[vsnet-alert 25335] TCP J10203579+3103424 = AT 2021bxp: possible WZ Sge star

[Kojiguchi Naoto]

TCP J10203579+3103424 = AT 2021bxp: possible WZ Sge star

     Large outburst amplitude of 8 mag. According to CRTS data, this object has shown a possible superoutburst in 2007.

TOCP:
TCP J10203579+3103424   2021 02 05.9095*  10 20 35.79 +31 03 42.4 13.0 R             Lmi       R 9
http://www.cbat.eps.harvard.edu/unconf/followups/J10203579+3103424.html

TNS:
Possible Nova or CV, ~8 mag rise in PS1 source. The transient was discovered on several 120-s survey images (limiting mag about 19.0) taken by Xing Gao using PAT at Xingming Observatory #3 (N88). Images can be found at: http://xjltp.china-vo.org/xm51ht.html
https://www.wis-tns.org/object/2021bxp
http://xjltp.china-vo.org/xm51ht.html

ASASSN Sky Patrol:
https://asas-sn.osu.edu/sky-patrol/coordinate/c872cd57-30df-4cb2-a110-2c1fe7362bc6

IDs:
102035.763 +310342.293 Gaia_DR2_742695502990411392 Plx=-(-) pmRA=-(-) pmDE=-(-) G=20.8967(0.0158) BP-RP=-0.0429
102035.763 +310342.297 Gaia_EDR3_742695502990411392 Plx=-(-) pmRA=-(-) pmDE=-(-) G=20.8377(0.0169) BP-RP=0.9516
102035.755 +310342.544 SDSSJ102035.75+310342.4 u=20.833(0.083) g=20.887(0.032) r=20.903(0.043) i=20.942(0.064) z=21.407(0.341)
102035.808 +310343.279 GALEX J102035.8+310343 FUV=21.4782(0.2544) NUV=21.5026(0.2214)
102035.762 +310342.278 PS1_145271551490014744 g=20.7753(0.0124) r=20.8408(0.0593) i=20.9342(0.0392) z=20.6785(0.0466)

2007: probably superoutburst
TCPJ10203579+3103424 20071014.085 <14.50V AS3
TCPJ10203579+3103424 20071015.507 14.280C CRT
TCPJ10203579+3103424 20071016.072 <14.50V AS3
TCPJ10203579+3103424 20071030.029 <14.50V AS3
TCPJ10203579+3103424 20071105.020 <14.50V AS3
TCPJ10203579+3103424 20071112.445 15.960C CRT
TCPJ10203579+3103424 20071209.027 <14.50:V AS3
TCPJ10203579+3103424 20071215.042 <14.50V AS3
TCPJ10203579+3103424 20071216.374 19.880C CRT
TCPJ10203579+3103424 20080210.322 20.840C CRT
TCPJ10203579+3103424 20080313.313 20.420C CRT

2021:
TCPJ10203579+3103424 20210204.402 <16.461g ASN
TCPJ10203579+3103424 20210205.211 16.160g ASN
TCPJ10203579+3103424 20210205.909 13.0C (XOSS)