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

[vsnet-alert 27917] RX Cha superoutburst
by Taichi Kato 24 Jul '23

24 Jul '23

RX Cha superoutburst YYYYMMDD(UT) mag observer 20230708.9625 <16.405g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.9927 <17.800g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230710.7327 <17.766g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7291 <18.018g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7672 <17.985g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230719.397 148 (Rod Stubbings) 20230721.451 148 (Rod Stubbings) 20230722.385 148 (Rod Stubbings)

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[vsnet-alert 27916] TCP J16294031-4022063: unusually reddened SU UMa-type dwarf nova?
by Taichi Kato 24 Jul '23

24 Jul '23

TCP J16294031-4022063: unusually reddened SU UMa-type dwarf nova? Josch Hambsch has reported observations. The data showed regular 0.23-mag superhumps with a period of 0.0543(4) d. This result, however, is strange since this object is apparently reddened like a nova: YYYYMMDD(UT) mag observer 20230716.5893 14.73V (Masayuki Moriyama) 20230716.5904 14.21Rc (Masayuki Moriyama) 20230716.5914 13.68Ic (Masayuki Moriyama) 20230716.5925 15.06B (Masayuki Moriyama) If this is a reddened SU UMa-type dwarf nova, the object should be fairly close. The absence of a bright quiescent counterpart would be problematic. Further observations are strongly encouraged.

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[vsnet-alert 27915] TCP J18425840+0958555: new WZ Sge-type dwarf nova
by Taichi Kato 24 Jul '23

24 Jul '23

TCP J18425840+0958555: new WZ Sge-type dwarf nova Itoh-san has reported observations. This object showed 0.13-mag early superhumps with a period of 0.0570(3) d.

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[vsnet-alert 27914] BP CrA: standstill ended in June somewhat like IW And star
by Taichi Kato 20 Jul '23

20 Jul '23

BP CrA: standstill ended in June somewhat like IW And star YYYYMMDD(UT) mag observer 20230523.9175 14.269g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230524.3440 14.358g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230525.3297 14.392g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230526.9121 14.275g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.1708 14.405g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.3433 14.315g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.9037 14.407g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.1667 14.374g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.2440 14.92cG (Masao Funada) 20230528.9102 14.266g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230530.2143 14.358g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230601.2480 14.436g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.3123 14.481g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3383 14.368g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230609.3535 14.417g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.0771 14.612g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.4160 14.461g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.3545 14.360g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.0784 14.150g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230616.0056 14.026g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230617.0625 13.750g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230617.4278 13.813g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230618.2130 13.742g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230618.428 138 (Rod Stubbings) 20230618.7157 142C (Masayuki Moriyama) 20230619.1721 13.761g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230622.7972 14.514g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230623.4110 14.858g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230623.9431 14.579g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230624.3400 15.049g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230625.0766 14.876g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230626.0351 14.939g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230627.0391 15.215g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.9854 14.003g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.2333 14.012g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.0092 14.993g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.7580 14.882g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.2330 15.187g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7559 14.819g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.3121 15.158g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.3300 14.994g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.0850 15.025g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.1524 14.697g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.1006 13.868g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7595 13.959g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230712.396 140 (Rod Stubbings) 20230716.758 159 (Rod Stubbings) 20230717.410 159 (Rod Stubbings) 20230719.385 151 (Rod Stubbings)

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[vsnet-alert 27913] ST Cha standstill
by Taichi Kato 20 Jul '23

20 Jul '23

ST Cha standstill YYYYMMDD(UT) mag observer 20230703.6975 13.941g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230704.076 14.06C (Gary Poyner) 20230704.0773 14.29cG (Masao Funada) 20230704.7084 14.176g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.0501 14.283g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.7007 14.404g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7166 14.449g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7401 14.397g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7481 14.295g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230710.7327 14.286g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.417 143 (Rod Stubbings) 20230711.7291 14.212g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7672 14.298g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230712.496 144 (Rod Stubbings) 20230715.683 143 (Rod Stubbings) 20230716.764 143 (Rod Stubbings) 20230717.424 143 (Rod Stubbings) 20230719.396 143 (Rod Stubbings)

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[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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