September 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9418] 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-newvar 9417] 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-newvar 9416] ZTF18aacdxxf: WD with unusual variation
by Taichi Kato 09 Sep '22

09 Sep '22

ZTF18aacdxxf: WD with unusual variation According to the ZTF data, this object shows long-term (months) quasi-periodic fading up to 0.8 mag. It cannot be explained by eclipses by a close companion. It may be caused by periodic obscuration of the WD (such as by a dust cloud), but infrared excess is not particular. Gaia data is compatible with a very low-luminosity star (in agreement with a hot WD). 092311.4 +423633 (2000.0) WDcand G=17.449 Teff=12750 - 092311.396 +423633.61 (2000.0) Gaia_DR2_817461778282929664 plx=6.767(0.127) dismod=5.8 pmra=-9.056(0.173) pmdec=-35.130(0.218) G=17.449 BP=17.410 RP=17.487 092311.396 +423633.59 (2000.0) Gaia_EDR3_817461778282929664 plx=6.787(0.084) dismod=5.8 pmra=-8.985(0.082) pmdec=-35.216(0.069) G=17.432 BP=17.441 RP=17.500 092311.424 +423634.51 (2000.0) GALEX_DR5_6373906452883441211 NUV=17.680(0.037) FUV=18.025(0.071)

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[vsnet-newvar 9415] 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-newvar 9414] 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-newvar 9413] 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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