August 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27941] 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-alert 27940] 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-alert 27939] 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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[vsnet-alert 27938] V1028 Cyg superoutburst
by Taichi Kato 09 Aug '23

09 Aug '23

V1028 Cyg superoutburst YYYYMMDD(UT) mag observer 20230801.583 <170C (Mitsutaka Hiraga) 20230802.4144 <16.554g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230802.5673 <165c (Yutaka Maeda) 20230802.7879 <174C (Masayuki Moriyama) 20230803.4070 <17.425g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230803.8088 <169C (Masayuki Moriyama) 20230804.7786 <173C (Masayuki Moriyama) 20230805.4094 14.122g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.510 143C (Mitsutaka Hiraga) 20230805.8073 139C (Masayuki Moriyama) 20230805.998 141 (Gary Poyner) 20230806.9229 137 (Eddy Muyllaert) 20230807.023 137 (Gary Poyner) 20230807.076 13.46C (Gary Poyner) 20230807.9167 137 (Eddy Muyllaert) 20230808.166 13.73C (Gary Poyner)

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[vsnet-alert 27937] RU Hor superoutburst
by Taichi Kato 09 Aug '23

09 Aug '23

RU Hor superoutburst (But near the end) YYYYMMDD(UT) mag observer 20230723.0594 <18.418g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230723.3235 <18.396g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230726.3162 13.876g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230728.3117 13.835g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230730.3163 13.791g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230731.3003 13.985g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230801.2995 14.071g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230802.0480 14.307g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230802.3030 14.330g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230803.2886 14.446g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.0309 14.757g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230805.487 141 (Rod Stubbings) 20230807.0224 14.822g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230807.540 143 (Rod Stubbings) 20230808.0889 14.929g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230808.560 145 (Rod Stubbings)

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[vsnet-alert 27936] TCP J16294031-4022063: superhump period
by Taichi Kato 07 Aug '23

07 Aug '23

TCP J16294031-4022063: superhump period Superhump period is 0.05378(1) d (shorter one-day alias is less likely considering the Porb distribution of CVs). Observers: Josch Habmsch

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[vsnet-alert 27935] PNV J19030433-3102187: superhump period
by Taichi Kato 07 Aug '23

07 Aug '23

PNV J19030433-3102187: superhump period The object apparently started to show superhumps on Aug. 1. The current mean period is 0.05777(2) d (amplitude 0.15 mag). Observers: Itoh-san, Josch Habmsch, Greg Bolt

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[vsnet-alert 27934] TCP J16420534+8156125: period of early superhumps
by Taichi Kato 07 Aug '23

07 Aug '23

TCP J16420534+8156125: period of early superhumps P=0.06087(1) d. Typical double-wave modulations Amplitude 0.06 mag. The period suggests a WZ Sge star with multiple rebrightenings. Observers: Itoh-san, Stephen Brincat, Kiyota-san, Magnus Larsson, Tonny Vanmunster.

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[vsnet-alert 27933] Vend51 = AT 2023oom: new possible nova in the Andromeda galaxy?
by FIDRICH Robert 06 Aug '23

06 Aug '23

Dear friends, I found a 19.5 magnitudes bright extragalactic nova candidate on my 10x120s stacked images made with Luminance filter using the 0.51m telescope (T11) of UDRO on 2023 August 5 09:02UT. Sprectroscopy, precise astrometry and follow-up observations are urgently needed! More details: http://vendegcsillagkereso.blogspot.com/2023/08/nwew-possible-nova-in-andro… https://www.wis-tns.org/object/2023oom http://www.cbat.eps.harvard.edu/unconf/followups/J00465260+4201428.html Clear skies, Robert Fidrich HAA/VSS

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[vsnet-alert 27932] PNV J19030433-3102187: ordinary superhumps (WZ Sge)
by Taichi Kato 04 Aug '23

04 Aug '23

PNV J19030433-3102187: ordinary superhumps (WZ Sge) The most recent data by Itoh-san on Aug. 3 clearly showed ordinary superhumps. Long waiting time is consistent with the WZ Sge-type classification. (We have received observations from Josch Hambsch, which have not yet been analyzed. More details later).

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vsnet-alert August 2023