September 2021 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26253] LL And: early superhumps
by Taichi Kato 17 Sep '21

17 Sep '21

LL And: early superhumps Crimean Astrophys. Obs. team has reported observations. The combined data yielded a period of 0.0552(1) d, in agreement with the orbital period of 0.055055 d. The profile is doubly humped and the amplitude was 0.025 mag. Further observations are encouraged.

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[vsnet-alert 26252] LL And variation
by Taichi Kato 16 Sep '21

16 Sep '21

LL And variation Kyoto U. team and Tamas Tordai have reported observations. Although some variations were present, the period was not the same as the orbital period. Since the runs were not very long, more observations would clarify whether they were early superhumps or not.

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[vsnet-alert 26250] ASASSN-18vb: new SU UMa-type dwarf nova
by Taichi Kato 15 Sep '21

15 Sep '21

ASASSN-18vb: new SU UMa-type dwarf nova Tamas Tordai has reported observations. The object shows superhumps with a period of 0.0832(7) d and an amplitude of 0.21 mag.

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[vsnet-alert 26249] MASTER OT J221811.12+654219.9 superoutburst
by Taichi Kato 15 Sep '21

15 Sep '21

MASTER OT J221811.12+654219.9 superoutburst YYYYMMDD(UT) mag observer 20210908.3480 19.897zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.5962 <163c (Yutaka Maeda) 20210909.6506 <166c (Yutaka Maeda) 20210910.1999 15.073zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.2206 15.005zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210912.2642 14.551zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26248] CRTS J212625.1+201948 superoutburst
by Taichi Kato 15 Sep '21

15 Sep '21

CRTS J212625.1+201948 superoutburst ER UMa-like object. Supercycle about 80 d. YYYYMMDD(UT) mag observer 20210908.1957 18.380zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.1971 18.441zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.1947 15.825zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210912.1973 15.875zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210914.2242 16.068zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26247] ATLAS18sxj outburst
by Taichi Kato 15 Sep '21

15 Sep '21

ATLAS18sxj outburst Past outburst in 2018 Aug. looked like a normal outburst of an SU UMa star (from ZTF data). The current one may be a superoutburst. YYYYMMDD(UT) mag observer 20210912.1982 16.378zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210914.2209 16.522zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26246] Re: ASASSN-21rt = ZTF21acahuzg
by Taichi Kato 15 Sep '21

15 Sep '21

Re: ASASSN-21rt = ZTF21acahuzg GALEX ID: 222658.619 +225446.50 (2000.0) GALEX_DR5_6376193502565371439 NUV=22.400(0.425) FUV=-(-)

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[vsnet-alert 26243] ASASSN-21rt = ZTF21acahuzg
by Naoto Kojiguchi 15 Sep '21

15 Sep '21

ASASSN-21rt = ZTF21acahuzg Large outburst amplitude of 7 mag. Possible WZ Sge-type object. ASASSN-21rt --- ------- 22:26:58.89 22:54:47.5 2021-09-14.07 15.15 ------- CV candidate, matches to SDSS g=22.0, g>17.5 on 2021-09-08.28, g=17.5 on 2021-09-10.28, g=15.1 on 2021-09-11.88, g=15.4 on 2021-09-14.097. IDs: 222658.803 +225448.160 SDSSJ222658.80+225448.1 ObsDate=2004.7123 u=23.406(0.890) g=22.070(0.120) r=22.308(0.232) i=22.225(0.299) z=22.223(0.713) 222658.805 +225448.056 SDSSJ222658.80+225448.0 ObsDate=2008.7511 u=22.644(0.399) g=22.970(0.196) r=22.392(0.172) i=22.351(0.259) z=22.637(0.741) YYYYMMDD(UT) mag observer 20210908.285 <16.563g ASN 20210908.512 20.849o ATF 20210910.225 18.806zg ZLR 20210910.286 <17.301g ASN 20210910.355 17.180cy ATF 20210910.372 17.177zr ZLR 20210911.887 15.086g ASN 20210912.257 15.108zg ZLR 20210912.407 15.476o ATF 20210914.097 15.265g ASN 20210914.245 15.552zr ZLR 20210914.275 15.308zg ZLR ATF (ATLAS Forced Photometry (Tonry et al. 2018)) ASN (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) ZLR (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26242] MASTER OT J055845.55+391533.4 superoutburst
by Taichi Kato 14 Sep '21

14 Sep '21

MASTER OT J055845.55+391533.4 superoutburst The 2021 Jan.-Feb. and 2018 Apr. superoutbursts showed a dip and a long rebrightening. YYYYMMDD(UT) mag observer 20210828.8465 <142c (Yutaka Maeda) 20210829.8457 <146c (Yutaka Maeda) 20210830.8308 <162c (Yutaka Maeda) 20210831.8157 <156c (Yutaka Maeda) 20210909.7884 146:cG (Yutaka Maeda) 20210911.1820 14.20cG (Masao Funada)

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[vsnet-alert 26241] V611 Her superoutburst continues
by Taichi Kato 14 Sep '21

14 Sep '21

V611 Her superoutburst continues YYYYMMDD(UT) mag observer 20210903.2672 19.121zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.1864 14.734zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.1865 14.734zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.1948 15.002zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.1950 15.002zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.2269 14.932zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.2270 14.932zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.4386 149cG (Yutaka Maeda) 20210909.1639 15.178zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.4973 153:c (Yutaka Maeda) 20210909.5450 153V (Masayuki Moriyama) 20210909.5455 155C (Masayuki Moriyama) 20210909.913 15.21C (Gary Poyner) 20210909.9132 15.11C (Masao Funada) 20210911.1636 15.323zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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vsnet-alert September 2021