirkpatrick , Roc M. Cutri , S. C. Gallagher This is my paper
classification astro-ph
keywords calibrationvariablesmasscandidatesfieldsincludingobservationsperiodic
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The 2MASS photometric calibration observations cover ~6 square degrees on the sky in 35 "calibration fields" each sampled in nominal photometric conditions between 562 and 3692 times during the four years of the 2MASS mission. We compile a catalog of variables from the calibration observations to search for M dwarfs transited by extra-solar planets. We present our methods for measuring periodic and non-periodic flux variability. From 7554 sources with apparent Ks magnitudes between 5.6 and 16.1, we identify 247 variables, including extragalactic variables and 23 periodic variables. We have discovered three M dwarf eclipsing systems, including two candidates for transiting extrasolar planets.

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    VarWISE catalog identifies 457,080 high-confidence infrared variables (49.81% new) and an extended set of 1.9 million from NEOWISE photometry via spatial clustering, VARnet detection, and XGBoost classification.