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

[vsnet-alert 27503] NSV 3734 fading
by Taichi Kato 12 Mar '23

12 Mar '23

NSV 3734 fading http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bbb/ Gaia23bbb AT2023cwc 2023-03-08 02:13:34 116.73117 -9.57521 15.53 13.74 0.09 unknown 2023-03-10 17:42:05 ~1.5 mag dimming in known CV NSV 3734 ATLAS data also recorded slow fading starting from 2022 Nov. No past fading episode in ATLAS, and ASAS-3.

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[vsnet-alert 27502] Rybka2 possible superoutburst
by Taichi Kato 10 Mar '23

10 Mar '23

Rybka2 possible superoutburst UGSU:+E http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bao/ Gaia23bao AT2023cuw 2023-03-07 04:14:12 337.90592 40.49537 17.10 19.53 1.06 CV 2023-03-09 09:48:25 outburst in known CV Rybka 2 Last superoutburst in 2022 July and supercycle about 300 d (ATLAS data).

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[vsnet-alert 27501] Wils_SDSSJ074859.55+312512.6 superoutburst
by Taichi Kato 08 Mar '23

08 Mar '23

Wils_SDSSJ074859.55+312512.6 superoutburst UGSU+E YYYYMMDD(UT) mag observer 20230305.5949 <156c (Yutaka Maeda) 20230306.0679 15.595o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.0768 15.568o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.0799 15.633o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.0998 15.721o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3344 15.847o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3550 15.570o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.6215 <149c (Yutaka Maeda)

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[vsnet-alert 27500] MASTER OT J055845.55+391533.4: oscillation-type rebrightening
by Taichi Kato 08 Mar '23

08 Mar '23

MASTER OT J055845.55+391533.4: oscillation-type rebrightening Itoh-san, Kiyota-san and Vihorlat Observatory team have reported further observations. This object shows oscillation-type rebrightening after the dips. This feature was also present in the past ATLAS data. Strange object.

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[vsnet-alert 27499] Re: Wils_SDSSJ075107.50+300628.4: likely superoutburst
by Taichi Kato 08 Mar '23

08 Mar '23

Re: Wils_SDSSJ075107.50+300628.4: likely superoutburst > Almost superoutburst-only object with a short supercycle. > Superoutburst? in 2022 Oct. Indeed very likely for both. Very few normal outbursts were recorded in ATLAS despite the short supercycle. YYYYMMDD(UT) mag observer 20230302.5894 <156c (Yutaka Maeda) 20230304.5793 <151c (Yutaka Maeda) 20230305.5957 144c (Yutaka Maeda) 20230306.3344 15.172o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3550 15.124o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.6223 149:c (Yutaka Maeda)

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[vsnet-alert 27498] Re: Gaia23azk
by Taichi Kato 08 Mar '23

08 Mar '23

Re: Gaia23azk No past activity in ASAS-SN/ATLAS. https://asas-sn.osu.edu/sky-patrol/coordinate/9c515a17-75cd-480d-98e9-f5a7c…

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[vsnet-alert 27497] ASASSN-15cv bright outburst?
by Taichi Kato 08 Mar '23

08 Mar '23

ASASSN-15cv bright outburst? Short outburst in 2019. YYYYMMDD(UT) mag observer 20230303.978 <16.30C (Gary Poyner) 20230303.9795 <162cG (Masao Funada) 20230304.5094 <158c (Yutaka Maeda) 20230305.5258 <157c (Yutaka Maeda) 20230306.5525 148:cG (Yutaka Maeda)

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[vsnet-alert 27496] Wils_SDSSJ075107.50+300628.4: likely superoutburst
by Taichi Kato 08 Mar '23

08 Mar '23

Wils_SDSSJ075107.50+300628.4: likely superoutburst Almost superoutburst-only object with a short supercycle. Superoutburst? in 2022 Oct. YYYYMMDD(UT) mag observer 20230302.5894 <156c (Yutaka Maeda) 20230304.5793 <151c (Yutaka Maeda) 20230305.5957 144c (Yutaka Maeda) 20230306.6223 149:c (Yutaka Maeda)

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[vsnet-alert 27495] Re: Gaia23azk
by Taichi Kato 08 Mar '23

08 Mar '23

Re: Gaia23azk > Bright transient. What is it? Reddened nova? Emission line in the spectrum? YYYYMMDD(UT) mag observer 20230306.6405 15.094o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.6446 15.081o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.6519 15.044o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.6626 15.040o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230307.3733 14.790o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230307.3751 14.869o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230307.3917 14.823o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27494] Gaia23azk
by Taichi Kato 07 Mar '23

07 Mar '23

Gaia23azk Bright transient. What is it? http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23azk/ Gaia23azk AT2023ctx 2023-03-05 12:55:35 286.80714 9.48159 13.85 unknown 2023-03-07 12:49:08 Apparently hostless red transient

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