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[vsnet-alert 26405] CRTS J175633.3+572927 possible superoutburst
by Taichi Kato 12 Nov '21

12 Nov '21

CRTS J175633.3+572927 possible superoutburst Possible type from ZTF data. YYYYMMDD(UT) mag observer 20211103.1229 17.439zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211103.1401 17.669zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211105.0982 17.208zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211107.1200 16.682zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211109.1362 16.602zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.1208 16.717zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26404] CRTS J224753.9+235522 likely superoutburst
by Taichi Kato 12 Nov '21

12 Nov '21

CRTS J224753.9+235522 likely superoutburst The light curve looks likes a superoutburst. YYYYMMDD(UT) mag observer 20211015.1007 <180C (Eddy Muyllaert) 20211102.2383 15.465zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211102.2780 15.252zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211102.2822 15.214zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.1736 15.704zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.1760 15.681zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.2397 15.537zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.1524 15.738zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.1638 15.758zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.2258 15.948zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.2273 15.998zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.1297 16.147zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.1760 16.540zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26403] ASASSN-19sk: rapid fading
by Taichi Kato 12 Nov '21

12 Nov '21

ASASSN-19sk: rapid fading YYYYMMDD(UT) mag observer 20211104.5250 <161c (Yutaka Maeda) 20211105.8132 <143 (Eddy Muyllaert) 20211107.5478 124cG (Yutaka Maeda) 20211107.7905 126CV (NMW survey) 20211108.1338 14.293zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.8014 129 (Eddy Muyllaert) 20211109.887 14.71C (Gary Poyner) Itoh-san reported observations on two night. No superhump-like variation was seen on rapid fading.

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[vsnet-alert 26402] ASASSN-14fq likely superoutburst (since Oct. 31)
by Patrick Schmeer 12 Nov '21

12 Nov '21

ASASSN-14fq (UGSU:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=399161 Recent ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/30026e02-aae2-4312-9f9b-98222… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF20aaukual/ The current outburst started on 2021 October 31. Previous outbursts were recorded from 2014 August 16 to 25 and from 2020 March 19 to April 5 (rebrightening observed on April 15 by Gaia, see below). Time-resolved photometry is required. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M ------- Am Freitag, 17. April 2020, 11:47:32 MESZ hat Patrick Schmeer pasc1312-aavso(a)yahoo.de via vsnet-alert <vsnet-alert(a)ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben: ASASSN-14fq (UGWZ:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=399161 Gaia detection (Gaia20buz): http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20buz/ ASASSN-14fq 20200322.224 15.42G Gaia ASASSN-14fq 20200415.255 17.46G Gaia ASASSN-14fq 20200415.329 17.41G Gaia Complete ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/light_curves/8f0c73ae-a13b-4ebc-b9c3-f5bfcbec7d32 A previous (long) outburst was recorded 2014 August 16–25. Time-resolved photometry is encouraged (at least snapshots). Clear skies, Patrick

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[vsnet-alert 26401] ASASSN-21uh: most likely an AM CVn object with a WZ Sge-type superoutburst or a WZ Sge object with type-E rebrightenings
by Naoto Kojiguchi 11 Nov '21

11 Nov '21

ASASSN-21uh: most likely an AM CVn object with a WZ Sge-type superoutburst or a WZ Sge object with type-E rebrightenings Taguchi-san found that ASASSN-21uh had a temporary dip a week after the outburst by using ZTF data (ALeRCE) and ASAS-SN data. This object is most likely an AM CVn object with a WZ Sge-type superoutburst or a WZ Sge object with type-E rebrightenings. Spectroscopy is encouraged. ALeRCE: https://alerce.online/object/ZTF21ackbkbn ASAS-SN Sky Patrol (20 days): https://asas-sn.osu.edu/sky-patrol/coordinate/ce4f98bb-179e-4b61-8d6b-8d7ce… ASAS-SN Sky Patrol (all): https://asas-sn.osu.edu/sky-patrol/coordinate/f25d1265-e2e0-4d06-965d-58ea5… ASASSN-21uh --- ------- 19:34:30.71 47:39:6.9 2021-10-31.18 15.5 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.4, g>18.3 on 2021-10-30.22, g=15.9 on 2021-10-31.19. IDs: 053741.285 +473906.626 PS1_DR1_165182936280562816 g=20.3844(0.0177) r=--(--) i=--(--) z=20.5024(0.1437) y=--(--) 053744.551 +473909.642 PS1_DR1_165182936289423720 g=--(--) r=21.7877(0.2405) i=--(--) z=--(--) y=19.4201(0.1117) 053741.522 +473906.720 PS1_DR2_165182936280562816 g=22.2087(0.078856) r=22.2866(0.087181) i=23.2862(0.255626) z=25.0042(2.79944) y=21.9475(0.389282) ASASSN-21uh 20211030.223 <17.247g ASN ASASSN-21uh 20211031.185 15.793g ASN (outburst) ASASSN-21uh 20211031.210 16.218o ATF ASASSN-21uh 20211102.202 16.250zr ZLR ASASSN-21uh 20211102.505 16.10:C Myy ASASSN-21uh 20211103.214 16.137g ASN ASASSN-21uh 20211103.540 16.44C Myy ASASSN-21uh 20211104.159 16.525zr ZLR ASASSN-21uh 20211104.255 16.695o ATF ASASSN-21uh 20211104.438 16.430G GIA ASASSN-21uh 20211104.564 <145C Myy ASASSN-21uh 20211105.172 <16.864g ASN (dip) ASASSN-21uh 20211106.099 18.599zr ZLR ASASSN-21uh 20211106.135 19.281zg ZLR ASASSN-21uh 20211106.268 18.964cy ATF ASASSN-21uh 20211106.551 <167C Myy ASASSN-21uh 20211107.152 16.331g ASN (rebrightening) ASASSN-21uh 20211108.115 16.622zr ZLR ASASSN-21uh 20211108.197 16.841o ATF ASASSN-21uh 20211108.198 16.412zg ZLR ASASSN-21uh 20211108.213 16.785g ASN ASASSN-21uh 20211110.101 16.638g ASN ASASSN-21uh 20211110.198 17.130o ATF (ASN: ASAS-SN Sky Patrol, ATF: Atlas forced photometry, GIA: Gaia Alerts, Myy: Masayuki Moriyama, ZLR: Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26400] ASASSN-21um: new SU UMa-type dwarf nova
by Taichi Kato 10 Nov '21

10 Nov '21

ASASSN-21um: new SU UMa-type dwarf nova Tamas Tordai has reported observations. The object shows 0.17-mag superhumps with a period of 0.087(1) d.

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[vsnet-alert 26399] V347 Aur
by Taichi Kato 09 Nov '21

09 Nov '21

V347 Aur https://www.aavso.org/aavso-alert-notice-759 This object was classified as a "Mira" (of course, not correct) in ZTF variable star catalog. The ZTF data indeed showed Mira-like variation. There was a maximum reaching zg=12.6 in 2018 Nov. The present behavior may not be so special.

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[vsnet-alert 26398] ASASSN-18yi outburst!
by Taichi Kato 09 Nov '21

09 Nov '21

ASASSN-18yi outburst! Eclipsing SU UMa star above the period gap (P=0.16825 d). http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fbh/ Gaia21fbh AT2021advs 2021-11-06 22:31:24 20.46764 -33.93771 15.36 18.84 1.08 CV 2021-11-07 20:20:40 outburst in confirmed CV ASASSN-18yi, previous outburst in lightcurve

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[vsnet-alert 26397] V606 Vul rapid fading: more complete data set
by Taichi Kato 09 Nov '21

09 Nov '21

V606 Vul rapid fading: more complete data set YYYYMMDD(UT) mag observer 20211031.506 119 (Hiroyuki Maehara) 20211031.7556 123 (Eddy Muyllaert) 20211101.3590 10.878Rc (Yasuo Sano) 20211101.3595 12.989B (Yasuo Sano) 20211101.3597 12.113V (Yasuo Sano) 20211101.3603 10.802C (Yasuo Sano) 20211101.6277 122V (Masayuki Moriyama) 20211101.6318 118C (Masayuki Moriyama) 20211101.7514 120 (Eddy Muyllaert) 20211101.962 119 (Gary Poyner) 20211102.433 128 (Takuichiro Onishi) 20211102.474 124 (Yoshiyasu Sato) 20211102.6065 12.73V (Masayuki Moriyama) 20211102.7576 124 (Eddy Muyllaert) 20211102.850 124 (Gary Poyner) 20211103.431 122 (Takuichiro Onishi) 20211103.494 124 (Yoshiyasu Sato) 20211103.6018 12.20V (Masayuki Moriyama) 20211104.408 132 (Takuichiro Onishi) 20211104.5663 136V (Masayuki Moriyama) 20211104.750 124 (Gary Poyner) 20211105.3628 10.930Rc (Yasuo Sano) 20211105.428 122 (Yoshiyasu Sato) 20211105.4457 12.979B (Yasuo Sano) 20211105.4459 12.169V (Yasuo Sano) 20211105.4464 11.025C (Yasuo Sano) 20211105.7514 123 (Eddy Muyllaert) 20211106.4210 13.09V (Minoru Sato) 20211106.5764 13.69V (Masayuki Moriyama) 20211106.5781 12.58Rc (Masayuki Moriyama) 20211106.5796 11.90Ic (Masayuki Moriyama) 20211106.5991 <14.51B (Masayuki Moriyama) 20211107.3990 15.152B (Yasuo Sano) 20211107.3998 12.872C (Yasuo Sano) 20211107.4003 14.282V (Yasuo Sano) 20211107.4006 12.565Rc (Yasuo Sano) 20211107.419 <143 (Takuichiro Onishi) 20211107.492 143 (Hiroyuki Maehara)

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[vsnet-alert 26338] 1RXS J063214.8+253620 (UG) first outburst since 2012
by Kirill Sokolovsky 08 Nov '21

08 Nov '21

Hi, The dwarf nova 1RXS J063214.8+253620 was found in outburst on the NMW survey images (135mm f/2.0 lens + unfiltered ST-8300M CCD): YYYYMMDD.D(UT) mag 20211020.9384 12.6CV The ASAS-SN lightcurve https://asas-sn.osu.edu/sky-patrol/coordinate/7272c442-c9b2-4ec3-b8a8-9780a… suggests the outburst started on 2021-10-19 and this is the first outburst since the discovery of this dwarf nova in 2012. The ASAS-SN data also suggest the presence of periodic modulation in minimum light. The quiescent K2 lightcurve of 1RXS J063214.8+253620 was modeled by https://ui.adsabs.harvard.edu/abs/2018AJ....156..153D/abstract VSX record for 1RXS J063214.8+253620: https://www.aavso.org/vsx/index.php?view=detail.top&oid=276839 Some of the previous messages on vsnet-alert discussing the 2012 outburst: http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/14158 http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/14171 http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/14172 Best wishes, Kirill Sokolovsky, Stanislav Korotkiy, Olga Smolyankina

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