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[vsnet-campaign-dn 17455] PS1-3PI J063334.87-230546.4 = Gaia DR3 2924954955730613376 = TCP J06333486-2305449: SU UMa star
by Taichi Kato 04 Nov '23

04 Nov '23

PS1-3PI J063334.87-230546.4 = Gaia DR3 2924954955730613376 = TCP J06333486-2305449: SU UMa star According to Itoh-san's observations on Nov. 3, this object showed superhumps with an amplitude of 0.17 mag. The period of 0.0597(4) d excludes the possibility of an AM CVn star as I suggested earlier. The period was close to the half of this superhump period and the variations may have been early superhumps, though two maxima were almost equal. The nature will be clarified when a better measurement of the superhump period is obtained.

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[vsnet-campaign-dn 17454] PS1-3PI J063334.87-230546.4 = Gaia DR3 2924954955730613376 = TCP J06333486-2305449: superoutburst from a most likely AM CVn star
by Taichi Kato 02 Nov '23

02 Nov '23

PS1-3PI J063334.87-230546.4 = Gaia DR3 2924954955730613376 = TCP J06333486-2305449: superoutburst from a most likely AM CVn star Kiyota-san, Itoh-san and Josch Hambsch have reported observations. The data show superhumps with a period of 0.02942(2) d. Amplitude 0.043 mag. The low amplitude seems to suggest a low mass ratio, consistent with an AM CVn star. The data are still somewhat insufficient and more observations are needed.

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[vsnet-campaign-dn 17453] ASASSN-23gr: new SU UMa-type dwarf nova
by Taichi Kato 14 Oct '23

14 Oct '23

ASASSN-23gr: new SU UMa-type dwarf nova Josch Hambsch has reported observations. The data show superhumps with a period of 0.06345(5) d. The amplitude is rather small (0.04 mag) and may be still growing.

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[vsnet-campaign-dn 17452] MASTER OT J183342.09+654019.1 superoutburst
by Taichi Kato 26 Aug '23

26 Aug '23

MASTER OT J183342.09+654019.1 superoutburst Superhumps of this object were observed in 2021 Apr., but not so well. YYYYMMDD(UT) mag observer 20230803.2927 17.662g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.3107 17.534g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230814.4402 17.555g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230822.4005 15.150g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) (forwarded message) === From: <andrew_simon(a)univ.kiev.ua> Date: Fri, 25 Aug 2023 22:43:27 +0300 Dear Dr. Taichi Kato, According to my observations in the Lisnyky observational station during the last two nights it looks like the object Gaia19cuu now in superoutburst. From the observations superhumps can be easily detected on the images attached to this letter. Data from the Gaia shows previous outbursts with the amplitude of 4-5 magnitudes (https://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19cuu/) Also data from Gaia Followup for 7 Jul 2019 submitted by Liam Hardy shows superhumps, due to these data I started to follow this object. ( https://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19cuu/followup) ZTF also detected multiple outbursts in the light curve as well as current outburst. https://lasair-ztf.lsst.ac.uk/objects/ZTF18aatluwz/ After analysing the data I found 0.068d period for 2023-08-23 and 0.077d period for 2023-08-24. But due to the relatively short duration of observations these determinations can be not precise. Obtained data relatively to the comp.star I also attached to this letter. This night it is cloudy in Kyiv so I have no possibility to continue observations. But I hope that the object will appear to be interesting for observations over the world. Best regards, Andrew Simon.

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[vsnet-campaign-dn 17451] TCP J16420534+8156125 ordinary superhumps
by Taichi Kato 12 Aug '23

12 Aug '23

TCP J16420534+8156125 ordinary superhumps The most recent observations by Itoh-san on Aug. 12 showed ordinary superhumps.

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[vsnet-campaign-dn 17436] TCP J16420534+8156125 bright likely dwarf nova
by Taichi Kato 09 Aug '23

09 Aug '23

TCP J16420534+8156125 bright likely dwarf nova http://cbat.eps.harvard.edu/unconf/followups/J16420534+8156125.html 164209.215 +815556.26 (2000.0) Gaia_DR2_1710719047756794368 plx=1.700(0.682) dismod=8.8 pmra=-13.473(1.951) pmdec=25.647(2.137) G=20.587 BP=20.469 RP=20.125 164209.212 +815556.28 (2000.0) Gaia_EDR3_1710719047756794368 plx=1.896(0.572) dismod=8.6 pmra=-13.299(0.746) pmdec=25.917(0.841) G=20.494 BP=20.613 RP=20.253

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[vsnet-campaign-dn 17449] TY PsA superoutburst
by Taichi Kato 09 Aug '23

09 Aug '23

TY PsA superoutburst YYYYMMDD(UT) mag observer 20230804.4195 15.543zr (ZTF Alert DC mag (Masci+ 2019)) 20230805.4013 15.690g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.4326 15.663zg (ZTF Alert DC mag (Masci+ 2019)) 20230805.8474 15.230g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230806.3172 11.890g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230807.526 110 (Rod Stubbings) 20230807.8910 11.626g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230808.546 110 (Rod Stubbings)

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[vsnet-campaign-dn 17448] OY Car superoutburst
by Taichi Kato 09 Aug '23

09 Aug '23

OY Car superoutburst (UGSU+E) YYYYMMDD(UT) mag observer 20230722.9790 15.445g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230725.462 156 (Rod Stubbings) 20230727.9735 15.753g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230729.9662 15.185g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230803.7036 15.194g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.435 122 (Rod Stubbings) 20230807.451 116 (Rod Stubbings) 20230808.412 116 (Rod Stubbings)

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[vsnet-campaign-dn 17447] BE Oct superoutburst
by Taichi Kato 09 Aug '23

09 Aug '23

BE Oct superoutburst YYYYMMDD(UT) mag observer 20230801.1356 <16.865g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230801.4323 <16.760g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230802.1363 <16.313g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230802.3219 <16.599g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230803.1365 16.608g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230803.1926 16.624g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230804.9392 16.354g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.9314 15.946g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230806.8808 15.652g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230806.9262 15.562g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230807.469 156 (Rod Stubbings) 20230808.0625 15.590g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230808.465 159 (Rod Stubbings)

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[vsnet-campaign-dn 17446] V1141 Aql likely superoutburst
by Taichi Kato 09 Aug '23

09 Aug '23

V1141 Aql likely superoutburst YYYYMMDD(UT) mag observer 20230804.5798 <177C (Masayuki Moriyama) 20230805.7579 <168C (Masayuki Moriyama) 20230808.446 150 (Rod Stubbings)

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