Detection and follow-up observation of SN 2020aeps, the first discovery of XMO-PAT Survey

ATel #14313; Hanjie Tan (Graduate Institute of Astronomy, National Central University), Mi Zhang, Guoyou Sun (Xingming Observatory), Xing Gao (Urumqi No. 1 Senior High School)
on 11 Jan 2021; 22:30 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Quanzhi Ye (qye@umd.edu)

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Supernova SN 2020aeps (internal name XM25HT) was discovered by XMO-PAT unfiltered images on 2020-12-29.90 with 16.89 r mag. The spectrum obtained by SCAT (ATel #11444) on 2021-01-05 classified it as a type Ia supernova with a redshift of z = 0.0244, and was about 1 week before the peak brightness. The SN 2020aeps is located 1.8" east and 7.4" south of the center of galaxy KUG 1206+328 (z = 0.024441 given by NASA/IPAC Extragalactic Database (NED)), and is only 0.76" away from SDSS J120847.47+323206.9 with 20.9 r mag. The discovery images are available at: http://xjltp.china-vo.org/XM25HT.html .

We conducted follow-up observations of SN 2020aeps using 0.6-m Ningbo bureau of Education and Xinjiang observatory Telescope (NEXT) on 2020-12-30, 2021-01-09, and 2021-01-11. All aperture photometry listed below were calibrated by APASS (for B and V band images) and SDSS (for g, r, and i band images) catalog.

 
mid-Time                MJD                 mag 
2020-12-30.87563    59213.87563    16.88+-0.04 r 
2021-01-09.77054    59223.77054    16.07+-0.01 B 
2021-01-09.75006    59223.75006    16.01+-0.02 V 
2021-01-09.75391    59223.75391    16.03+-0.01 g 
2021-01-09.75770    59223.75770    16.06+-0.02 r 
2021-01-09.76146    59223.76146    16.61+-0.05 i 
2021-01-11.75050    59225.75050    16.15+-0.01 B 
2021-01-11.75428    59225.75428    16.18+-0.16 V 
2021-01-11.75809    59225.75809    16.16+-0.10 g 
2021-01-11.76185    59225.76185    16.07+-0.02 r 
2021-01-11.76561    59225.76561    16.58+-0.04 i 

XMO-PAT Survey started on 1st December 2020, is the pilot test of Xingming Array Sky Survey (planned). The 0.3-m PAT (Photometric Auxiliary Telescope) was installed at Xingming Observatory (Xinjiang, China), with a field-of-view of 2x2 degrees to a depth of 19.0 mag, covered ~500 square degrees every night. All data were reduced with the real-time analysis pipeline, transients and small bodies of solar system candidates were performed by the machine learning techniques.