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

[vsnet-alert 27756] Spectrum of TCP J17583414-2652300
by Kenta TAGUCHI 17 May '23

17 May '23

Spectrum of TCP J17583414-2652300 We reported optical spectrum of TCP J17583414-2652300 to ATel #16038 and classify it as a reddened nova: https://www.astronomerstelegram.org/?read=16038 Best, Kenta -- ________________________________________________________________ 田口健太　(TAGUCHI, Kenta) 京都大学大学院理学研究科宇宙物理学教室 (Department of Astronomy, Graduate School of Science, Kyoto University) kentagch(a)kusastro.kyoto-u.ac.jp 09090536980

1 0

[vsnet-alert 27755] Re: V548 Pav bright outburst
by Taichi Kato 17 May '23

17 May '23

Re: V548 Pav bright outburst YYYYMMDD(UT) mag observer 20230514.3410 <18.250g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.3204 14.083g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.599 142 (Rod Stubbings) 20230516.3314 14.067g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) Berto, the location is 211212.998 -663804.18 (2000.0) Gaia_DR2_6400875939749808256 plx=1.501(0.239) dismod=9.1 pmra=-3.542(0.282) pmdec=8.801(0.524) G=18.798 BP=19.090 RP=18.161 211212.998 -663804.17 (2000.0) Gaia_EDR3_6400875939749808256 plx=1.071(0.094) dismod=9.9 pmra=-2.708(0.100) pmdec=8.431(0.124) G=18.650 BP=18.891 RP=18.024 211213.038 -663803.63 (2000.0) GALEX_DR5_6383898878981180820 NUV=19.421(0.071) FUV=19.595(0.115)

1 0

[vsnet-alert 27754] ZTF19actaznc outburst: dip or rebrightening
by Taichi Kato 16 May '23

16 May '23

ZTF19actaznc outburst: dip or rebrightening (Gaia detection) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bud/ Gaia23bud AT2023imp 2023-05-01 16:13:38 321.84744 37.76632 18.22 20.15 0.65 unknown 2023-05-15 09:50:11 Outburst in candidate CV ZTF19actaznc YYYYMMDD(UT) mag observer 20230411.4472 16.997zr (ZTF Alert DC mag (Masci+ 2019)) 20230411.4710 16.967zg (ZTF Alert DC mag (Masci+ 2019)) 20230416.4556 17.248zr (ZTF Alert DC mag (Masci+ 2019)) 20230416.4860 17.285zg (ZTF Alert DC mag (Masci+ 2019)) 20230418.5994 17.349c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.6137 17.197c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.6215 17.213c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6048 17.284c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6109 17.356c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6150 17.396c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.6263 17.360c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.5854 17.451c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.5886 17.405c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.5918 17.379c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.6038 17.271c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5593 17.627c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5625 17.607c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5680 17.599c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5703 17.544c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5735 17.582c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5763 17.624c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5772 17.620c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.5823 17.644c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.4326 18.138zr (ZTF Alert DC mag (Masci+ 2019)) 20230501.4681 18.372zg (ZTF Alert DC mag (Masci+ 2019)) 20230502.6122 18.801o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.6194 18.768o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.6236 18.759o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.5890 18.863o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.5964 18.842o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5655 18.673o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5691 18.298o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5792 18.580o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.5856 18.630o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.4347 18.401zg (ZTF Alert DC mag (Masci+ 2019)) 20230513.5545 18.102o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.5572 18.009o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.5599 17.931o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.5818 18.046o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.5960 18.259o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.6118 18.121o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.6160 18.121o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

1 0

[vsnet-alert 27753] V548 Pav bright outburst
by Taichi Kato 16 May '23

16 May '23

V548 Pav bright outburst The 2022 Oct.-Nov. outburst with similar brightness was a long outburst. Possible SU UMa? YYYYMMDD(UT) mag observer 20230514.3410 <18.250g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.3204 14.083g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.599 142 (Rod Stubbings)

1 0

[vsnet-alert 27752] ASASSN-22ak period
by Taichi Kato 15 May '23

15 May '23

ASASSN-22ak period Josch Hambsch has reported additional data with a higher cadence. Although the period is not directly apparent to the eyes, a period analysis using all the data appears to give a consistent period of 0.04128(4) d (amplitude 0.06 mag, slower rise and steeper fade). This period is the same as reported in 2022 Dec. (vsnet-alert 27243). The double period appears to be excluded by the rapid fading in 2022. The small amplitude may have been due to observations more than 10 d after the peak. I suspect that this object is an EI Psc star from this period. The outburst behavior is very unusual.

1 0

[vsnet-alert 27751] 1RXSJ075330.1+044606: very active
by Taichi Kato 15 May '23

15 May '23

1RXSJ075330.1+044606: very active Very active transition between high and low states (VY Scl) since 2022 Sep. Currently in low state. YYYYMMDD(UT) mag observer 20230406.8840 16.375o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.8875 16.366o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.8928 16.591o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.9074 16.475o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230408.0940 16.199o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230408.1118 16.512o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230408.1220 16.336o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230408.1298 16.536o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230409.2909 14.864zg (ZTF Alert DC mag (Masci+ 2019)) 20230409.5473 167C (Masayuki Moriyama) 20230409.7961 16.555o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230409.7990 16.560o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230409.8053 16.359o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230409.8161 16.352o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230410.3228 16.356g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230411.0440 16.464c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.0472 16.553c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.0532 16.432c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.0568 16.431c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.0697 16.493c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.1112 16.374g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230411.1572 16.389zg (ZTF Alert DC mag (Masci+ 2019)) 20230411.2374 16.241zr (ZTF Alert DC mag (Masci+ 2019)) 20230412.5505 165C (Masayuki Moriyama) 20230414.0415 16.666c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.0447 16.485c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.0516 16.421c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.0630 16.533c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230415.1925 17.210zr (ZTF Alert DC mag (Masci+ 2019)) 20230415.2895 17.401g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.7919 17.511o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230415.7947 17.433o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230415.8016 17.445o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230415.8194 17.488o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.0263 17.963c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.0295 17.995c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.0390 18.477c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.0542 18.093c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.1720 17.631zr (ZTF Alert DC mag (Masci+ 2019)) 20230417.1937 17.155zg (ZTF Alert DC mag (Masci+ 2019)) 20230419.2117 17.571zr (ZTF Alert DC mag (Masci+ 2019)) 20230420.0376 18.155c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230420.0407 18.390c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230420.0462 18.202c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230420.0562 18.382c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230421.1761 18.378zg (ZTF Alert DC mag (Masci+ 2019)) 20230423.0030 18.721c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.0062 18.750c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.0161 18.863c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.0216 18.530c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.1829 18.654zr (ZTF Alert DC mag (Masci+ 2019)) 20230423.2018 17.240zg (ZTF Alert DC mag (Masci+ 2019)) 20230424.0321 <17.290g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230424.7202 18.905o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.7398 19.111o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.0558 <17.356g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230426.5593 <161C (Masayuki Moriyama) 20230430.7197 18.008o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230430.7230 18.328o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.1750 17.378zg (ZTF Alert DC mag (Masci+ 2019)) 20230502.0310 18.391o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.0342 18.192o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.0145 <16.947g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.0520 <16.762g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.9889 <16.904g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230505.0275 18.028o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.9636 18.504o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.9774 18.834o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.9900 18.529o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.7247 18.648o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.7278 18.396o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.7420 18.180o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.7495 18.639o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230510.7612 <17.304g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230511.4895 <161C (Masayuki Moriyama) 20230512.0230 <17.417g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230513.0160 <17.322g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0

[vsnet-alert 27750] V1000 Aql: IW And-type standstill and dip
by Taichi Kato 15 May '23

15 May '23

V1000 Aql: IW And-type standstill and dip Not unprecedented. Long standstill in this object is relatively rare. YYYYMMDD(UT) mag observer 20230403.0968 16.028g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230406.0970 16.045g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230408.4632 16.501zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.3224 16.209g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230410.4215 16.768zr (ZTF Alert DC mag (Masci+ 2019)) 20230413.3067 15.943g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.5170 15.934g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.8282 <168C (Masayuki Moriyama) 20230417.4558 16.798zr (ZTF Alert DC mag (Masci+ 2019)) 20230417.4818 16.542zg (ZTF Alert DC mag (Masci+ 2019)) 20230419.0709 15.854g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230420.3968 15.674g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230420.4609 16.450zr (ZTF Alert DC mag (Masci+ 2019)) 20230422.3994 15.233g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230422.4586 15.602zg (ZTF Alert DC mag (Masci+ 2019)) 20230424.4166 15.305g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230425.4531 15.952zr (ZTF Alert DC mag (Masci+ 2019)) 20230425.4739 15.827zg (ZTF Alert DC mag (Masci+ 2019)) 20230427.4220 16.959zg (ZTF Alert DC mag (Masci+ 2019)) 20230427.4726 17.869zr (ZTF Alert DC mag (Masci+ 2019)) 20230429.0579 <17.242g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230429.4487 19.249zg (ZTF Alert DC mag (Masci+ 2019)) 20230504.0210 <14.822g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.0210 <14.919g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.0210 <15.386g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230505.2419 15.488g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230507.2461 16.184g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.4626 16.111g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230513.7012 <161C (Masayuki Moriyama)

1 0

[vsnet-alert 27749] NY Her superoutburst
by Taichi Kato 15 May '23

15 May '23

NY Her superoutburst (ER UMa-like object) YYYYMMDD(UT) mag observer 20230503.4169 18.477zr (ZTF Alert DC mag (Masci+ 2019)) 20230504.3777 <16.992g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230508.3743 15.822g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.3606 15.975g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.6196 159:c (Yutaka Maeda) 20230510.5690 16.056g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.6718 163:C (Masayuki Moriyama) 20230511.0804 15.284g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230511.4629 15.963zg (ZTF Alert DC mag (Masci+ 2019)) 20230511.6454 <151c (Yutaka Maeda) 20230513.6119 <156C (Masayuki Moriyama) 20230514.5432 16.323g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0

[vsnet-alert 27748] ASASSN-17fo possible superoutburst
by Taichi Kato 15 May '23

15 May '23

ASASSN-17fo possible superoutburst (UGSU+E) YYYYMMDD(UT) mag observer 20230510.3665 <17.776g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.5396 <142c (Yutaka Maeda) 20230511.5475 <159c (Yutaka Maeda) 20230511.6453 <172C (Masayuki Moriyama) 20230513.5734 16.76C (Masayuki Moriyama) 20230514.3727 16.909g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0

[vsnet-alert 27747] ASASSN-14cf likely superoutburst
by Taichi Kato 15 May '23

15 May '23

ASASSN-14cf likely superoutburst Past ASAS-SN data suggests a supercycle of 250 d, but superoutbursts not always occurred at expected epochs. The current one looks like a super. YYYYMMDD(UT) mag observer 20230508.3274 <17.495g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.3043 <17.165g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.3375 <17.188g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230513.3741 15.161o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.3768 15.198o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230513.3972 15.179o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.635 149 (Rod Stubbings)

1 0

2024

2023

2022

2021

vsnet-alert May 2023