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

[vsnet-alert 27624] ZTF23aaefkam recent data
by Taichi Kato 13 Apr '23

13 Apr '23

ZTF23aaefkam recent data YYYYMMDD(UT) mag observer 20230327.6121 15.198o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.6153 15.183o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.6209 15.193o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.6388 15.225o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.5905 17.127o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.5959 17.383o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.5996 17.170o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.8409 <159C (Masayuki Moriyama)

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[vsnet-alert 27623] ASASSN-23cn recent data
by Taichi Kato 13 Apr '23

13 Apr '23

ASASSN-23cn recent data YYYYMMDD(UT) mag observer 20230410.7881 15.730o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.7910 16.038o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.7982 15.839o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.8097 15.868o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.0238 15.935c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.0271 16.060c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.0325 15.976c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.0430 16.069c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.4798 15.96C (Masayuki Moriyama)

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[vsnet-alert 27622] BT CrB likely superoutburst
by Taichi Kato 13 Apr '23

13 Apr '23

BT CrB likely superoutburst UGSU+E YYYYMMDD(UT) mag observer 20230329.3247 19.011zg (ZTF Alert DC mag (Masci+ 2019)) 20230408.3995 17.269zg (ZTF Alert DC mag (Masci+ 2019)) 20230408.4348 17.351zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.3453 17.103zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.4020 17.183zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.4025 17.143zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27621] ASASSN-19ph likely superoutburst
by Taichi Kato 13 Apr '23

13 Apr '23

ASASSN-19ph likely superoutburst Type from ATLAS data. Supercycle about 140 d. YYYYMMDD(UT) mag observer 20230408.4651 16.996zr (ZTF Alert DC mag (Masci+ 2019)) 20230408.4923 17.135zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.4333 16.418zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27620] ASASSN-19pd outburst
by Taichi Kato 13 Apr '23

13 Apr '23

ASASSN-19pd outburst Possible superoutburst. YYYYMMDD(UT) mag observer 20230329.4544 17.011zr (ZTF Alert DC mag (Masci+ 2019)) 20230329.4553 16.993zr (ZTF Alert DC mag (Masci+ 2019)) 20230401.803 <171C (Mitsutaka Hiraga) 20230408.4440 17.240zr (ZTF Alert DC mag (Masci+ 2019)) 20230408.4445 17.245zr (ZTF Alert DC mag (Masci+ 2019)) 20230408.4890 17.174zg (ZTF Alert DC mag (Masci+ 2019)) 20230408.4894 17.218zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.4243 17.267zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.4319 17.297zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.4763 17.237zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.4911 17.212zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27619] ASASSN-VJ065749.18+213318.6 brightening in standstill
by Taichi Kato 12 Apr '23

12 Apr '23

ASASSN-VJ065749.18+213318.6 brightening in standstill YYYYMMDD(UT) mag observer 20230306.1141 16.066o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.1259 16.232o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.1318 16.269o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.1350 16.115o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.2927 16.292o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.2954 16.252o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3010 16.296o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3114 16.182o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.8034 16.314o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.8065 16.147o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.8246 16.265o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.8300 16.164o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0784 16.028o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0812 16.073o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0862 16.072o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0971 16.103o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.2573 16.120zg (ZTF Alert DC mag (Masci+ 2019)) 20230311.3038 15.965o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3066 16.019o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3127 16.023o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3227 15.957o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7977 16.048c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8013 15.990c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8077 16.165c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8178 16.118c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8270 16.160c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0255 16.319o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0407 16.246o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0439 16.354o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0493 16.395o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1932 15.540zg (ZTF Alert DC mag (Masci+ 2019)) 20230314.6422 172:C (Masayuki Moriyama) 20230315.3023 16.569o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3055 16.557o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3119 16.515o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3229 16.553o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0258 15.732o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0290 15.790o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0418 15.755o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0507 15.853o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3082 15.925o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3114 15.910o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3168 15.912o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3274 15.912o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.5669 160C (Masayuki Moriyama) 20230320.7959 16.274c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.7977 15.883c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.7991 15.895c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.8009 16.005c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.8045 15.983c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.8096 15.903c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.8191 15.985c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0458 16.142o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0484 16.130o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0537 16.151o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0637 16.066o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.0307 16.192o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.0349 16.216o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.0409 16.143o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.0538 16.191o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.2585 16.202o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.2617 16.223o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.2669 16.177o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.2798 16.186o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.5920 162C (Masayuki Moriyama) 20230327.2416 15.969o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.2449 16.058o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.2505 16.115o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.2638 16.077o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230331.2820 16.166o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230331.2858 16.204o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230331.2938 16.239o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230331.3046 16.277o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2927 16.365o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.3044 16.301o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.5543 158C (Masayuki Moriyama) 20230404.0036 16.028o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0173 15.924o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0206 15.669o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0261 15.857o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0378 15.904o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.9865 16.152o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.9961 16.117o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.9998 16.085o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.0238 16.036o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.2903 15.819o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.3023 16.006o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2386 15.926o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2423 15.982o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2477 15.983o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2596 16.018o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.0247 16.064o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.0279 16.106o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.0338 15.950o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.0533 16.044o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.5762 159C (Masayuki Moriyama) 20230409.2626 16.038o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2658 16.107o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2712 16.105o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.5772 159C (Masayuki Moriyama) 20230410.0318 16.012o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.0374 16.102o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.0443 16.101o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.0485 16.007o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.5427 160C (Masayuki Moriyama) 20230411.2785 15.903c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230411.2878 15.822c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230411.2987 15.906c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27618] BH Lyn getting very faint
by Taichi Kato 12 Apr '23

12 Apr '23

BH Lyn getting very faint YYYYMMDD(UT) mag observer 20230107.3225 16.367zr (ZTF Alert DC mag (Masci+ 2019)) 20230107.4738 17.205zg (ZTF Alert DC mag (Masci+ 2019)) 20230115.4270 17.160o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.4288 17.152o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.4324 17.061o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.4563 17.811o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.4835 17.417o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.4871 17.481o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.4930 17.680o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5085 17.659o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.4634 16.953o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.4666 16.701o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.5182 17.475o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.5237 17.446o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.2797 17.226zg (ZTF Alert DC mag (Masci+ 2019)) 20230125.3205 16.810zr (ZTF Alert DC mag (Masci+ 2019)) 20230127.2998 17.323zr (ZTF Alert DC mag (Masci+ 2019)) 20230202.4453 16.765zg (ZTF Alert DC mag (Masci+ 2019)) 20230205.2606 17.453zg (ZTF Alert DC mag (Masci+ 2019)) 20230205.3478 17.042zr (ZTF Alert DC mag (Masci+ 2019)) 20230208.1138 17.064zg (ZTF Alert DC mag (Masci+ 2019)) 20230208.1748 16.854zr (ZTF Alert DC mag (Masci+ 2019)) 20230210.2270 16.770zr (ZTF Alert DC mag (Masci+ 2019)) 20230210.2642 17.239zg (ZTF Alert DC mag (Masci+ 2019)) 20230211.8002 172:C (Masayuki Moriyama) 20230217.2289 15.517zr (ZTF Alert DC mag (Masci+ 2019)) 20230217.2594 15.634zg (ZTF Alert DC mag (Masci+ 2019)) 20230219.2439 17.181zr (ZTF Alert DC mag (Masci+ 2019)) 20230219.3257 15.824zg (ZTF Alert DC mag (Masci+ 2019)) 20230310.2409 17.282zr (ZTF Alert DC mag (Masci+ 2019)) 20230310.3046 15.330zg (ZTF Alert DC mag (Masci+ 2019)) 20230312.3433 19.238o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3466 18.942o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3521 19.070o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3620 18.978o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.2011 16.941zg (ZTF Alert DC mag (Masci+ 2019)) 20230316.3833 19.003o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.3864 19.018o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.3935 18.743o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.4033 18.910o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.1738 17.405zr (ZTF Alert DC mag (Masci+ 2019)) 20230328.3239 19.053o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.5961 <169C (Masayuki Moriyama) 20230410.3305 19.228o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.3342 19.087o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.3413 18.945o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.3565 18.860o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27617] Re: ASASSN-15dq: early superhumps or growing ordinary superhumps?
by Taichi Kato 12 Apr '23

12 Apr '23

Re: ASASSN-15dq: early superhumps or growing ordinary superhumps? According to Itoh-san's observation on Apr. 11, superhumps had grown. The profile was that of growing ordinary superhumps, not early superhumps.

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[vsnet-alert 27616] TCP J17233734+1902555: ordinary superhumps
by Taichi Kato 12 Apr '23

12 Apr '23

TCP J17233734+1902555: ordinary superhumps Most recent data from Josch Hambsch and Itoh-san detected superhumps. The period since Apr. 10 is 0.0560(1) d. This value does not support vsnet-alert 27589. This early claim of possible early superhumps was apparently affected by data with relatively low quality (weather problem etc.). A new analysis using the data up to Apr. 4 yielded a period of 0.05451(5) d (amplitude 0.05 mag), which still needs to be confirmed due to the limited quality of the data.

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[vsnet-alert 27615] ESO-HA 1830 = Gaia23bjz: unusual large-amplitude emission-line object
by Taichi Kato 12 Apr '23

12 Apr '23

ESO-HA 1830 = Gaia23bjz: unusual large-amplitude emission-line object http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bjz/ Amplitude 0.8 mag. Not irregular and several candidate periods are present in ATLAS data (such as 0.4644 d). 2MASS 054545.493 -075401.77 (2000.0) 13.555 12.452 11.616 054545.4 -075401 (2000.0) ATOJ086.4395-07.9005 dubious c=18.328 o=16.766 P(LS)=1.205589 rms=0.48 054545.495 -075401.81 (2000.0) Gaia_DR2_3012764080328211712 plx=2.140(0.186) dismod=8.3 pmra=1.277(0.327) pmdec=-3.659(0.309) G=18.029 BP=19.273 RP=16.694 054545.495 -075401.82 (2000.0) Gaia_EDR3_3012764080328211712 plx=2.279(0.128) dismod=8.2 pmra=1.364(0.107) pmdec=-2.873(0.105) G=18.142 BP=19.137 RP=16.707 The object is in M42 region and the distance is the same. Proper motions are different. (But apparently not a CV)

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