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

[vsnet-newvar 9881] ASASSN-23bn superhumps
by Taichi Kato 18 Mar '23

18 Mar '23

ASASSN-23bn superhumps Peter Starr's observations on Mar. 16 showed a 0.2-mag superhump.

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[vsnet-newvar 9880] ATOJ302.3933+55.0904 = VSSPJ200934.41+550525.8: currently dwarf nova
by Taichi Kato 17 Mar '23

17 Mar '23

ATOJ302.3933+55.0904 = VSSPJ200934.41+550525.8: currently dwarf nova Dwarf nova outbursts since 2020 Aug. (ATLAS data). Z Cam star.

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[vsnet-newvar 9879] Re: TCP J06461075+2502415: most likely WZ Sge-type dwarf nova
by Taichi Kato 17 Mar '23

17 Mar '23

Re: TCP J06461075+2502415: most likely WZ Sge-type dwarf nova Using all the available data, the presence of early superhumps has become inconclusive. Let's wait to see ordinary superhumps to appear. Observers: Itoh-san, Kyoto U. team, Kiyota-san, Tonny Vanmunster, Sano-san, Tamas Tordai and Magnus Larsson.

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[vsnet-newvar 9878] ASASSN-23bn: new SU UMa-type dwarf nova
by Taichi Kato 17 Mar '23

17 Mar '23

ASASSN-23bn: new SU UMa-type dwarf nova According to observations by Peter Starr on Mar. 15, this object showed clear ordinary superhumps (amplitude 0.07 mag). Although the data by Josch Hambsch (Mar. 11-14) were suggestive of superhumps, the reality was not confirmed due to the sparse sampling. High time-resolution data by Berto Monard on Mar. 12 did not show evidence. There may have been variations (possible early superhumps?) on Mar. 10, but were not conclusive.

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[vsnet-newvar 9877] Gaia DR3 5648566130992828800 = Gaia23bcj: UGSS+ELL, in outburst but fading
by Taichi Kato 17 Mar '23

17 Mar '23

Gaia DR3 5648566130992828800 = Gaia23bcj: UGSS+ELL, in outburst but fading Gaia23bcj 2023-03-10 13:51:47 136.71472 -26.41193 15.62 18.33 0.09 unknown 2023-03-17 00:01:57 ~3 mag brightening in Gaia / WISE source, gets bluer Porb = 0.423739(2) d (ATLAS data). Ellipsoidal variations with an amplitude of 0.3 mag.

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[vsnet-newvar 9876] MASTER OT J051529.15+560532.0 likely superoutburst
by Taichi Kato 16 Mar '23

16 Mar '23

MASTER OT J051529.15+560532.0 likely superoutburst Known SU UMa star. Moderately observed in 2020. YYYYMMDD(UT) mag observer 20230310.5155 <156c (Yutaka Maeda) 20230313.500 <178C (Mitsutaka Hiraga) 20230313.5395 <159c (Yutaka Maeda) 20230314.5100 <164c (Yutaka Maeda) 20230314.6089 170C (Masayuki Moriyama) 20230315.5258 <159c (Yutaka Maeda) 20230316.5502 132c (Yutaka Maeda) 20230316.5502 132c (Yutaka Maeda)

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[vsnet-newvar 9875] TCP J06461075+2502415: most likely WZ Sge-type dwarf nova
by Taichi Kato 15 Mar '23

15 Mar '23

TCP J06461075+2502415: most likely WZ Sge-type dwarf nova Kiyota-san and Itoh-san have reported observations (also some data from Magnus Larsson). The observations show likely early superhumps with a period of 0.053(1) d and an amplitude of 0.05 mag. The period was based on a few cycles and will be updated as more data become available.

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[vsnet-newvar 9874] TCP J06461075+2502415
by Naoto Kojiguchi 14 Mar '23

14 Mar '23

TCP J06461075+2502415 Large outburst amplitude of more than 8 mag. TCP J06461075+2502415 2023 03 14.5871* 06 46 10.75 +25 02 41.5 14.1 U Gem 9 8 2023 03 14.5871 Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on two frames (30-s exp. limiting mag 16.0) taken by 0.10-m F3.0 refractor and CMOS camera. Nothing is visible at this location on the frames taken on 2023 Mar. 06.5853 UT (30-s exp. limiting mag 15.5) by same instrument. --- Seiichiro Naito and Isao Endoh (NAOJ) ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/6159bb35-97b5-454d-a2d8-90e41… TCPJ06461075+2502415 20230310.298 <15.696g ASN TCPJ06461075+2502415 20230310.299 <15.854g ASN TCPJ06461075+2502415 20230310.301 <16.011g ASN TCPJ06461075+2502415 20230311.057 <16.441g ASN TCPJ06461075+2502415 20230311.059 <16.594g ASN TCPJ06461075+2502415 20230311.060 <16.409g ASN TCPJ06461075+2502415 20230311.088 <16.197g ASN TCPJ06461075+2502415 20230311.089 <16.229g ASN TCPJ06461075+2502415 20230311.090 <16.221g ASN TCPJ06461075+2502415 20230312.114 <15.945g ASN TCPJ06461075+2502415 20230312.115 <16.031g ASN TCPJ06461075+2502415 20230312.116 <15.970g ASN TCPJ06461075+2502415 20230314.041 197:o ATF TCPJ06461075+2502415 20230314.044 197:o ATF TCPJ06461075+2502415 20230314.5871 14.1C (Yuji Nakamura)

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[vsnet-newvar 9873] Re: ASASSN-23bn
by Taichi Kato 12 Mar '23

12 Mar '23

Re: ASASSN-23bn ATLAS detection. YYYYMMDD(UT) mag observer 20230309.0735 14.057o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.0771 14.040o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.0820 14.051o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.0920 14.051o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.8416 14.489o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.8452 14.455o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.8521 14.507o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-newvar 9872] Re: Gaia23bbc
by Taichi Kato 12 Mar '23

12 Mar '23

Re: Gaia23bbc After combination with ATLAS data. Likely SS Cyg star. YYYYMMDD(UT) mag observer 20230220.1833 19.156c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.1865 18.868c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.2215 18.788c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.2295 18.984c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230221.0989 <17.715g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230221.1002 <17.479g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230221.1015 <17.413g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230222.2501 <17.443g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230222.2513 <17.433g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230222.2526 <17.577g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230222.9138 18.183o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230222.9170 18.029o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230222.9224 18.091o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230222.9340 18.076o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230223.1804 <17.622g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230223.1817 <17.494g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230223.1830 <17.609g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230224.0663 19.092c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230224.0686 19.137c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230224.0714 18.761c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230224.0852 18.951c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230224.1146 <17.609g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230224.1159 <17.554g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230224.1172 <17.523g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230224.1500 <17.590g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230224.1512 <17.569g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230224.1525 <17.501g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230225.1787 <17.510g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230225.1800 <17.611g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230225.1812 <17.403g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230225.1974 <17.535g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230225.1987 <17.452g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230225.2000 <17.432g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230226.1785 <17.461g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230226.1797 <17.673g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230226.1810 <17.452g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230228.0328 <16.891g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230228.0341 <16.856g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230228.0354 <17.004g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230228.1061 18.025o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230228.1093 18.003o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230228.1165 18.352o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230228.1516 18.113o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230301.1279 <17.064g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230301.1292 <17.204g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230301.1305 <16.952g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230301.1543 <17.164g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230301.1555 <17.062g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230301.1568 <17.018g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230302.1545 <16.805g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230302.1558 <16.939g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230302.1570 <16.833g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230302.8822 18.237o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230302.8937 18.137o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230302.8973 18.134o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230302.9027 17.919o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230303.2580 <16.473g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230303.2592 <16.661g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230303.2605 <16.724g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230304.1407 18.071o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230304.1434 18.245o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230304.1489 18.132o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230304.1642 17.919o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230304.2008 <16.336g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230304.2021 <16.349g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230304.2034 <16.233g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230307.1484 <15.756g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230307.1496 <15.778g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230307.1509 <15.783g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230307.2582 <15.609g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230307.2594 <15.736g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230308.0945 15.571o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.1191 15.611o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.1222 15.602o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.1281 15.596o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.9867 15.336g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230308.9879 15.367g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230308.9892 15.496g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230309.9629 15.064o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.9661 15.054o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.9760 15.090o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.9883 15.066o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9342 14.729o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9374 14.685o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9434 14.629o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.2782 14.554g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230311.2794 14.516g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230311.2807 14.566g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230311.7886 14.389g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230311.7899 14.390g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230311.7911 14.384g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))

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