A PRELIMINARY CALIBRATION OF THE RR LYRAE PERIOD-LUMINOSITY RELATION AT MID-INFRARED WAVELENGTHS: WISE DATA

Madore, Barry F.; Hoffman, Douglas; Freedman, Wendy L.; Kollmeier, Juna A.; Monson, Andy; Persson, S. Eric; Rich, Jeff A., Jr.; Scowcroft, Victoria; Seibert, Mark
2013
ASTROPHYSICAL JOURNAL
DOI
10.1088/0004-637X/776/2/135
Using time-resolved, mid-infrared data from the Wide-field Infrared Survey Explorer (WISE) and geometric parallaxes from the Hubble Space Telescope for four Galactic RR Lyrae variables, we derive the following Population II period-luminosity (PL) relations for the WISE [W1], [W2], and [W3] bands at 3.4, 4.6, and 12 mu m, respectively: