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

[vsnet-alert 27518] 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.

1 0

[vsnet-alert 27517] 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.

1 0

[vsnet-alert 27516] MASTER OT J051529.15+560532.0 likely superoutburst
by Taichi Kato 17 Mar '23

17 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)

1 0

[vsnet-alert 27515] V375 UMa
by Taichi Kato 17 Mar '23

17 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.

1 0

[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)

1 0

[vsnet-alert 27513] TCP J06461075+2502415: most likely WZ Sge-type dwarf nova
by Taichi Kato 16 Mar '23

16 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.

1 0

[vsnet-alert 27512] TCP J06461075+2502415
by Naoto Kojiguchi 15 Mar '23

15 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)

1 0

[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)

1 0

[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))

1 0

[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

3 2

2025

2024

2023

2022

2021

vsnet-alert