April 2022 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16352] NGCA-V19: polar
by Taichi Kato 05 Apr '22

05 Apr '22

NGCA-V19: polar From ZTF data. Porb=0.0557435(1) d. Broad single maximum per cycle.

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[vsnet-campaign-dn 16351] V803 Cen likely superoutburst
by Taichi Kato 05 Apr '22

05 Apr '22

V803 Cen likely superoutburst YYYYMMDD(UT) mag observer 20220323.440 154 (Rod Stubbings) 20220323.7501 <140C (Masayuki Moriyama) 20220331.458 135 (Rod Stubbings) 20220403.0973 12.95C (Masao Funada)

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[vsnet-campaign-dn 16350] ASASSN-18jc superoutburst
by Taichi Kato 05 Apr '22

05 Apr '22

ASASSN-18jc superoutburst YYYYMMDD(UT) mag observer 20220315.8198 <147c (Yutaka Maeda) 20220316.7929 <135c (Yutaka Maeda) 20220401.7444 142c (Yutaka Maeda) 20220401.7444 142c (Yutaka Maeda) 20220403.7470 142cG (Yutaka Maeda) 20220403.7470 142cG (Yutaka Maeda) Gaia22bhj AT2022gjk 2022-03-25 16:19:00 260.08954 -15.15801 13.44 19.23 0.15 CV 2022-04-04 08:06:21 6 mag outburst in confirmed CV ASASSN-18jc http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22bhj/

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[vsnet-campaign-dn 16349] 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.

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[vsnet-campaign-dn 16348] 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=-(-)

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[vsnet-campaign-dn 16347] GQ CVn outburst
by Taichi Kato 02 Apr '22

02 Apr '22

GQ CVn outburst Rapidly fading in Gaia data? Last superoutburst was in 2021 Apr.-May. Gaia22bfh AT2021lfd 2022-03-21 20:53:05 190.80018 43.53315 15.13 18.21 1.57 CV 2022-04-01 07:36:45 6 mag outburst in confirmed CV ASASSN-13ao = GQ CVn http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22bfh/

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[vsnet-campaign-dn 16346] 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

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[vsnet-campaign-dn 16345] 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.

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[vsnet-campaign-dn 16344] 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

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vsnet-campaign-dn April 2022