Swift observations of SDSS J141118.31+481257.6 during superoutburst
ATel #11699; L. E. Rivera Sandoval, T. Maccarone (Texas Tech University)
on 8 Jun 2018; 00:57 UT
Credential Certification: Liliana Rivera Sandoval (liliana.rivera@ttu.edu)
Subjects: Ultra-Violet, X-ray, Binary, Cataclysmic Variable, Transient, Variables
We report on follow-up Swift observations of the AM CVn-type binary SDSS J141118.31+481257.6 (ATEL #11668, #11672). Based on ground based photometry, the re-brightening previous to the current superoutburst was reported on 2018-June-1 (https://www.aavso.org/aavso-alert-notice-636).
We observed the object on 2018-June-7 for ~1ks with Swift using UVOT and XRT. The object was found to have a UVM2 magnitude of 11.63 +/- 0.02 in the Vega-photometric system (uncorrected for Galactic extinction). We determined an X-ray count rate of (2.1+/-0.5)E-02 cts/s in the 0.3-10keV energy band.
SDSS J141118.31+481257.6 has become ~4.3 mags brighter in UVM2 compared to the last Swift observation performed on May-26, when the object had a magnitude of 16.00 +/- 0.10 in that filter (ATEL #11672). The current X-ray count rate is approximately half of that one observed on May-26, indicating that the accretion flow is again optically thick.
We thank the Swift team for approving and executing our ToO request.
