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

[vsnet-alert 27515] V375 UMa
by Taichi Kato 16 Mar '23

16 Mar '23

V375 UMa Kiyota-san and Itoh-san reported observations. There were only low-amplitude variations on Mar. 15 and 16. Superhumps may have not yet developed.

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[vsnet-alert 27514] V375 UMa likely superoutburst
by Taichi Kato 16 Mar '23

16 Mar '23

V375 UMa likely superoutburst YYYYMMDD(UT) mag observer 20230310.697 <172C (Mitsutaka Hiraga) 20230313.7092 <159c (Yutaka Maeda) 20230314.6363 151:cG (Yutaka Maeda) 20230314.6363 151:cG (Yutaka Maeda) 20230314.972 14.34C (Gary Poyner) 20230315.242 14.13C (Gary Poyner)

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[vsnet-alert 27513] 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-alert 27512] 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-alert 27511] RX Vol likely superoutburst after precursor
by Taichi Kato 14 Mar '23

14 Mar '23

RX Vol likely superoutburst after precursor YYYYMMDD(UT) mag observer 20230227.9052 18.094o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230227.9089 18.161o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230227.9367 18.069o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230227.9426 18.043o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230301.1595 18.183o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230301.2128 18.183o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230301.2220 18.064o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230301.2253 18.368o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230303.9825 15.604o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230303.9857 15.616o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230303.9920 15.605o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230304.0026 15.623o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230304.683 156 (Rod Stubbings) 20230305.1586 16.693o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.1618 16.694o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.1682 16.791o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.1785 16.742o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1105 17.662o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1147 17.717o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1197 17.684o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1515 17.954o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8684 15.618o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8786 15.592o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8818 15.589o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8850 15.588o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8891 15.507o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8895 15.493o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.8945 15.489o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9072 15.520o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.1754 15.264o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.1785 15.205o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.1844 15.175o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.478 149 (Rod Stubbings)

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[vsnet-alert 27510] V392 Hya: likely outbursts from standstill
by Taichi Kato 13 Mar '23

13 Mar '23

V392 Hya: likely outbursts from standstill YYYYMMDD(UT) mag observer 20230219.492 148 (Rod Stubbings) 20230223.490 149 (Rod Stubbings) 20230224.506 149 (Rod Stubbings) 20230225.7107 15.33C (Masayuki Moriyama) 20230227.6051 15.20C (Masayuki Moriyama) 20230304.731 148 (Rod Stubbings) 20230310.426 140 (Rod Stubbings) 20230311.2057 14.55cG (Masao Funada) 20230312.428 146 (Rod Stubbings) YYYYMMDD(UT) mag observer 20221020.0897 15.101o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221020.0941 15.091o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221020.1134 15.061o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221020.1185 15.103o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221023.0832 15.000o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221023.0860 14.941o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221023.0910 14.976o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221023.1029 14.988o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221030.3407 15.069c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221030.3461 15.011c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221030.3649 15.081c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221030.3694 15.072c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221102.3378 14.837c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221102.3433 14.841c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221102.3474 14.833c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221102.3621 14.793c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221107.3516 14.234o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221107.3544 14.218o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221107.3571 14.243o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221107.3608 14.208o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221108.0682 14.248o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221108.0710 14.268o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221108.0760 14.248o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221108.0860 14.262o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221108.0997 14.263o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27505] Gaia23bbc
by Taichi Kato 12 Mar '23

12 Mar '23

Gaia23bbc Possible dwarf nova. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bbc/ Gaia23bbc AT2023cwd 2023-03-08 02:02:00 125.15272 -18.52729 15.51 18.23 0.18 unknown 2023-03-10 17:42:18 ~3 mag outburst in red Gaia source with faint GALEX detection

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[vsnet-alert 27508] 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-alert 27507] 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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[vsnet-alert 27504] ASASSN-23bn
by Taichi Kato 12 Mar '23

12 Mar '23

ASASSN-23bn Bright, large-amplitude transient. ASASSN-23bn --- ------- 7:31:22.43 -45:54:47.6 2023-03-8.88 13.45 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>17.2 on 2023-03-07.14, g=14.1 on 2023-03-08.25, g=13.8 on 2023-03-08.89.

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vsnet-alert March 2023