November 2021 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 8967] ZTFJ175758.83+242427.3 =Gaia21apv: eclipsing CV below the period gap
by Taichi Kato 14 Nov '21

14 Nov '21

ZTFJ175758.83+242427.3 =Gaia21apv: eclipsing CV below the period gap From ZTF data. Porb = 0.0850107(3) d. Min epoch = BJD 2458829.911. Likely UGSU:+E (eclipses are not as sharp as polars).

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[vsnet-newvar 8966] ASASSN-21uw
by Taichi Kato 13 Nov '21

13 Nov '21

ASASSN-21uw Large outburst amplitude. ASASSN-21uw --- ------- 0:42:29.02 -77:27:43.3 2021-11-11.26 13.74 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>18.3 on 2021-11-10.13, g=14.7 on 2021-11-10.79, g=14.0 on 2021-11-11.09, g=14.3 on 2021-11-11.75 ASASSN-21uw 20211110.13 <183g ASN ASASSN-21uw 20211110.79 147g ASN ASASSN-21uw 20211111.09 140g ASN ASASSN-21uw 20211111.75 143g ASN

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[vsnet-newvar 8965] MGAB-V955 most likely superoutburst
by Taichi Kato 13 Nov '21

13 Nov '21

MGAB-V955 most likely superoutburst Supercycle about 130 d. YYYYMMDD(UT) mag observer 20211025.6455 <166C (Masayuki Moriyama) 20211031.5906 <173C (Masayuki Moriyama) 20211104.1570 15.799zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.0983 15.808zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.1122 15.848zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2229 16.064zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 8964] MGAB-V225 most likely superoutburst
by Taichi Kato 13 Nov '21

13 Nov '21

MGAB-V225 most likely superoutburst Supercycle about 100 d. YYYYMMDD(UT) mag observer 20211111.2243 17.131zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 8963] Gaia21fcw brightening
by Taichi Kato 13 Nov '21

13 Nov '21

Gaia21fcw brightening YYYYMMDD(UT) mag observer 20210827.3218 19.950zr (Zwicky Transient Facility (Masci et al., 2019)) 20210827.3687 20.594zg (Zwicky Transient Facility (Masci et al., 2019)) 20210827.3691 20.365zg (Zwicky Transient Facility (Masci et al., 2019)) 20210829.2851 20.260zr (Zwicky Transient Facility (Masci et al., 2019)) 20210902.3259 20.555zg (Zwicky Transient Facility (Masci et al., 2019)) 20210902.3269 20.420zg (Zwicky Transient Facility (Masci et al., 2019)) 20210902.3273 20.644zg (Zwicky Transient Facility (Masci et al., 2019)) 20211104.2462 17.410zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.2471 17.423zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.1553 17.284zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.3030 17.231zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.3035 17.230zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.2198 16.561zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.2203 16.547zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.2238 16.535zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2421 16.036zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2426 16.020zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2585 16.045zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 8962] ASASSN-18zm most likely superoutburst
by Taichi Kato 13 Nov '21

13 Nov '21

ASASSN-18zm most likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20211104.2473 16.739zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.2483 16.739zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.2179 16.775zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.3037 16.659zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.3041 16.667zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.1561 16.878zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2015 17.476zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 8961] ASASSN-17ag superoutburst
by Taichi Kato 13 Nov '21

13 Nov '21

ASASSN-17ag superoutburst There were only single-night observations in the past. YYYYMMDD(UT) mag observer 20211030.4690 20.498zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211031.7467 <159c (Yutaka Maeda) 20211101.7631 <157c (Yutaka Maeda) 20211102.7342 <152c (Yutaka Maeda) 20211103.3433 19.881zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211103.7424 <164c (Yutaka Maeda) 20211104.7325 <152c (Yutaka Maeda) 20211106.7397 <162c (Yutaka Maeda) 20211107.3622 16.105zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211110.1042 14.88C (Eddy Muyllaert) 20211112.3826 15.514zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 8960] TCP J07363658+4151215 superhump period
by Taichi Kato 12 Nov '21

12 Nov '21

TCP J07363658+4151215 superhump period (=ASASSN-21um, vsnet-alert 26400) Using observations since Nov. 9 (Tamas Tordai and Kiyota-san), the superhump period is 0.08591(4) d. The period is unusually long for the outburst amplitude, but the large amplitude of superhumps excludes a low mass-ratio object.

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[vsnet-newvar 8959] ASASSN-21uq
by Taichi Kato 12 Nov '21

12 Nov '21

ASASSN-21uq ASASSN-21uq --- ------- 21:47:0.25 -17:9:52.7 2021-11-7.16 14.03 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>18.1 on 2021-11-06.10, g=14.3 on 2021-11-07.16, g=15.3 on 2021-11-09.83 ASASSN-21uq 20211106.10 <181g ASN ASASSN-21uq 20211107.16 143g ASN ASASSN-21uq 20211109.83 153g ASN

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[vsnet-newvar 8958] ASASSN-18yi: superhump + eclipse
by Taichi Kato 12 Nov '21

12 Nov '21

ASASSN-18yi: superhump + eclipse Josch Hambsch has reported observations. The object showed a superhump + eclipse. The current outburst is a superoutburst (first since 2018).

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vsnet-newvar November 2021