Error estimation and statistical significance of the EP J194531.8-612009 period
ATel #17948; N. Palivanas (UNIVAP, Brazil), G. J. M. Luna (Conicet/UNAHUR, Argentina), I. J. Lima (UNESP, Brazil), A. C. Mattiuci (INPE, Brazil), C. V. Rodrigues (INPE, Brazil), A. S. Oliveira (UNIVAP, Brazil), D. C. Souza (UNIVAP, Brazil)
on 7 Aug 2026; 18:54 UT
Credential Certification: Claudia V Rodrigues. (claudiavilega@gmail.com)
Subjects: Optical, Binary, Cataclysmic Variable
We correct ATel #17930, which omitted the uncertainty on the derived period. Our period measurement is P = 0.079028 +/- 0.000041 days (~1.897 hours), with the error estimated from the full width at half maximum (FWHM) of the corresponding periodogram peak. The peak has a False Alarm Probability (FAP) < 10E-17. Additionally, we applied the open-source Python package TESS_Localize (Higgins & Bell 2022, ascl:2204.005) to the TESS Target Pixel File (TPF) data of Gaia DR3 6442291862707764096. This algorithm calculates the spatial probability distribution relative to cataloged Gaia sources. Excluding Sectors 94 and 101, where no significant period was detected, TESS_Localize confirmed that the variable source is consistent with the exact Gaia coordinates of EP J194531.8-612009 at a relative likelihood of ~90%.
