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2021RNAAS...5..207S - Research Notes of the AAS, 5, 207 (2021/September-0)

Updated Ephemeris and Evidence for a Period Change in the Eclipsing Novalike Variable 1RXS J064434.5+334451.

SHAFTER A.W. and BAUTISTA V.

Abstract (from CDS):

We report seven new eclipse timings for the novalike variable 1RXS J064434.5+334451. An analysis of our data, along with all previously available timings (36 published and 16 unpublished), yields a best-fitting linear ephemeris of BJDecl = 2,453,403.7611(2) + 0.269,374,43(2)E. We find a somewhat improved fit with a quadratic ephemeris given by: BJDecl = 2,453,403.7598 + 0.269,374,87 E - 2.0 × 10–11 E2, which suggests that the orbital period may be decreasing at a rate given by $\dot{P}\simeq -1.5\times {10}^{-10}$.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Cataclysmic variable stars - Nova-like variable stars - Eclipsing binary stars

Simbad objects: 1

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