Dear friends,

Using my private system scraping MARS ( https://mars.lco.global/ ), I've just found ZTF21abwplpy out as a CV candidate from the public ZTF data. It's amplitude is > ~ 6.0 mag (assuming the limiting mag of PS1-g is 21.6). (I'm sorry if someone has already discovered and reported it.)

Lasair: https://lasair.roe.ac.uk/object/ZTF21abwplpy/ ALeRCE: https://alerce.online/object/ZTF21abwplpy MARS: https://mars.lco.global/?objectId=ZTF21abwplpy

According to ALeRCE, the position is (RA, Dec) = (19:15:25.637, -13:31:07.56)

Last non-detections by ZTF: g > 20.5191 on 2021-08-29.21 (ZTF, 'difference mag' via ALeRCE)

First detections by ZTF: g = 15.601 +/- 0.024 on 2021-09-01.17 (ZTF, 'difference mag' via ALeRCE)

Second detections by ZTF: r = 16.369 +/- 0.045 on 2021-09-03.23 (ZTF, 'difference mag' via ALeRCE) g = 16.281 +/- 0.030 on 2021-09-03.25 (ZTF, 'difference mag' via ALeRCE)

The result of ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/1713e323-474d-437d-aa0b-d65df3... It confirms a nearby star is contaminated.

There are no possible counterparts recorded in the PS1 mean object catalog.

No known minor planets are found by the Minor Planet Checker (https://www.minorplanetcenter.net/cgi-bin/checkmp.cgi).

Best Regards and Clear Skies, Kenta