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

[vsnet-alert 26421] 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-alert 26420] 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-alert 26419] 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-alert 26418] 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-alert 26417] 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-alert 26416] 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-alert 26413] AY Ori
by Hiroyuki Maehara 12 Nov '21

12 Nov '21

According to Kojima-san, AY Ori (CTTS) has brightened to 13.7 mag. object YYYYMMDD(UT) mag code ORIAY 20211017.750 144c TKo ORIAY 20211105.682 142c TKo ORIAY 20211110.586 137c TKo Observer: Tadashi Kojima (Gunma, Japan) Instruments: f.l.=300mm lens + Canon EOS 6D This brightening was also detected by ASAS-SN (Shappee et al., 2014, ApJ 788, 48 and Kochanek et al., 2017, PASP 129, 104502). https://asas-sn.osu.edu/sky-patrol/coordinate/2fb1d045-6dd0-4cf5-b190-aa030…

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[vsnet-alert 26409] V347 Aur light curve
by Taichi Kato 12 Nov '21

12 Nov '21

V347 Aur light curve ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/9d1c40e3-d651-420c-8aa5-e8a8f… The events look nearly periodic. Caused by an eccentric orbiting secondary?

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[vsnet-alert 26411] 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-alert 26410] 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-alert November 2021