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

[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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[vsnet-newvar 9412] TCP J08182007+4413553 = AT 2022sqd = ZTF22abedept
by Naoto Kojiguchi 30 Aug '22

30 Aug '22

TCP J08182007+4413553 = AT 2022sqd = ZTF22abedept Large outburst amplitude of 7.7 mag. TCP J08182007+4413553 2022 08 30.4171* 08 18 20.07 +44 13 55.3 15.0 C Lyn 0 0 http://www.cbat.eps.harvard.edu/unconf/followups/J08182007+4413553.html 2022 08 30.4171 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 15.0 under limiting magnitude 18.0. Nothing is visible at this position on archival images taken on 2022 August 22.4670 UT (limiting mag 18.0). Discovery and Reference images can be found here: https://www.wis-tns.org/system/files/uploaded/GEOTS/tns_2022sqd_atrep_15639… TNS: https://www.wis-tns.org/object/2022sqd SDSS12: 081820.08 +441355.1 SDSSJ081820.08+441355.1 u=24.134(0.705) g=22.727(0.147) r=23.819(0.416) i=23.658(0.536) z=22.175(0.501) ZTF alert: https://lasair-ztf.lsst.ac.uk/object/ZTF22abedept https://alerce.online/object/ZTF22abedept https://mars.lco.global/?objectId=ZTF22abedept https://fink-portal.org/ZTF22abedept MPChecker: NO DATA TCPJ08182007+4413553 20220828.635 <15.700g ASN TCPJ08182007+4413553 20220829.635 14.472g ASN TCPJ08182007+4413553 20220830.4171 15.0C GEOTS TCPJ08182007+4413553 20220830.500 15.2r (ZTF Alert)

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[vsnet-newvar 9411] Re: AT2022sfe: likely highly reddened nova
by Taichi Kato 30 Aug '22

30 Aug '22

Re: AT2022sfe: likely highly reddened nova Accoring to > https://www.wis-tns.org/object/2022sfe The Gaia object appears to be the northern component of the pair. 200029.264 +345308.30 (2000.0) Gaia_EDR3_2059315910815578496 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=21.008 BP=21.178 RP=19.371 The location 20:00:29.256 +34:53:09.14 is very slightly different from this location. A faint object not in Gaia may be outbursting now.

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[vsnet-newvar 9410] AT2022sfe: likely highly reddened nova
by Taichi Kato 30 Aug '22

30 Aug '22

AT2022sfe: likely highly reddened nova Moriyama-san has pointed out the red color. YYYYMMDD(UT) mag observer 20220827.5919 15.53C (Masayuki Moriyama) 20220828.6528 15.34C (Masayuki Moriyama) 20220828.6559 14.99Rc (Masayuki Moriyama) 20220828.6576 13.51Ic (Masayuki Moriyama) 20220828.6593 <16.39B (Masayuki Moriyama) 20220828.6638 16.92:V (Masayuki Moriyama) See: https://www.wis-tns.org/object/2022sfe The object is located very close to the northern component of a close pair in the PS1 image. The Gaia object appears to be the southern component of the pair. 200029.264 +345308.30 (2000.0) Gaia_EDR3_2059315910815578496 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=21.008 BP=21.178 RP=19.371 The outbursting object may not be related to them.

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[vsnet-newvar 9409] MASTER OT J001204.00-412337.4: second rebrightening
by Taichi Kato 30 Aug '22

30 Aug '22

MASTER OT J001204.00-412337.4: second rebrightening Josch Hambsch detected the second post-superoutburst rebrightening on Aug. 27.

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[vsnet-newvar 9408] Gaia22doh
by Taichi Kato 29 Aug '22

29 Aug '22

Gaia22doh Likely reddened nova. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22doh/ Gaia22doh AT2022sie 2022-08-26 05:03:03 235.24023 -54.59284 16.89 unknown 2022-08-27 20:49:03 Apparently hostless bright red transient

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[vsnet-newvar 9407] CRTS J131103.5-414622 outburst
by Taichi Kato 26 Aug '22

26 Aug '22

CRTS J131103.5-414622 outburst Large-amplitude outburst. Gaia22dme AT2022rus 2022-08-21 05:13:56 197.76459 -41.77282 14.27 unknown 2022-08-22 16:03:39 outburst in candidate CV SSS 110423:131104-414622 http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22dme/

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