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

[vsnet-alert 27686] TCP J16064415-1611467: new SU UMa-type dwarf nova
by Taichi Kato 29 Apr '23

29 Apr '23

TCP J16064415-1611467: new SU UMa-type dwarf nova Itoh-san has reported observations. The object showed 0.2-mag variations with a period of 0.06 d. The profile resembles that of evolving ordinary superhumps, but the variations may be early superhumps. Further observations are needed to clarify the nature.

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[vsnet-alert 27685] FS Aur low state
by Taichi Kato 28 Apr '23

28 Apr '23

FS Aur low state Like 2018 Nov. and 2020 Jan.-Feb. 20230404.0000 16.422o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0073 16.437o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.0033 <16.607g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230405.2945 16.163o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2528 16.506o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2564 16.626o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2619 16.672o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.2750 16.442o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.5583 <152C (Masayuki Moriyama) 20230408.5705 160:C (Masayuki Moriyama) 20230409.2385 16.098o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2417 16.620o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2471 16.556o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2594 16.611o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.5732 161:C (Masayuki Moriyama) 20230409.9765 16.499o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.9811 16.764o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.9881 16.652o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.0016 16.615o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230410.2495 16.797g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230410.5522 <151C (Masayuki Moriyama) 20230411.2531 16.721c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230411.2559 16.737c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230411.2626 16.674c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230411.2741 16.755c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230412.4685 <151c (Yutaka Maeda) 20230412.5810 <154C (Masayuki Moriyama) 20230415.2956 17.068c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230415.2995 16.963c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230415.3273 16.697c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230415.3314 16.806c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230416.5678 <152C (Masayuki Moriyama) 20230417.2796 16.786c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.2830 16.850c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.2934 16.733c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.2987 16.800c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.5651 <151C (Masayuki Moriyama) 20230418.9690 <16.297g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230421.2928 16.907c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230421.2960 16.841c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230421.3024 16.847c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230426.5171 <162C (Masayuki Moriyama)

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[vsnet-alert 27684] HS Vir stopped outbursting recently
by Taichi Kato 28 Apr '23

28 Apr '23

HS Vir stopped outbursting recently SU UMa star. Since mid-Feb. YYYYMMDD(UT) mag observer 20230402.5418 149:c (Yutaka Maeda) 20230403.0436 15.716g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230408.5883 <152c (Yutaka Maeda) 20230408.7820 155C (Masayuki Moriyama) 20230409.6046 <148c (Yutaka Maeda) 20230409.7821 158C (Masayuki Moriyama) 20230410.5779 153:c (Yutaka Maeda) 20230412.474 156 (Rod Stubbings) 20230413.4127 15.935g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230413.635 153 (Rod Stubbings) 20230414.1922 15.418g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230414.460 154 (Rod Stubbings) 20230415.4551 15.957g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.7350 158C (Masayuki Moriyama) 20230417.6660 <151c (Yutaka Maeda) 20230417.724 155 (Rod Stubbings) 20230417.7985 <129C (Masayuki Moriyama) 20230418.2618 15.875g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230419.2752 15.642g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230419.7387 158C (Masayuki Moriyama) 20230420.4080 15.554g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230421.7875 155:C (Masayuki Moriyama) 20230422.4828 <144c (Yutaka Maeda) 20230423.4481 15.294g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230423.449 155 (Rod Stubbings) 20230426.4729 <145c (Yutaka Maeda) 20230426.7871 157C (Masayuki Moriyama)

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[vsnet-alert 27683] CRTSJ105550.1+095621: relatively rapid fading
by Taichi Kato 28 Apr '23

28 Apr '23

CRTSJ105550.1+095621: relatively rapid fading Data by Josch Hambsch. 0.4 mag fading per day. Probably unlikely superhumps.

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[vsnet-alert 27682] ASASSN-23df ATLAS detection
by Taichi Kato 28 Apr '23

28 Apr '23

ASASSN-23df ATLAS detection Fainter outburst in 2019 Jan. in ATLAS? YYYYMMDD(UT) mag observer 20230426.7416 16.815o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230426.7447 16.796o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230426.7504 16.893o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27681] MASTER OT J172758.09+380021.5 likely superoutburst
by Taichi Kato 28 Apr '23

28 Apr '23

MASTER OT J172758.09+380021.5 likely superoutburst Unusual ER UMa-like object. See also https://arxiv.org/abs/2304.07695 YYYYMMDD(UT) mag observer 20230416.6745 <149c (Yutaka Maeda) 20230416.8091 <145C (Masayuki Moriyama) 20230417.4991 17.983g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230417.6905 <154c (Yutaka Maeda) 20230421.7121 <157c (Yutaka Maeda) 20230422.6860 <160c (Yutaka Maeda) 20230426.6738 145cG (Yutaka Maeda) 20230426.7837 147C (Masayuki Moriyama)

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[vsnet-alert 27680] TCP J21032164+1823342 ATLAS detection
by Taichi Kato 27 Apr '23

27 Apr '23

TCP J21032164+1823342 ATLAS detection http://cbat.eps.harvard.edu/unconf/followups/J21032164+1823342.html YYYYMMDD(UT) mag observer 20230425.6022 14.457c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.6133 14.418c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.6233 14.377c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.6266 14.360c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 210321.579 +182331.13 (2000.0) Gaia_DR2_1765097658756842496 plx=1.939(0.699) dismod=8.6 pmra=8.626(1.215) pmdec=6.960(1.325) G=20.116 BP=20.364 RP=19.773 210321.580 +182331.13 (2000.0) Gaia_EDR3_1765097658756842496 plx=2.345(0.522) dismod=8.1 pmra=8.359(0.509) pmdec=5.870(0.502) G=20.078 BP=20.391 RP=19.840 210321.585 +182330.93 (2000.0) GALEX_DR5_6376510164063749933 NUV=21.075(0.277) FUV=21.265(0.410)

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[vsnet-alert 27679] CRTSJ105550.1+095621 superhump?
by Taichi Kato 26 Apr '23

26 Apr '23

CRTSJ105550.1+095621 superhump? Josch Hambsch reported observations for three hours. Variations compatible with superhumps were detected. Further observations are needed for confirmation.

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[vsnet-alert 27678] ATLAS23hxn recent data
by Taichi Kato 26 Apr '23

26 Apr '23

ATLAS23hxn recent data SU UMa or WZ Sge? YYYYMMDD(UT) mag observer 20230415.3771 15.802o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230415.3800 15.793o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230415.3877 15.788o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230415.4005 15.800o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.1048 16.123o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.1222 16.130o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.1251 16.116o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.1304 16.098o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.1649 16.113o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230418.3513 16.035c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230418.3541 16.042c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230418.3673 16.042c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230418.3729 16.020c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230420.1370 16.525o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230420.1499 16.599o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230420.1552 16.691o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230420.1630 16.606o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230424.3267 16.694c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230424.3299 16.722c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230424.3351 16.730c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27677] ASASSN-23da likely superoutburst
by Taichi Kato 26 Apr '23

26 Apr '23

ASASSN-23da likely superoutburst ATLAS apparently detected superhumps. YYYYMMDD(UT) mag observer 20230417.9655 14.998o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.9673 15.025o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230417.9703 14.993o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230418.0018 14.996o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230419.1933 15.261c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230419.1961 15.282c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230419.1989 15.266c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230419.2041 15.243c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230419.4206 15.302c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.3746 16.373c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.3773 16.426c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.3835 16.438c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.3946 16.417c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.4011 16.258c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.4043 16.267c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230425.4075 16.297c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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