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

[vsnet-alert 27912] Re: Jose Ripero's data will be excluded from my database from now on
by Taichi Kato 19 Jul '23

19 Jul '23

> These observations were his first ones in 2023 and > he didn't know that the object had already been in bright phase. > I must doubt the reliability of his observations and > don't import his data into my personal (not official) > database from now on to prevent the propagation of errors > (or "pseudo-data"). Please don't feel bad. > the intervals were 0.0007 day (I initially thought that they > were spaced by 1 min, but were not; exactly 0.0007 day). Turned out to be exactly 1 min.

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[vsnet-alert 27911] Re: Jose Ripero's data will be excluded from my database from now on
by Taichi Kato 19 Jul '23

19 Jul '23

> These observations were his first ones in 2023 and > he didn't know that the object had already been in bright phase. > I must doubt the reliability of his observations and > don't import his data into my personal (not official) > database from now on to prevent the propagation of errors > (or "pseudo-data"). Please don't feel bad. Sorry for using vsnet-alert, but this is an important issue (for users of VSNET data to use or not to use his observations). I checked the intervals of his observations on July 16 and found that the great majority (more than 70%) of the intervals were 0.0007 day (I initially thought that they were spaced by 1 min, but were not; exactly 0.0007 day). The cases of interval=0 were the second most abundant. So he apparently automatically created the times of observations by adding a constant of 0.0007 day. Any user would be able to confirm these statistics.

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[vsnet-alert 27910] Jose Ripero's data will be excluded from my database from now on
by Taichi Kato 19 Jul '23

19 Jul '23

> This time again, Jose Ripero apparently didn't know the outburst > and continued copying earlier observations. I found another example of copying observations. (V742 Lyr, as I pointed out already in vsnet-obs, is yet another) RZ Vul: YYYYMMDD(UT) mag observer 20230708.038 129 (Gary Poyner) 20230708.9632 <139 (Jose Ripero) 20230710.9382 <139 (Jose Ripero) 20230712.032 128 (Gary Poyner) 20230712.9521 <139 (Jose Ripero) 20230714.9579 129 (Jose Ripero) 20230716.7859 122C (Masayuki Moriyama) 20230716.9472 124 (Jose Ripero) These observations were his first ones in 2023 and he didn't know that the object had already been in bright phase. I must doubt the reliability of his observations and don't import his data into my personal (not official) database from now on to prevent the propagation of errors (or "pseudo-data"). Please don't feel bad.

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[vsnet-alert 27909] EC05200-5205 superoutburst, but already fading
by Taichi Kato 19 Jul '23

19 Jul '23

EC05200-5205 superoutburst, but already fading YYYYMMDD(UT) mag observer 20230630.4468 16.502g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.4359 14.373g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.4298 13.550g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230716.828 156 (Rod Stubbings)

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[vsnet-alert 27908] V1040 Cen superoutburst
by Taichi Kato 19 Jul '23

19 Jul '23

V1040 Cen superoutburst YYYYMMDD(UT) mag observer 20230705.8381 14.531g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.0911 14.293g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7127 14.512g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.428 123 (Rod Stubbings) 20230712.492 128 (Rod Stubbings) 20230717.437 130 (Rod Stubbings)

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[vsnet-alert 27907] NSV 35 likely superoutburst
by Taichi Kato 19 Jul '23

19 Jul '23

NSV 35 likely superoutburst Slowly rising superoutburst like the 2020 Oct.-Nov. one? YYYYMMDD(UT) mag observer 20230715.606 160 (Rod Stubbings) 20230716.731 142 (Rod Stubbings) 20230717.558 135 (Rod Stubbings)

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[vsnet-alert 27906] NSV 18024: still in outburst and slow fading
by Taichi Kato 19 Jul '23

19 Jul '23

NSV 18024: still in outburst and slow fading YYYYMMDD(UT) mag observer 20230711.357 120 (Rod Stubbings) 20230712.365 127 (Rod Stubbings) 20230717.362 134 (Rod Stubbings)

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[vsnet-alert 27905] V632 Cyg superoutburst
by Taichi Kato 19 Jul '23

19 Jul '23

V632 Cyg superoutburst YYYYMMDD(UT) mag observer 20230714.9347 <143 (Jose Ripero) 20230715.9799 <143 (Eddy Muyllaert) 20230716.7609 132cG (Yutaka Maeda) 20230716.7965 140C (Masayuki Moriyama) 20230716.9250 <143 (Jose Ripero) 20230717.033 133 (Gary Poyner) 20230717.5403 13.87C (Masayuki Moriyama) 20230717.9556 135 (Eddy Muyllaert) 20230718.010 13.90C (Gary Poyner) This time again, Jose Ripero apparently didn't know the outburst and continued copying earlier observations.

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[vsnet-alert 27904] V2276 Sgr: entered plateau
by Taichi Kato 19 Jul '23

19 Jul '23

V2276 Sgr: entered plateau According to Josch Hambsch's observations. Entered a plateau (or standstill) on July 16 before the ending of the superoutburst. The favored period is 0.01963 d (amplitude 0.05 mag). All the behavior strengthens the AM CVn-type classification. The next superoutburst is expected in October and high-cadence time-resolved photometry during the earliest part of the superoutburst will detect superhumps with larger amplitudes.

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[vsnet-alert 27903] ASASSN-23ff: new SU UMa-type dwarf nova
by Taichi Kato 18 Jul '23

18 Jul '23

ASASSN-23ff: new SU UMa-type dwarf nova Josch Hambsch has reported observations. Superhumps with a period of 0.05667(2) d are clearly present (amplitude 0.18 mag).

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vsnet-alert July 2023