Rebrightening of the anomalous transient AT2020iko/ZTF20aawbodq
ATel #13706; Monika Soraisam (NCSA/UIUC), Chien-Hsiu Lee (NSF OIR Lab), Gautham Narayan (UIUC), Thomas Matheson, Abhijit Saha (NSF OIR Lab), Arizona-NOAO Temporal Analysis and Response to Events System (ANTARES) team
on 3 May 2020; 21:03 UT
Credential Certification: Monika Soraisam (soraisam@illinois.edu)
Subjects: Optical, Transient
We report an anomalous transient, ZTF20aawbodq/AT2020iko, which was flagged by a filter based on the anomaly detection algorithm of Soraisam et al. (2020), running on the ANTARES alert-broker (https://antares.noao.edu/). The source is within 0.5" of the galaxy SDSSJ090326.23+473159.5. The public ZTF survey first detected this transient on 26 April 2020 UT, at g=16.74+/-0.03, preceded by non-detections. It was also detected by ATLAS (https://wis-tns.weizmann.ac.il/object/2020iko) on 27 April 2020 UT at 18.558 mag (orange-ATLAS). After fading rapidly (approximately 1 mag/day) to around 20 mag, it has re-brightened to R~16.5 mag on 2 May 2020 UT. Its ZTF light curve can be accessed at https://antares.noao.edu/alerts/locus/9325899.
We encourage follow-up observations of this transient.
