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

[vsnet-alert 26688] ASASSN-22ek
by Taichi Kato 01 Apr '22

01 Apr '22

ASASSN-22ek 1+ mag brightening in 2021 Nov. in ZTF data. ASASSN-22ek --- ------- 9:47:8.83 23:31:52.3 2022-03-30.16 15.04 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.0, g>18.2 on 2022-03-27.15, g=16.6 on 2022-03-28.36, g=14.2 on 2022-03-29.31, g=15.3 on 2022-03-30.16 ASASSN-22ek 20220327.15 <182g ASN ASASSN-22ek 20220328.36 166g ASN ASASSN-22ek 20220329.31 142g ASN ASASSN-22ek 20220330.16 153g ASN 094708.835 +233151.80 (2000.0) Gaia_DR2_641464292054953600 plx=3.569(2.170) dismod=7.2 pmra=-17.531(2.166) pmdec=9.429(1.644) G=20.276 BP=19.954 RP=19.942 094708.834 +233151.80 (2000.0) Gaia_EDR3_641464292054953600 plx=1.906(0.843) dismod=8.6 pmra=-19.489(0.745) pmdec=12.183(0.463) G=20.215 BP=20.186 RP=20.221 094708.996 +233149.84 (2000.0) GALEX_DR5_6377671250488068931 NUV=19.737(0.143) FUV=-(-) SDSS: 19.695 19.700 19.576 19.388 19.232

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[vsnet-alert 26689] ZTF J190628.19-083649.7 = Gaia22beu: UGSS star with prominent secondary
by Taichi Kato 01 Apr '22

01 Apr '22

ZTF J190628.19-083649.7 = Gaia22beu: UGSS star with prominent secondary From ZTF data, Porb = 0.2622809(6) d. Double-wave modulations (amplitude 0.6 mag) + orbital hump. Another outburst in 2019 June in ZTF data.

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[vsnet-alert 26687] MM Sco superhumps
by Taichi Kato 31 Mar '22

31 Mar '22

MM Sco superhumps Josch Hambsch has reported observations. The object started showing superhumps on Mar. 30. The amplitudes of superhumps (if present) were still very small on Mar. 29.

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[vsnet-alert 26686] ASASSN-22eb
by Taichi Kato 30 Mar '22

30 Mar '22

ASASSN-22eb Large outburst amplitude. ASASSN-22eb --- ------- 16:11:24.82 -22:45:57.6 2022-03-27.35 13.93 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.0, g>18.5 on 2022-03-26.25, g=14.3 on 2022-03-27.36, g=14.5 on 2022-03-28.18. ASASSN-22eb 20220326.25 <185g ASN ASASSN-22eb 20220327.36 143g ASN ASASSN-22eb 20220328.18 145g ASN

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[vsnet-alert 26685] ASASSN-22ea
by Taichi Kato 30 Mar '22

30 Mar '22

ASASSN-22ea Large outburst amplitude. ASASSN-22ea --- ------- 3:38:28.06 -45:54:23.8 2022-03-26.04 14.28 SDSS DSS VIZIER ------- CV candidate, matches to DES DR2 g=21,4, g>17.5 on 2022-03-23.05, g=14.5 on 2022-03-26.04, g=14.6 on 2022-03-27.03. ASASSN-22ea 20220323.05 <175g ASN ASASSN-22ea 20220326.05 145g ASN ASASSN-22ea 20220327.03 146g ASN

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[vsnet-alert 26684] Re: ASASSN-19yt outburst (since Mar. 16)
by Taichi Kato 30 Mar '22

30 Mar '22

Re: ASASSN-19yt outburst (since Mar. 16) > The current outburst began on 2022 March 16 according to ATLAS > forced photometry data. A rapid fading started on March 26. > The outburst duration is shorter than that of a standard UGSU > superoutburst. The light curve is that of an SS Cyg star and I had classified as such.

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[vsnet-alert 26680] MM Sco likely superoutburst
by Taichi Kato 29 Mar '22

29 Mar '22

MM Sco likely superoutburst YYYYMMDD(UT) mag observer 20220326.594 130 (Rod Stubbings)

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[vsnet-alert 26682] ASASSN-19yt outburst (since Mar. 16)
by Patrick Schmeer 29 Mar '22

29 Mar '22

ASASSN-19yt (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=1498802 Recent ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/b12b1094-0c9b-4216-9d5f-8f2d6… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF17aaagnwn/ The current outburst began on 2022 March 16 according to ATLAS forced photometry data. A rapid fading started on March 26. The outburst duration is shorter than that of a standard UGSU superoutburst. A previous outburst was observed from 2019 October 5 to 13. Follow-up observations are encouraged. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M ------- T. Kato wrote (vsnet-alert 23615, 2019 October 9): Re: ASASSN-19yt There is an XMM source. The present amplitude would suggest a dwarf nova. 061801.4 +222231 (2000.0) 2XMM_J061801.4+222231 err=0.8 5.523e-14 0.87 0.29 -0.22 -0.34

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[vsnet-alert 26681] TCP J05454551+5954307: ordinary superhumps
by Taichi Kato 29 Mar '22

29 Mar '22

TCP J05454551+5954307: ordinary superhumps Observations from Crimean Astrophys. Obs. indicate that ordinary superhump evolved on Mar. 27.

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[vsnet-alert 26679] DDE 35 bright
by Taichi Kato 25 Mar '22

25 Mar '22

DDE 35 bright Hiraga-san has pointed out that DDE 35 has been bright for a long time. This object was classified as an SU UUMa star in 2020 March, but superhumps were detected on two nights only. The nature is still unclear. YYYYMMDD(UT) mag observer 20210924.810 <168C (Mitsutaka Hiraga) 20211013.788 164C (Mitsutaka Hiraga) 20211014.756 162C (Mitsutaka Hiraga) 20211017.4744 17.279zr (Zwicky Transient Facility (Masci et al., 2019)) 20211017.4746 17.314zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211017.5133 17.213zg (Zwicky Transient Facility (Masci et al., 2019)) 20211017.5135 17.197zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211021.760 <170C (Mitsutaka Hiraga) 20211025.5161 16.856zr (Zwicky Transient Facility (Masci et al., 2019)) 20211025.5163 16.870zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211102.4792 19.440zr (Zwicky Transient Facility (Masci et al., 2019)) 20211104.4499 19.761zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.4499 19.832zg (Zwicky Transient Facility (Masci et al., 2019)) 20211104.4501 19.761zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.4673 19.365zr (Zwicky Transient Facility (Masci et al., 2019)) 20211104.4675 19.872zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.4564 20.066zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.769 <165C (Mitsutaka Hiraga) 20211110.5208 19.965zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211110.5210 19.965zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211112.4515 20.016zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211114.4319 19.941zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211114.5138 20.008zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211114.5139 20.008zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211120.3875 17.673zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211202.3444 16.398zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211202.3446 16.398zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211202.4508 16.024zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220114.615 168C (Mitsutaka Hiraga) 20220115.567 170C (Mitsutaka Hiraga) 20220212.3845 16.247zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220219.3496 16.311zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220226.2188 16.445zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220227.769 158C (Mitsutaka Hiraga) 20220228.4084 15.787zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220228.4738 15.858zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220302.472 164C (Mitsutaka Hiraga) 20220303.2741 16.310zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220309.703 159C (Mitsutaka Hiraga) 20220315.737 164C (Mitsutaka Hiraga) 20220316.6877 <164C (Masayuki Moriyama)

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