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

[vsnet-alert 27332] ASASSN-16ga (relatively) rare bright outburst
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-16ga (relatively) rare bright outburst (Not seen in outburst by Gaia before) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23ahk/ Gaia23ahk AT2023ul 2023-01-15 18:44:42 232.03771 -38.26650 13.68 18.84 0.25 unknown 2023-01-17 09:25:45 Outburst in candidate CV ASASSN-16ga 152809.048 -381559.31 (2000.0) Gaia_DR2_6006561756877579776 plx=1.694(0.349) dismod=8.9 pmra=2.357(0.747) pmdec=-6.297(0.642) G=18.639 BP=18.825 RP=18.148 152809.048 -381559.31 (2000.0) Gaia_EDR3_6006561756877579776 plx=1.562(0.258) dismod=9.0 pmra=1.305(0.275) pmdec=-4.901(0.218) G=18.673 BP=18.911 RP=18.219

1 0

[vsnet-alert 27331] 6dFg0752425-545120 outburst
by Taichi Kato 19 Jan '23

19 Jan '23

6dFg0752425-545120 outburst (SS Cyg star) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23ahs/ Gaia23ahs AT2022aehs 2022-12-16 08:21:30 118.17692 -54.85522 13.33 16.10 1.27 CV 2023-01-18 09:26:18 outburst in known CV 6dFGS g0752425-545120

1 0

[vsnet-alert 27330] ASASSN-23ag
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-23ag ASASSN-23ag --- ------- 7:43:10.54 13:6:17.7 2023-01-15.33 13.58 SDSS DSS VIZIER ------- CV candidate, matches to SDSS g=21.4, g>17.6 on 2023-01-12.25, g=13.9 on 2023-01-15.33, g=14.1 on 2023-01-16.16. ASASSN-23ag 20230112.25 <176g ASN ASASSN-23ag 20230115.23 139g ASN ASASSN-23ag 20230116.16 141g ASN 074310.574 +130618.62 (2000.0) GALEX_DR5_6378058280730625858 NUV=21.324(0.240) FUV=20.883(0.190) Itoh-san already reported observations, which did not show strong humps.

1 0

[vsnet-alert 27329] ASASSN-23af
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-23af ASASSN-23af --- ------- 5:36:16.38 -31:51:8.1 2023-01-13.31 13.26 SDSS DSS VIZIER ------- CV candidate, matches to DES g=20.3, g>17.1 on 2023-01-12.29, g=13.8 on 2023-01-13.18, g=13.6 on 2023-01-13.31, g=13.3 on 2023-01-14.20 ASASSN-23af 20230112.29 <171g ASN ASASSN-23af 20230113.18 138g ASN ASASSN-23af 20230114.20 133g ASN 053616.421 -315107.83 (2000.0) Gaia_DR2_2902110913736006144 plx=2.176(0.466) dismod=8.3 pmra=1.189(0.783) pmdec=-9.462(0.801) G=20.240 BP=20.196 RP=19.996 053616.421 -315107.84 (2000.0) Gaia_EDR3_2902110913736006144 plx=2.198(0.358) dismod=8.3 pmra=1.828(0.447) pmdec=-10.463(0.430) G=20.183 BP=20.264 RP=19.974

1 0

[vsnet-alert 27328] MASTER OT J064725.70+491543.9 superoutburst
by Taichi Kato 18 Jan '23

18 Jan '23

MASTER OT J064725.70+491543.9 superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20230107.3305 17.979zr (ZTF Alert DC mag (Masci+ 2019)) 20230107.7833 <146c (Yutaka Maeda) 20230108.6708 <165C (Masayuki Moriyama) 20230108.7384 <150c (Yutaka Maeda) 20230109.7793 <151c (Yutaka Maeda) 20230110.7574 146:cG (Yutaka Maeda) 20230116.622 137C (Mitsutaka Hiraga)

1 0

[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