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

[vsnet-newvar 9480] KLK-42 likely superoutburst
by Taichi Kato 05 Nov '22

05 Nov '22

KLK-42 likely superoutburst WZ Sge or AM CVn. Multiple rebrightenings during the 2019 July-Aug. outburst in ZTF data. YYYYMMDD(UT) mag observer 20221029.1296 19.212zg (ZTF Alert DC mag (Masci+ 2019)) 20221029.1878 18.347zr (ZTF Alert DC mag (Masci+ 2019)) 20221031.1085 17.070zr (ZTF Alert DC mag (Masci+ 2019)) 20221031.1510 16.931zg (ZTF Alert DC mag (Masci+ 2019))

1 0

[vsnet-newvar 9479] ASASSN-19wz possible superoutburst
by Taichi Kato 05 Nov '22

05 Nov '22

ASASSN-19wz possible superoutburst Suspected type from ZTF data. YYYYMMDD(UT) mag observer 20221013.492 <176C (Mitsutaka Hiraga) 20221029.1845 17.732zr (ZTF Alert DC mag (Masci+ 2019)) 20221031.1104 15.214zr (ZTF Alert DC mag (Masci+ 2019)) 20221031.1538 15.254zg (ZTF Alert DC mag (Masci+ 2019))

1 0

[vsnet-newvar 9478] SDSS J001153.08-064739.1 second rebrightening
by Taichi Kato 05 Nov '22

05 Nov '22

SDSS J001153.08-064739.1 second rebrightening See vsnet-alert 26991, unusual SU UM star in the period gap and has showed multiple rebrightenings as expected. 20221020.6741 16.31C (Masayuki Moriyama) 20221021.2598 16.771zg (ZTF Alert DC mag (Masci+ 2019)) 20221023.5665 14.97C (Masayuki Moriyama) (first) 20221024.6649 15.31C (Masayuki Moriyama) 20221025.6981 16.22C (Masayuki Moriyama) 20221027.7208 165:C (Masayuki Moriyama) 20221028.1280 16.968V (Filipp Romanov) 20221028.1288 17.109V (Filipp Romanov) 20221028.1296 16.652V (Filipp Romanov) 20221028.1304 17.077V (Filipp Romanov) 20221028.1312 16.813V (Filipp Romanov) 20221028.1320 16.772V (Filipp Romanov) 20221028.1328 17.026V (Filipp Romanov) 20221028.1335 16.673V (Filipp Romanov) 20221028.1402 16.829V (Filipp Romanov) 20221028.1410 16.729V (Filipp Romanov) 20221028.1418 17.317V (Filipp Romanov) 20221028.1426 16.946V (Filipp Romanov) 20221028.1434 17.169V (Filipp Romanov) 20221028.1441 16.963V (Filipp Romanov) 20221028.1449 16.831V (Filipp Romanov) 20221028.1457 16.655V (Filipp Romanov) 20221028.1465 17.125V (Filipp Romanov) 20221028.1473 17.267V (Filipp Romanov) 20221028.1481 16.743V (Filipp Romanov) 20221028.1533 17.288V (Filipp Romanov) 20221028.1596 16.947V (Filipp Romanov) 20221028.1604 16.582V (Filipp Romanov) 20221028.1612 16.876V (Filipp Romanov) 20221028.1620 16.606V (Filipp Romanov) 20221028.1628 16.660V (Filipp Romanov) 20221028.5600 170:C (Masayuki Moriyama) 20221029.6542 167:C (Masayuki Moriyama) 20221030.2286 17.108zg (ZTF Alert DC mag (Masci+ 2019)) 20221030.6376 16.92C (Masayuki Moriyama) 20221101.6840 166:C (Masayuki Moriyama) 20221102.6765 14.92C (Masayuki Moriyama) (second) 20221103.5717 15.55C (Masayuki Moriyama)

1 0

[vsnet-newvar 9477] TCP J06382808-0844347: new SU UMa-type dwarf nova
by Taichi Kato 05 Nov '22

05 Nov '22

TCP J06382808-0844347: new SU UMa-type dwarf nova Itoh-san (and some from Josch Hambsch) reported observations. This object is an SU UMa star with a superhump period of 0.05457(2) d (mean amplitude 0.07 mag). A small degree of ambiguity about one-day aliases remains.

1 0

[vsnet-newvar 9476] KIC 11390659: new SU UMa-type dwarf nova with unusual characteristics
by Taichi Kato 05 Nov '22

05 Nov '22

KIC 11390659: new SU UMa-type dwarf nova with unusual characteristics This object underwent an outburst on Oct. 15 (vsnet-alert 26986), which faded rapidly (vsnet-alert 26997). During this fading (precursor), Tamas Tordai and Vihorlat Observatory team recorded superhumps. On Oct. 19, Itoh-san also reported large-amplitude superhumps (nearly 1 mag) when the object was in a dip before the full superoutburst. This phenomenon was also reported by Tonny Vanmunster as "PECULIAR STAR", but after that VSNET network was disconnected. Using the available data during the superoutburst plateau, the superhump period was 0.079679(8) d. The mean amplitude was large (0.23 mag). The plateau was short (Oct. 20-27) and the object started fading rapidly again. Following this, there was a rebrightening on Nov. 2-3 (apparently a normal outburst). The short duration of the plateau was unusual for an SU UMa star with this period. Further observations are still wanted. It was a pity that VSNET was down during this event. Please send your observations (if there were) not reaching the VSNET addresses again (time-series CCD data to vsnet-campaign-report(a)ooruri.kusastro.kyoto-u.ac.jp as before), and please send new data as before. The system problem was probably caused by an excessive amount of bounces in a certain provider, and announcement of full operation of VSNET and what should be done by the subscriber's side are expected to be given by D. Nogami, the manager.

1 0

[vsnet-newvar 9474] ASASSN-22ng
by Naoto Kojiguchi 02 Nov '22

02 Nov '22

ASASSN-22ng Large outburst amplitude of 6 mag. Possible WZ Sge-type dwarf nova. ASASSN-22ng -- ------- 20:36:49.34 -21:25:56.3 2022-10-30.12 14.95 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.3, g>18.0 on 2022-10-29.13, g=15.2 on 2022-10-30.12 203649.231 -212556.999 PS1_DR1_82283092051261352 g=21.2999(0.0278) r=21.3767(0.0387) i=21.4027(0.0428) z=20.4041(0.2201) y=--(--) ZTF alert https://fink-portal.org/ZTF22abrrxsd https://lasair.roe.ac.uk/object/ZTF22abrrxsd https://alerce.online/object/ZTF22abrrxsd https://mars.lco.global/?objectId=ZTF22abrrxsd MPChecker NO DATA 20221029.062 20.061cy ATF 20221029.065 20.297cy ATF 20221029.137 <16.944g ASN 20221029.138 <17.086g ASN 20221029.139 <17.196g ASN 20221030.023 16.489o ATF 20221030.026 16.438o ATF 20221030.036 16.324o ATF 20221030.125 15.280g ASN 20221030.126 15.159g ASN 20221030.127 15.141zg ZAL 20221030.128 15.142g ASN ATF (ATLAS Forced Photometry (Tonry et al. 2018)) ASN (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) ZAL (Zwicky Transient Facility ALeRCE (Masci+ 2019; Forster, F. 2021))

1 0

[vsnet-newvar 9475] ASASSN-22ng
by Naoto Kojiguchi 02 Nov '22

02 Nov '22

ASASSN-22ng Large outburst amplitude of 6 mag. Possible WZ Sge-type dwarf nova. ASASSN-22ng -- ------- 20:36:49.34 -21:25:56.3 2022-10-30.12 14.95 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.3, g>18.0 on 2022-10-29.13, g=15.2 on 2022-10-30.12 203649.231 -212556.999 PS1_DR1_82283092051261352 g=21.2999(0.0278) r=21.3767(0.0387) i=21.4027(0.0428) z=20.4041(0.2201) y=--(--) ZTF alert https://fink-portal.org/ZTF22abrrxsd https://lasair.roe.ac.uk/object/ZTF22abrrxsd https://alerce.online/object/ZTF22abrrxsd https://mars.lco.global/?objectId=ZTF22abrrxsd MPChecker NO DATA 20221029.062 20.061cy ATF 20221029.065 20.297cy ATF 20221029.137 <16.944g ASN 20221029.138 <17.086g ASN 20221029.139 <17.196g ASN 20221030.023 16.489o ATF 20221030.026 16.438o ATF 20221030.036 16.324o ATF 20221030.125 15.280g ASN 20221030.126 15.159g ASN 20221030.127 15.141zg ZAL 20221030.128 15.142g ASN ATF (ATLAS Forced Photometry (Tonry et al. 2018)) ASN (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) ZAL (Zwicky Transient Facility ALeRCE (Masci+ 2019; Forster, F. 2021))

1 0

[vsnet-newvar 9473] ASASSN-22nj
by Naoto Kojiguchi 02 Nov '22

02 Nov '22

ASASSN-22nj This outburst started on 2022 Oct. 26. 6 mag blue (g-r ~ -0.2) outburst. The fading rate is 0.16 mag. A possible counterpart is a red source (g-r ~ 1.3) near the Galactic plane ((l, b) = (203.64415979, 13.77921032)). Possible WZ Sge star or MisV1448-like object. ASASSN-22nj -- ------- 7:24:47.76 14:21:56.7 2022-10-30.29 14.95 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.6, g>18.0 on 2022-10-26.33, g=14.7 on 2022-10-27.30, g=15.3 on 2022-10-30.29, g=15.4 on 2022-10-31.28 072447.714 +142156.957 Gaia_DR2_3166729483840162560 Plx=0.9417(0.4148) dismod=10.1 pmRA=1.092(0.714) pmDE=2.319(0.735) G=19.3379(0.0042) BP-RP=1.757 E(g-r)=0.090 E(B-V)=0.080 Ag=0.317 Ar=0.236 Ai=0.177 072447.713 +142156.907 Gaia_EDR3_3166729483840162560 Plx=1.1043(0.3517) dismod=9.8 PM=3.236 pmRA=0.331(0.376) pmDE=3.219(0.294) G=19.290237(0.004648) BP-RP=1.986935 E(g-r)=0.090 E(B-V)=0.080 Ag=0.317 Ar=0.236 Ai=0.177 072447.714 +142156.955 PS1_DR1_125231111988249485 g=20.6029(0.0192) r=19.3689(0.0089) i=18.7082(0.0096) z=18.417(0.0189) y=18.2375(0.021) 072447.717 +142156.976 PS1_DR2_125231111988249485 g=20.6037(0.018622) r=19.3338(0.00514) i=18.7018(0.004726) z=18.4009(0.005881) y=18.1924(0.01298) 072447.71 +142156.9 SDSSJ072447.71+142156.9 ObsDate=2007.1412 u=24.113(0.961) g=20.817(0.029) r=19.367(0.014) i=18.758(0.011) z=18.296(0.022) ZTF alert https://fink-portal.org/ZTF22abqohdk https://lasair.roe.ac.uk/object/ZTF22abqohdk https://alerce.online/object/ZTF22abqohdk https://mars.lco.global/?objectId=ZTF22abqohdk MPChecker NO DATA 20221024.557 20.127cy ATF 20221026.338 <17.134g ASN 20221026.339 <17.105g ASN 20221026.340 <17.112g ASN 20221026.425 19.812zg ZAL 20221026.501 18.642zr ZAL 20221027.305 14.640g ASN 20221027.307 14.656g ASN 20221027.342 15.012cy ATF 20221027.345 14.972cy ATF 20221027.362 14.949cy ATF 20221027.366 14.947cy ATF 20221028.434 14.678zg ZAL 20221028.501 14.881zr ZAL 20221029.035 14.918o ATF 20221029.043 15.383o ATF 20221029.054 15.475o ATF 20221030.290 15.182g ASN 20221030.292 15.231g ASN 20221030.293 15.132g ASN 20221030.579 15.695o ATF 20221030.583 15.709o ATF 20221030.592 15.399cy ATF 20221030.594 15.425cy ATF 20221030.597 15.447cy ATF 20221030.597 15.692o ATF 20221030.602 15.710o ATF 20221030.619 15.424cy ATF 20221031.284 15.364g ASN 20221031.285 15.401g ASN 20221031.286 15.395g ASN 20221031.451 15.538zr ZAL 20221031.487 15.353zg ZAL 20221031.576 15.818o ATF 20221031.579 15.850o ATF 20221031.582 15.912o ATF 20221031.591 15.848o ATF 20221101.441 15.466g ASN 20221101.442 15.575g ASN 20221101.443 15.580g ASN 20221101.611 16.027o ATF 20221101.618 15.993o ATF 20221101.645 15.997o ATF 20221101.648 15.970o ATF 20221102.436 15.717g ASN 20221102.438 15.747g ASN 20221102.439 15.742g ASN 20221102.573 15.881cy ATF 20221102.576 15.891cy ATF 20221102.580 15.905cy ATF ATF (ATLAS Forced Photometry (Tonry et al. 2018)) ASN (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) ZAL (Zwicky Transient Facility ALeRCE (Masci+ 2019; Forster, F. 2021))

1 0