April 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9169] DDE 177: Z Cam star
by Taichi Kato 04 Apr '22

04 Apr '22

DDE 177: Z Cam star From ZTF data. Two standstills in 2019.

1 0

[vsnet-newvar 9168] DDE 179: polar
by Taichi Kato 04 Apr '22

04 Apr '22

DDE 179: polar From ZTF data. Porb=0.0533795(3) d and two humps per period. High state in late 2018.

1 0

[vsnet-newvar 9167] Gaia21fgn faded and brightened
by Taichi Kato 04 Apr '22

04 Apr '22

Gaia21fgn faded and brightened According to observations by Itoh-san and Tonny Vanmunster, this object once haded to 17.0 but has brightened to 16.2. Vanmunster's observations showed large-amplitude (0.3 mag) variations.

1 0

[vsnet-newvar 9166] ATLAS22jee = Gaia22bfc: likely CV outburst
by Taichi Kato 02 Apr '22

02 Apr '22

ATLAS22jee = Gaia22bfc: likely CV outburst --- AT2022evo (= ATLAS22jee) ------- 17:0:26.44 9:45:12.6 2022-03-26.35 15.81 SDSS DSS VIZIER ------- known SN candidate, z unkown, discovered 2022/03/16.621, Type unknown http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22bfc/ Gaia22bfc AT2022evo 2022-03-22 03:54:25 255.11003 9.75379 15.83 unknown 2022-04-01 07:36:17 GALEX: 170026.451 +094513.27 (2000.0) GALEX_DR5_6375524993053230574 NUV=21.793(0.406) FUV=-(-)

1 0

[vsnet-newvar 9165] Gaia22bfp
by Taichi Kato 02 Apr '22

02 Apr '22

Gaia22bfp Bright transient (15.2) without a counterpart. Likely large-amplitude dwarf nova. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22bfp/ Gaia22bfp AT2022fpe 2022-03-22 16:55:55 307.70282 -35.85026 15.16 unknown 2022-04-01 18:33:08 bright blue hostless transient

1 0

[vsnet-newvar 9164] ASASSN-22el: UXOR star with very rare fading?
by Taichi Kato 02 Apr '22

02 Apr '22

ASASSN-22el: UXOR star with very rare fading? ASASSN-22el --- ------- 7:37:35.79 -4:31:17.1 2022-04-1.2 13.6 SDSS DSS VIZIER ------- Deep eclipse event, matches to PS1 g=13.3, The full ASAS-SN light curve and the last 100 days. 073735.745 -043117.54 (2000.0) Gaia_EDR3_3057084127033805824 plx=0.251(0.019) dismod=13.0 pmra=-1.772(0.017) pmdec=0.616(0.013) G=12.964 BP=13.255 RP=12.503 2MASS 073735.744 -043117.53 (2000.0) 11.866 11.489 11.384 Short fading in 2017 Sep.

1 0

[vsnet-newvar 9163] ZTF J190628.19-083649.7 = Gaia22beu: UGSS star with prominent secondary
by Taichi Kato 01 Apr '22

01 Apr '22

ZTF J190628.19-083649.7 = Gaia22beu: UGSS star with prominent secondary From ZTF data, Porb = 0.2622809(6) d. Double-wave modulations (amplitude 0.6 mag) + orbital hump. Another outburst in 2019 June in ZTF data.

1 0

[vsnet-newvar 9162] ASASSN-22ek
by Taichi Kato 01 Apr '22

01 Apr '22

ASASSN-22ek 1+ mag brightening in 2021 Nov. in ZTF data. ASASSN-22ek --- ------- 9:47:8.83 23:31:52.3 2022-03-30.16 15.04 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.0, g>18.2 on 2022-03-27.15, g=16.6 on 2022-03-28.36, g=14.2 on 2022-03-29.31, g=15.3 on 2022-03-30.16 ASASSN-22ek 20220327.15 <182g ASN ASASSN-22ek 20220328.36 166g ASN ASASSN-22ek 20220329.31 142g ASN ASASSN-22ek 20220330.16 153g ASN 094708.835 +233151.80 (2000.0) Gaia_DR2_641464292054953600 plx=3.569(2.170) dismod=7.2 pmra=-17.531(2.166) pmdec=9.429(1.644) G=20.276 BP=19.954 RP=19.942 094708.834 +233151.80 (2000.0) Gaia_EDR3_641464292054953600 plx=1.906(0.843) dismod=8.6 pmra=-19.489(0.745) pmdec=12.183(0.463) G=20.215 BP=20.186 RP=20.221 094708.996 +233149.84 (2000.0) GALEX_DR5_6377671250488068931 NUV=19.737(0.143) FUV=-(-) SDSS: 19.695 19.700 19.576 19.388 19.232

1 0