- vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 17282] EW Hya: indeed SU UMa star
by Taichi Kato 17 May '23

17 May '23

EW Hya: indeed SU UMa star Greg Bolt has reported observations. The object showed superhumps with a period of 0.081 d and an amplitude of 0.17 mag on May 15. Further observations are requested to refine the period.

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[vsnet-campaign-dn 17281] TCPJ17552445-4743255: possible WZ Sge? peak in April
by Taichi Kato 17 May '23

17 May '23

TCPJ17552445-4743255: possible WZ Sge? peak in April YYYYMMDD(UT) mag observer 20230417.9655 15.000o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.9673 15.023o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.9703 14.993o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.0018 14.996o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1933 15.259c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1961 15.278c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1989 15.262c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.2041 15.241c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.4206 15.304c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.3746 16.372c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.3773 16.425c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.3835 16.437c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.3946 16.416c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4011 16.257c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4043 16.267c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4075 16.295c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4107 16.283c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230427.0213 16.808o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230427.0232 16.753o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230427.0588 16.738o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230427.0748 16.692o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.9252 17.376o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.9419 17.415o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.9447 17.479o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.9687 17.258o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.3293 16.975c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.3395 16.932c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.3427 16.890c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.3483 16.848c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9250 17.521o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9269 17.281o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9303 17.415o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9317 17.664o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9342 17.674o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9355 17.372o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9394 17.651o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.9446 17.528o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.9385 17.735o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.9726 17.604o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.9907 17.620o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-campaign-dn 17280] Re: V548 Pav bright outburst
by Taichi Kato 17 May '23

17 May '23

Re: V548 Pav bright outburst YYYYMMDD(UT) mag observer 20230514.3410 <18.250g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.3204 14.083g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.599 142 (Rod Stubbings) 20230516.3314 14.067g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) Berto, the location is 211212.998 -663804.18 (2000.0) Gaia_DR2_6400875939749808256 plx=1.501(0.239) dismod=9.1 pmra=-3.542(0.282) pmdec=8.801(0.524) G=18.798 BP=19.090 RP=18.161 211212.998 -663804.17 (2000.0) Gaia_EDR3_6400875939749808256 plx=1.071(0.094) dismod=9.9 pmra=-2.708(0.100) pmdec=8.431(0.124) G=18.650 BP=18.891 RP=18.024 211213.038 -663803.63 (2000.0) GALEX_DR5_6383898878981180820 NUV=19.421(0.071) FUV=19.595(0.115)

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[vsnet-campaign-dn 17279] ZTF19actaznc outburst: dip or rebrightening
by Taichi Kato 16 May '23

16 May '23

ZTF19actaznc outburst: dip or rebrightening (Gaia detection) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bud/ Gaia23bud AT2023imp 2023-05-01 16:13:38 321.84744 37.76632 18.22 20.15 0.65 unknown 2023-05-15 09:50:11 Outburst in candidate CV ZTF19actaznc YYYYMMDD(UT) mag observer 20230411.4472 16.997zr (ZTF Alert DC mag (Masci+ 2019)) 20230411.4710 16.967zg (ZTF Alert DC mag (Masci+ 2019)) 20230416.4556 17.248zr (ZTF Alert DC mag (Masci+ 2019)) 20230416.4860 17.285zg (ZTF Alert DC mag (Masci+ 2019)) 20230418.5994 17.349c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.6137 17.197c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.6215 17.213c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6048 17.284c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6109 17.356c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6150 17.396c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6263 17.360c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.5854 17.451c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.5886 17.405c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.5918 17.379c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.6038 17.271c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5593 17.627c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5625 17.607c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5680 17.599c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5703 17.544c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5735 17.582c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5763 17.624c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5772 17.620c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5823 17.644c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.4326 18.138zr (ZTF Alert DC mag (Masci+ 2019)) 20230501.4681 18.372zg (ZTF Alert DC mag (Masci+ 2019)) 20230502.6122 18.801o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.6194 18.768o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.6236 18.759o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.5890 18.863o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.5964 18.842o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5655 18.673o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5691 18.298o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5792 18.580o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5856 18.630o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.4347 18.401zg (ZTF Alert DC mag (Masci+ 2019)) 20230513.5545 18.102o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.5572 18.009o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.5599 17.931o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.5818 18.046o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.5960 18.259o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.6118 18.121o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.6160 18.121o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-campaign-dn 17278] V548 Pav bright outburst
by Taichi Kato 16 May '23

16 May '23

V548 Pav bright outburst The 2022 Oct.-Nov. outburst with similar brightness was a long outburst. Possible SU UMa? YYYYMMDD(UT) mag observer 20230514.3410 <18.250g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.3204 14.083g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.599 142 (Rod Stubbings)

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[vsnet-campaign-dn 17277] MASTER OT J081110.46+660008.5: multiple rebrightening, short superoutburst interval
by Taichi Kato 15 May '23

15 May '23

MASTER OT J081110.46+660008.5: multiple rebrightening, short superoutburst interval Based on ATLAS, ZTF and ASAS-SN. The 2021 superoutburst was followed by multiple rebrightenings. A new superoutburst was found in 2017 in ATLAS and ASAS-SN. This interval was short for a WZ Sge star with multiple rebrightenings.

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[vsnet-campaign-dn 17276] ASASSN-22ak period
by Taichi Kato 15 May '23

15 May '23

ASASSN-22ak period Josch Hambsch has reported additional data with a higher cadence. Although the period is not directly apparent to the eyes, a period analysis using all the data appears to give a consistent period of 0.04128(4) d (amplitude 0.06 mag, slower rise and steeper fade). This period is the same as reported in 2022 Dec. (vsnet-alert 27243). The double period appears to be excluded by the rapid fading in 2022. The small amplitude may have been due to observations more than 10 d after the peak. I suspect that this object is an EI Psc star from this period. The outburst behavior is very unusual.

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[vsnet-campaign-dn 17275] PS1-3PIJ185013.38+242220.2 = DDE 163: unusual object (double outburst)
by Taichi Kato 15 May '23

15 May '23

PS1-3PIJ185013.38+242220.2 = DDE 163: unusual object (double outburst) Using ATLAS data, I noticed that the bright outburst in 2022 Mar.-Apr. was a double outburst peaking at 13.8 on Mar. 28, fading to mag 17 and 3-d outburst again. The overall feature is inconsistent with the suggested SU UMa-type classification. It resemble that of an AM CVn star but without clear rebrightenings (there was some hint of a fading tail). Other outburst were also unusual. The 2021 Feb. one had two peaks (ZTF+ATLAS) and there were other faint complex-shaped outbursts. There were past ZTF time-series data in quiescence without a particular period.

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[vsnet-campaign-dn 17274] V1000 Aql: IW And-type standstill and dip
by Taichi Kato 15 May '23

15 May '23

V1000 Aql: IW And-type standstill and dip Not unprecedented. Long standstill in this object is relatively rare. YYYYMMDD(UT) mag observer 20230403.0968 16.028g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230406.0970 16.045g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230408.4632 16.501zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.3224 16.209g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230410.4215 16.768zr (ZTF Alert DC mag (Masci+ 2019)) 20230413.3067 15.943g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.5170 15.934g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.8282 <168C (Masayuki Moriyama) 20230417.4558 16.798zr (ZTF Alert DC mag (Masci+ 2019)) 20230417.4818 16.542zg (ZTF Alert DC mag (Masci+ 2019)) 20230419.0709 15.854g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230420.3968 15.674g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230420.4609 16.450zr (ZTF Alert DC mag (Masci+ 2019)) 20230422.3994 15.233g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230422.4586 15.602zg (ZTF Alert DC mag (Masci+ 2019)) 20230424.4166 15.305g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230425.4531 15.952zr (ZTF Alert DC mag (Masci+ 2019)) 20230425.4739 15.827zg (ZTF Alert DC mag (Masci+ 2019)) 20230427.4220 16.959zg (ZTF Alert DC mag (Masci+ 2019)) 20230427.4726 17.869zr (ZTF Alert DC mag (Masci+ 2019)) 20230429.0579 <17.242g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230429.4487 19.249zg (ZTF Alert DC mag (Masci+ 2019)) 20230504.0210 <14.822g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.0210 <14.919g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.0210 <15.386g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230505.2419 15.488g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230507.2461 16.184g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.4626 16.111g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230513.7012 <161C (Masayuki Moriyama)

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[vsnet-campaign-dn 17273] NY Her superoutburst
by Taichi Kato 14 May '23

14 May '23

NY Her superoutburst (ER UMa-like object) YYYYMMDD(UT) mag observer 20230503.4169 18.477zr (ZTF Alert DC mag (Masci+ 2019)) 20230504.3777 <16.992g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230508.3743 15.822g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.3606 15.975g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.6196 159:c (Yutaka Maeda) 20230510.5690 16.056g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.6718 163:C (Masayuki Moriyama) 20230511.0804 15.284g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230511.4629 15.963zg (ZTF Alert DC mag (Masci+ 2019)) 20230511.6454 <151c (Yutaka Maeda) 20230513.6119 <156C (Masayuki Moriyama) 20230514.5432 16.323g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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