Classical nova AT2021afpi, a possible EM counterpart to IC211125A, is in X-ray outburst
ATel #15073; Vaidehi S. Paliya (ARIES, India)
on 29 Nov 2021; 05:12 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Vaidehi S. Paliya (vaidehiratna@gmail.com)
Subjects: X-ray, Cataclysmic Variable, Nova, Variables
Master-Tavrida auto-detection system has reported a rapid 10-mag brightening of an optical transient AT2021afpi or MASTER OT J030227.28+191754.5 (ATEL #15067) close-in-time to the IceCube detected neutrino event IceCube-21125A (GCN #31126). This object has subsequently been identified as a classical nova (ATEL #15069, #15072).
A prompt Swift-XRT target of opportunity observation (photon counting mode) was requested and the target was observed starting from 2021-11-28 19:33:02 (UT) for a net exposure of 2 ksec. A bright X-ray source positionally consistent with AT2021afpi was found with the optimized coordinates: RA, Decl.=45.61402 deg., 19.29856 deg. (=03h 02m 27.36s, +19d 17m 54.8s), error radius 2.2'' (90% confidence). There are hints of flux variability with the count rate varying between 0.4-1.1 cps (100 sec binning). There are no previous X-ray detections of this object.
Multi-wavelength follow-up observations are encouraged.
