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[vsnet-campaign-dn 16043] ASASSN-21sz
by Taichi Kato 12 Oct '21

12 Oct '21

ASASSN-21sz ASASSN-21sz --- ------- 21:48:30.31 -35:38:49.3 2021-10-7.14 13.56 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR2 G=18.6, g>17.8 on 2021-10-05.08, g=14.0 on 2021-10-06.11, g=14.1 on 2021-10-07.17, g=14.6 on 2021-10-10.05 ASASSN-21sz 20211005.08 <178g ASN ASASSN-21sz 20211007.17 141g ASN ASASSN-21sz 20211010.05 146g ASN 214830.443 -353848.98 (2000.0) Gaia_DR2_6587981306620492672 plx=2.019(0.320) dismod=8.5 pmra=29.370(0.384) pmdec=-19.011(0.399) G=18.596 BP=18.625 RP=18.304 214830.444 -353848.99 (2000.0) Gaia_EDR3_6587981306620492672 plx=1.926(0.170) dismod=8.6 pmra=29.685(0.155) pmdec=-18.968(0.107) G=18.618 BP=18.722 RP=18.449 214831.2 -353851 (2000.0) 1RXS_J214831.3-353852 0.055 0.39 0.62

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[vsnet-campaign-dn 16042] Re: LL And rapid fading
by Patrick Schmeer 11 Oct '21

11 Oct '21

LL Andromedae (UGWZ) https://www.aavso.org/vsx/index.php?view=detail.top&oid=260 The rapid fading was already reported by me on Sept. 9 (vsnet-alert 26311). It started around 2021 September 9.1 UT according to AAVSO data: https://app.aavso.org/webobs/results/?star=000-BBB-961 Time-resolved photometry or at least daily snapshots are still encouraged. Clear skies, Patrick ------------ Filipp Romanov wrote on Monday, 11 October 2021 at 15:58:48 UTC: Based on my observations (remotely from Burke-Gaffney Observatory, Canada), rapid fading of LL And started after 2021-10-08: 2021 10 05.28754 14.76 V 2021 10 06.31925 14.84 V 2021 10 07.09830 14.94 V 2021 10 08.25946 15.06 V 2021 10 09.14966 15.50 V I reported these observations and my other multicolour photometric observations in the [vsnet-obs 94323]. With best regards, Filipp Romanov (Russia). ------------ Taichi Kato wrote on Sunday, 10 October 2021 at 23:54:33 UTC: LL And rapid fading Itoh-san's most recent observation on Sep. 10 indicated that the object faded to 17th mag. Please keep an eye on this object to look for possible rebrightening(s).

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[vsnet-campaign-dn 16041] LL And rapid fading
by Taichi Kato 10 Oct '21

10 Oct '21

LL And rapid fading Itoh-san's most recent observation on Sep. 10 indicated that the object faded to 17th mag. Please keep an eye on this object to look for possible rebrightening(s).

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[vsnet-campaign-dn 16040] ASASSN-19ax: temporary brightening
by Taichi Kato 09 Oct '21

09 Oct '21

ASASSN-19ax: temporary brightening According to Itoh-san's observations, this object showed a 1-mag brightening on Oct. 4 and 5. Similar two brightenings were apparently present in ASAS-3 and ZTF data during the 2019 Jan. superoutburst. The phenomenon appears to be different from post-superoutburst rebrightenings in WZ Sge (and a few SU UMa) stars.

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[vsnet-campaign-dn 16039] ASASSN-14lb: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 09 Oct '21

09 Oct '21

Dear colleagues, I have just finished analysing my unfiltered CMOS observations of ASASSN-14lb, obtained on 2021, October 08/09 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera under clear skies. My observations were triggered by [vsnet-alert 26304]. Regular superhumps with an amplitude of 0.28 mag are clearly visible in the resulting light curve, establishing ASASSN-14lb as a new SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined superhump period of 0.0704 +/- 0.0006d. The object was at mag CV = 16.5 on Oct 09th. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com

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[vsnet-campaign-dn 15985] LL And outburst
by Taichi Kato 09 Oct '21

09 Oct '21

LL And outburst Of course, this is a top-priority target! The 2004 superoutburst occurred in June and no good observations were reported. See https://ui.adsabs.harvard.edu/abs/2004PASJ...56S.135K/abstract for the 1993 superoutburst. Determination of the superhump period is very important. YYYYMMDD(UT) mag observer 20210908.9111 <139 (Eddy Muyllaert) 20210909.701 <153 (Hiroyuki Maehara) 20210909.9424 <146 (Eddy Muyllaert) 20210910.219 <17.90C (Gary Poyner) 20210910.9257 <146 (Eddy Muyllaert) 20210910.9375 <146 (Jose Ripero) 20210911.9299 <146 (Eddy Muyllaert) 20210914.901 128C (Jeremy Shears)

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[vsnet-campaign-dn 16037] V701 Tau likely superoutburst
by Taichi Kato 08 Oct '21

08 Oct '21

V701 Tau likely superoutburst Superoutburst expected now. YYYYMMDD(UT) mag observer 20210928.7483 <164c (Yutaka Maeda) 20211001.6187 <155c (Yutaka Maeda) 20211002.6199 <157c (Yutaka Maeda) 20211003.6558 <161c (Yutaka Maeda) 20211004.0138 <163C (Masao Funada) 20211004.6114 <153c (Yutaka Maeda) 20211005.6009 <156c (Yutaka Maeda) 20211006.5957 151c (Yutaka Maeda)

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[vsnet-campaign-dn 16036] MASTER OT J174816.22+501723.3 superoutburst
by Taichi Kato 08 Oct '21

08 Oct '21

MASTER OT J174816.22+501723.3 superoutburst YYYYMMDD(UT) mag observer 20210924.4265 <162c (Yutaka Maeda) 20211001.1563 19.704zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211001.4063 <159c (Yutaka Maeda) 20211002.4068 152:cG (Yutaka Maeda) 20211003.1365 15.745zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211003.4050 156:c (Yutaka Maeda) 20211003.8547 15.55C (Masao Funada) 20211004.4200 <148c (Yutaka Maeda) 20211005.4050 152:cG (Yutaka Maeda) 20211006.4033 156:c (Yutaka Maeda)

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[vsnet-campaign-dn 16035] HV Aur superoutburst
by Taichi Kato 08 Oct '21

08 Oct '21

HV Aur superoutburst YYYYMMDD(UT) mag observer 20210928.7783 <163c (Yutaka Maeda) 20211001.6479 <156c (Yutaka Maeda) 20211002.6480 <160c (Yutaka Maeda) 20211003.6839 145cG (Yutaka Maeda) 20211004.6395 146cG (Yutaka Maeda) 20211005.041 15.06C (Gary Poyner) 20211005.0416 15.03C (Masao Funada) 20211005.6288 152:cG (Yutaka Maeda) 20211006.038 15.35C (Gary Poyner) 20211006.6234 151c (Yutaka Maeda)

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[vsnet-campaign-dn 16034] ASASSN-14lb rare outburst
by Taichi Kato 08 Oct '21

08 Oct '21

ASASSN-14lb rare outburst Last seen in outburst on 2018 Sep. 16 (17.0 mag). YYYYMMDD(UT) mag observer 20210918.7208 <155c (Yutaka Maeda) 20210919.7449 <155c (Yutaka Maeda) 20210923.6947 <165c (Yutaka Maeda) 20210924.6981 <154c (Yutaka Maeda) 20210928.7029 <169c (Yutaka Maeda) 20211001.6734 <156c (Yutaka Maeda) 20211002.6735 <157c (Yutaka Maeda) 20211003.7093 <163c (Yutaka Maeda) 20211004.6647 158:c (Yutaka Maeda) 20211005.6540 160c (Yutaka Maeda) 20211006.6485 157:c (Yutaka Maeda)

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