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

[vsnet-alert 26932] ASASSN-22lk: bright transient
by Taichi Kato 20 Sep '22

20 Sep '22

ASASSN-22lk: bright transient ASASSN-22lk -- ------- 18:54:33.41 11:56:6.1 2022-09-18.19 11.63 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.5, g>17.7 on 2022-09-17.22, g=12.1 on 2022-09-18.18 185433.474 +115606.25 (2000.0) Gaia_DR2_4504346470647563008 plx=5.407(0.857) dismod=6.3 pmra=-2.475(1.526) pmdec=-18.109(2.153) G=20.298 BP=20.304 RP=19.989 185433.474 +115606.25 (2000.0) Gaia_EDR3_4504346470647563008 plx=3.328(0.642) dismod=7.4 pmra=-1.831(0.593) pmdec=-13.594(0.604) G=20.258 BP=20.417 RP=20.390

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[vsnet-alert 26930] ZTF22abfjnpj: new SU UMa-type dwarf nova
by Yusuke Tampo 16 Sep '22

16 Sep '22

ZTF22abfjnpj: new SU UMa-type dwarf nova Kyoto Univ. team and Moriyama-san reported the observations of ZTF22abfjnpj = AT 2022tru. This object was discovered by ZTF on 7th Sep. with the outburst amplitude of 8 mag, and spectroscopically classified as a CV by Dr. Claudio Balcon. https://www.wis-tns.org/object/2022tru Our observation at Kyoto Univ. on 15th Sep. detected a 0.2-mag superhump with a period of ~0.056 d. Therefore, ZTF22abfjnpj is likely a SU UMa-type dwarf nova, and also can be a WZ Sge-type dwarf nova based on its large outburst amplitude and short superhump period. Time-resolved observations are encouraged to determine its superhump periods. Best, Yusuke -- ---------------------------------------------- 京都大学大学院理学研究科宇宙物理学教室 D2 Kyoto University, Graduate School of Department of Astronomy, PhD student 反保雄介 Yusuke TAMPO MAIL: tampo(a)kusastro.kyoto-u.ac.jp ----------------------------------------------

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[vsnet-alert 26929] ASASSN-22lf
by Taichi Kato 16 Sep '22

16 Sep '22

ASASSN-22lf ASASSN-22lf --- ------- 20:37:31.05 14:23:39.2 2022-09-14.38 15.34 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>17.1 on 2022-09-11.05, g=16.9 on 2022-09-12.80, g=15.7 on 2022-09-14.37, g=14.2 on 2022-09-15.13 Precursor and main outburst? Reaching mag 13. The initial outburst was too short for an ordinary dwarf nova, but might be possible for an ultrashort period binary. Amplitude too large for IP outbursts. https://asas-sn.osu.edu/sky-patrol/coordinate/8ac611f2-d397-4749-985e-5a9a9…

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[vsnet-alert 26928] Re: MASTER OT J001204.00-412337.4: fourth rebeightening
by Taichi Kato 14 Sep '22

14 Sep '22

Re: MASTER OT J001204.00-412337.4: fourth rebeightening According to observations by Josch Hambsch, the object is becoming brighter between rebeightenings. It may enter a standstill-like phase as frequently seen in AM CVn-type outbursts, but not common in hydrogen-rich system.

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[vsnet-alert 26927] MASTER OT J001204.00-412337.4: fourth rebeightening
by Taichi Kato 13 Sep '22

13 Sep '22

MASTER OT J001204.00-412337.4: fourth rebeightening Josch Hambsch detected the fourth rebeightening on Sep. 12-13. The rising part was detected on Sep. 12.

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[vsnet-alert 26926] Gaia DR3 6708677485442815744 = ASASSN-22ku: superhump period
by Taichi Kato 09 Sep '22

09 Sep '22

Gaia DR3 6708677485442815744 = ASASSN-22ku: superhump period Berto Monard and Josch Hambsch reported observations. The period of stage B superhumps (since Sep. 5) is 0.07412(3) d. The period given in vsnet-alert 26925 was not correct.

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[vsnet-alert 26925] Gaia DR3 6708677485442815744 = ASASSN-22ku: new SU UMa-type dwarf nova
by Taichi Kato 06 Sep '22

06 Sep '22

Gaia DR3 6708677485442815744 = ASASSN-22ku: new SU UMa-type dwarf nova Berto Monard and Josch Hambsch reported observations. The object started to show superhumps on Sep. 3. The current period (likely stage A or A/B mixed, amplitude already 0.12 mag) is 0.07042(5) d. Superhumps were not evident on Sep. 2.

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[vsnet-alert 26924] TCP J06015731+3903527 = AT 2022tqu = DASCH J060157.3+390353
by Naoto Kojiguchi 06 Sep '22

06 Sep '22

TCP J06015731+3903527 = AT 2022tqu = DASCH J060157.3+390353 Large outburst amplitude of 9 mag. Outburst (13.9 mag) on 1943 Oct. 31 in DASCH data. Possible WZ Sge-type dwarf nova. TCP J06015731+3903527 2022 09 06.4175* 06 01 57.31 +39 03 52.7 12.7 C Aur 0 0 http://www.cbat.eps.harvard.edu/unconf/followups/J06015731+3903527.html 2022 09 06.4175 Discovered by B.Kumar (Golden Ears Observatory Transient Survey - GEOTS) at Golden Ears Observatory, Maple Ridge, BC, Canada, in three 30-second unfiltered exposures using a 0.36-m f/2 Schmidt-Cassegrain + CCD, with magnitude 12.7 under limiting magnitude 18.0. Nothing is visible at this position on archival images taken on 2022 September 02.4418 UT (limiting mag 18.0). IDs: 060157.310 +390352.708 PS1_DR1_154870904887418214 g=21.5306(0.0496) r=21.3284(0.0562) i=21.5605(0.0415) z=21.4508(0.1692) y=--(--) 060157.312 +390352.886 PS1_DR2_154870904887418214 g=21.7748(0.0558) r=21.4063(0.0372) i=21.6377(0.0449) z=21.4645(0.1016) y=21.2761(0.1751) MPChecker: NO DATA ASAS-SN Sky Patrol (contaminated): https://asas-sn.osu.edu/sky-patrol/coordinate/7d4ddabb-b247-4afe-9779-80670… DASCH: DASCH_J060157.3+390353 19431031.333 13.87g (Digital Access to a Sky Century @ Harvard) TCPJ06015731+3903527 20220902.554 <173g (ASAS-SN survey) TCPJ06015731+3903527 20220905.540 166g (ASAS-SN survey) TCPJ06015731+3903527 20220906.4175 12.7C (Golden Ears Observatory Transient Survey) TCPJ06015731+3903527 20220906.564 12.901o (ATLAS Forced Photometry)

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[vsnet-alert 26923] MASTER OT J001204.00-412337.4: third rebrightening
by Taichi Kato 05 Sep '22

05 Sep '22

MASTER OT J001204.00-412337.4: third rebrightening Josch Hambsch has detected the third rebrightening on Sep. 4 (mag 15.9).

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[vsnet-alert 26922] activity
by Pavol A. Dubovsky 04 Sep '22

04 Sep '22

UMABZ 20220904.037 12.66 DPV OUTBURST -- Pavol A. Dubovsky Vihorlat Observatory Humenne SLOVAKIA http://var.kozmos.sk

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