MOTESS-GNAT Sky Survey: MG1 Long Period Variable Stars Re-Visited After 10 Years

Volume 50 number 2 (2022)

Brian L. Craine: Western Research Company, Inc. and GNAT, Inc., 3275 W. Ina Road, Suite 221-A1, Tucson, AZ 85741; send email correspondence to blcraine@wrc-inc.com
Andrew S. Kulessa: Andrew S. Kulessa Colin Gum Observatory, Greenhill, SA, Australia; GNAT, Inc., 3275 W. Ina Road, Suite 221-A1, Tucson, AZ 85745; andskul@gmail.com
Eric R. Craine: Western Research Company, Inc. and GNAT, Inc., 3275 W. Ina Road, Suite 221-A1, Tucson, AZ 85741; ercraine@wrc-inc.com
Roger B. Culver: GNAT, Inc., 3275 W. Ina Road, Suite 221-A1, Tucson, AZ 85741; Professor Emeritus of Astronomy, Colorado State University, Fort Collins, CO 80523; Roger.Culver@coloradostate.edu
Adam L. Kraus: Department of Astronomy, University of Texas, Austin, TX 78712; alk@astro.as.utexas.edu
Roy A. Tucker: Tucson, AZ (deceased)
Douglas K. Walker: Prime Solutions Group, Inc and GNAT, Inc., 3275 W. Ina Road, Suite 221-A1, Tucson, AZ 85741; dougwalker@psg-inc.net

Abstract

The MG6 survey is a 10-year follow-up to the MG1 survey. A new reduction of these surveys has been performed and screened for candidate long period variable stars (LPVs). In combination with the original 47 LPVs found in the MG1 variable star candidate catalog a total of 138 LPVs have been identified in the MG1 48.3'-wide equatorial strip. The additional data have allowed for refinement of the period determinations for most of the LPVs. Some of the biases of the selected population with respect to period length and color distribution are examined. This study has newly identified 9 unique LPVs, bringing the total number of new LPV identifications from the MOTESS-GNAT survey to 56. The number of LPVs in this list exhibiting hump characteristics has been expanded to at least 15.