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

[vsnet-alert 27327] TCP J06442271+1549388: new WZ Sge-type dwarf nova
by Taichi Kato 18 Jan '23

18 Jan '23

TCP J06442271+1549388: new WZ Sge-type dwarf nova Itoh-san and Kiyota-san have reported observations. The data show clear double-wave humps (amplitude 0.05 mag). The period was 0.0529(5) d (single-night baseline). Although The profile was somewhat different from those of typical WZ Sge-type early superhumps, the large outburst amplitude supports this classification.

1 0

[vsnet-alert 27326] ASASSN-18gc outburst
by Taichi Kato 17 Jan '23

17 Jan '23

ASASSN-18gc outburst Bright outburst. SS Cyg star? YYYYMMDD(UT) mag observer 20230115.1704 15.57C (Masao Funada)

1 0

[vsnet-alert 27325] TCP J06442271+1549388
by Taichi Kato 17 Jan '23

17 Jan '23

Re: Spectrum of TCP J06442271+1549388 As judged from broad absorption features of H beta and higher lines, H alpha appears to be filled by emission and only the emission core is visible. I also see He II and Bowen.

1 0

[vsnet-alert 27324] TCP J06442271+1549388 location
by Taichi Kato 17 Jan '23

17 Jan '23

TCP J06442271+1549388 location Katsumi Yoshimoto has reported astrometry of this object to be 06h44m22s.67 +15 49' 35".5, in very good agreement with the Pan-STARRS1 location.

1 0

[vsnet-alert 27323] ASASSN-22oh superhumps
by Taichi Kato 17 Jan '23

17 Jan '23

ASASSN-22oh superhumps Josch Hambsch's observations show that this object started showing ordinary superhumps on Jan. 14 (some hint on Jan. 13). The period (stage A) is 0.05539(8) d and the amplitude is relatively large (0.2 mag). Probably not an extreme WZ Sge star.

1 0

[vsnet-alert 27322] Spectrum of TCP J06442271+1549388
by Kenta TAGUCHI 16 Jan '23

16 Jan '23

Spectrum of TCP J06442271+1549388 We reported optical spectrum of TCP J06442271+1549388 to TNS and classify it as a CV: https://www.wis-tns.org/object/2023nf # Note: We may not be able to have resolved the H alpha line, considering the observed FWHM (~ 14 A) and the instrumental spectral resolution (~ 500). -- ________________________________________________________________ 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 27321] Optical Flare of Quasar Ton 599 (4C +29.45)
by Stefan Karge 16 Jan '23

16 Jan '23

Quasar Ton 599 = 4C +29.45 (4FGL J1159.5+2914; z=0.72449) optical Flare. object date (UTC) mag comment -------------------------------------------------- 4C +29.45 20230116.290 13.53V active (OU COAST, Tenerife) Optical activity is accompanied by enhanced gamma-ray and x-ray flux. See Atel #15859. Stefan Karge (SKA) http://quasar.square7.ch/fqm/1156+295.html

1 0

[vsnet-alert 27320] X Ser in outburst
by Robert J. Modic 16 Jan '23

16 Jan '23

CCD Observations Object YYYYMMDD(UT) Mag Obs Chart Remarks SERX 20230115.503 16.35V MRV Henden MPO61; Err 0.06; Outburst Instruments: RCOS 24" w/FLI PL1603, AAVSONet (MPO61) Observer: Robert J. Modic (MRV)

1 0

[vsnet-alert 27319] NSV 4838 superoutburst
by Taichi Kato 16 Jan '23

16 Jan '23

NSV 4838 superoutburst (Time-resolved photometry not particularly requested) YYYYMMDD(UT) mag observer 20230107.867 <168C (Mitsutaka Hiraga) 20230107.9056 <148C (Masayuki Moriyama) 20230109.7233 <142c (Yutaka Maeda) 20230110.7021 146c (Yutaka Maeda) 20230110.7021 146c (Yutaka Maeda) 20230114.883 150C (Jeremy Shears) 20230115.010 15.02C (Gary Poyner)

1 0

[vsnet-alert 27318] Very bright outburst of DQ Mus
by Taichi Kato 16 Jan '23

16 Jan '23

Very bright outburst of DQ Mus Well outside the formal range of variation. Could be a superoutburst (although I already assigned UGSS based on the past data). Time-resolved photometry is requested. YYYYMMDD(UT) mag observer 20230108.3259 17.711o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.3286 17.755o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.3336 17.921o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.3503 17.581o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0848 16.093o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0890 16.061o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0966 16.038o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.1047 16.066o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.2979 15.333o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.2984 15.451o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.3033 15.460o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.3179 15.169o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.3220 15.488o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.3323 15.124o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.3394 15.490o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.3467 15.169o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.553 145 (Rod Stubbings) 20230114.555 144 (Rod Stubbings) \

1 0

2025

2024

2023

2022

2021

vsnet-alert