The AM CVn-type system SDSS J141118.31+481257.6 is going back to quiescence
ATel #11672; L. E. Rivera Sandoval, T. Maccarone (Texas Tech University)
on 27 May 2018; 02:56 UT
Credential Certification: Liliana Rivera Sandoval (liliana.rivera@ttu.edu)
Subjects: Optical, X-ray, Binary, Cataclysmic Variable, Transient, Variables
Referred to by ATel #: 11699
We have performed Swift follow-up observations of the AM CVn-type system SDSS J141118.31+481257.6 after its first detected optical outburst (ATel #11668). We observed the object on 2018-May-24 and 2018-May-26 in X-rays and UV (~1 ks each observation). The binary was found to have magnitudes of 15.06 +/- 0.06 and 16.00 +/- 0.10 in UVM2 (in the Vega-photometric system), respectively. It has faded by ~4.5 mags in that UV filter since 2018-May-22, indicating that it is going back to quiescence. While the UV brightness of the object has decreased, its X-ray count rate has increased. We measured count rates in the 0.3-10 keV band of (2.2 +/- 0.5)E-02 cts/s and (4.7 +/- 0.8)E-02 cts/s, respectively. There is therefore an increase by a factor of 2.9 in the X-ray flux since 2018-May-23, suggesting that the accretion flow has become optically thin.
We are grateful to the Swift team for its fast response to our ToO request.
