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

[vsnet-alert 27004] 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.

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[vsnet-alert 27003] 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.

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[vsnet-alert 27001] 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))

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[vsnet-alert 27002] 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))

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[vsnet-alert 27000] 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))

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[vsnet-alert 26960] V381 Lac: brightest ever detected
by Taichi Kato 01 Nov '22

01 Nov '22

V381 Lac: brightest ever detected Several observers has noticed this brightening. YYYYMMDD(UT) mag observer 20210803.6329 <142cG (Yutaka Maeda) 20210806.6514 <149cG (Yutaka Maeda) 20210810.5941 <130cG (Yutaka Maeda) 20210820.5618 <161C (Masayuki Moriyama) 20210828.5687 <147cG (Yutaka Maeda) 20210908.7362 154C (Masayuki Moriyama) 20210908.7370 <156V (Masayuki Moriyama) 20210911.6637 153:C (Masayuki Moriyama) 20210914.5012 16.15V (Minoru Sato) 20210919.4885 <139cG (Yutaka Maeda) 20210919.692 138C (Mitsutaka Hiraga) 20210920.4901 15.97V (Minoru Sato) 20210922.4253 <133cG (Yutaka Maeda) 20210923.7509 142C (Masayuki Moriyama) 20210923.7520 155:V (Masayuki Moriyama) 20210928.6755 140C (Masayuki Moriyama) 20210928.6764 15.12V (Masayuki Moriyama) 20210928.6775 13.55Rc (Masayuki Moriyama) 20210928.6784 12.16Ic (Masayuki Moriyama) 20210928.6815 <15.37B (Masayuki Moriyama) 20211001.656 131C (Mitsutaka Hiraga) 20211001.7101 137C (Masayuki Moriyama) 20211001.7106 147V (Masayuki Moriyama) 20211004.5752 <147cG (Yutaka Maeda) 20211007.7087 13.42C (Masayuki Moriyama) 20211007.7087 150:V (Masayuki Moriyama) 20211010.4138 14.66V (Minoru Sato) 20211013.635 126C (Mitsutaka Hiraga) 20211013.7271 132C (Masayuki Moriyama) 20211017.7057 141V (Masayuki Moriyama) 20211019.6298 13.08C (Masayuki Moriyama) 20211019.6317 14.16V (Masayuki Moriyama) 20211023.7075 130C (Masayuki Moriyama) 20211025.628 125C (Mitsutaka Hiraga) 20211026.6401 129C (Masayuki Moriyama) 20211029.5316 140cG (Yutaka Maeda) 20211029.6413 131C (Masayuki Moriyama) 20211030.4275 14.17V (Minoru Sato) 20211101.4979 141:cG (Yutaka Maeda) 20211102.6370 128C (Masayuki Moriyama) 20211102.6379 14.33V (Masayuki Moriyama) 20211103.5404 139:cG (Yutaka Maeda) 20211106.4849 13.99V (Minoru Sato) 20211106.6904 127C (Masayuki Moriyama) 20211107.4731 <124cG (Yutaka Maeda) 20211110.550 142c (Tadashi Kojima) 20211115.6260 125C (Masayuki Moriyama) 20211116.5039 13.73V (Minoru Sato) 20211118.5044 136:cG (Yutaka Maeda) 20211119.6464 125C (Masayuki Moriyama) 20211119.6472 13.85V (Masayuki Moriyama) 20211126.6247 125C (Masayuki Moriyama) 20211126.6256 135V (Masayuki Moriyama) 20211204.4036 138cG (Yutaka Maeda) 20211208.3977 139cG (Yutaka Maeda) 20211213.5845 126C (Masayuki Moriyama) 20211221.5145 129C (Masayuki Moriyama) 20211223.3971 143:cG (Yutaka Maeda) 20211223.487 126C (Mitsutaka Hiraga) 20211231.3889 <146cG (Yutaka Maeda) 20220103.3965 <149cG (Yutaka Maeda) 20220104.5293 147:V (Masayuki Moriyama) 20220104.5301 133C (Masayuki Moriyama) 20220108.3997 <144cG (Yutaka Maeda) 20220127.4834 131C (Masayuki Moriyama) 20220211.4748 131C (Masayuki Moriyama) 20220401.8518 120C (Masayuki Moriyama) 20220418.8004 11.59C (Masayuki Moriyama) 20220418.8014 12.61V (Masayuki Moriyama) 20220419.7881 125V (Masayuki Moriyama) 20220504.7593 114C (Masayuki Moriyama) 20220504.7600 123V (Masayuki Moriyama) 20220507.7700 128cG (Yutaka Maeda) 20220517.6558 12.47V (Minoru Sato) 20220517.7700 126cG (Yutaka Maeda) 20220518.6976 113C (Masayuki Moriyama) 20220518.6995 12.35V (Masayuki Moriyama) 20220531.7200 127cG (Yutaka Maeda) 20220603.8091 12.29V (Masayuki Moriyama) 20220608.6478 12.48V (Minoru Sato) 20220630.633 131c (Tadashi Kojima) 20220701.7484 122V (Masayuki Moriyama) 20220708.6434 12.24V (Minoru Sato) 20220719.7289 119V (Masayuki Moriyama) 20220725.6165 11.88V (Minoru Sato) 20220729.5722 11.92V (Minoru Sato) 20220802.6500 120cG (Yutaka Maeda) 20220805.5827 11.82V (Minoru Sato) 20220807.6500 120cG (Yutaka Maeda) 20220808.7848 113C (Masayuki Moriyama) 20220808.7896 11.67V (Masayuki Moriyama) 20220809.594 118C (Mitsutaka Hiraga) 20220814.4518 11.79V (Minoru Sato) 20220821.6035 11.84V (Minoru Sato) 20220822.7046 116V (Masayuki Moriyama) 20220825.7812 11.64V (Masayuki Moriyama) 20220826.7320 116V (Masayuki Moriyama) 20220828.5231 11.78V (Minoru Sato) 20220904.4461 11.73V (Minoru Sato) 20220910.3961 11.73V (Minoru Sato) 20220914.4012 11.76V (Minoru Sato) 20220916.7247 117V (Masayuki Moriyama) 20220921.4560 11.91V (Minoru Sato) 20220924.482 119c (Tadashi Kojima) 20220926.4529 12.08V (Minoru Sato) 20220927.6681 11.94V (Masayuki Moriyama) 20220929.596 125c (Tadashi Kojima) 20221001.4915 12.16V (Minoru Sato)

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[vsnet-alert 26998] ASASSN-15pj still in outburst
by Taichi Kato 20 Oct '22

20 Oct '22

ASASSN-15pj still in outburst YYYYMMDD(UT) mag observer 20221008.4356 16.663zr (ZTF Alert DC mag (Masci+ 2019)) 20221008.5108 17.296zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.3683 15.764zr (ZTF Alert DC mag (Masci+ 2019)) 20221012.6783 157:c (Yutaka Maeda) 20221012.6783 157:c (Yutaka Maeda) 20221013.6846 <155c (Yutaka Maeda) 20221014.6642 <150c (Yutaka Maeda) 20221015.6768 157:c (Yutaka Maeda) 20221017.3726 16.106zr (ZTF Alert DC mag (Masci+ 2019)) 20221018.6800 162:c (Yutaka Maeda)

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[vsnet-alert 26997] KIC11390659 fading rapidly
by Taichi Kato 19 Oct '22

19 Oct '22

KIC11390659 fading rapidly YYYYMMDD(UT) mag observer 20221012.1327 16.652zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.500 165C (Mitsutaka Hiraga) 20221012.6669 <162C (Masayuki Moriyama) 20221013.6258 163:C (Masayuki Moriyama) 20221015.487 125 (Hiroyuki Maehara) 20221016.826 13.12C (Gary Poyner) 20221016.8263 13.00C (Masao Funada) 20221017.6023 143C (Masayuki Moriyama) 20221018.567 151 (Hiroyuki Maehara)

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[vsnet-alert 26996] MN Dra likely superoutburst
by Taichi Kato 19 Oct '22

19 Oct '22

MN Dra likely superoutburst YYYYMMDD(UT) mag observer 20221011.3215 20.278zg (ZTF Alert DC mag (Masci+ 2019)) 20221011.3412 18.740zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.5363 <157c (Yutaka Maeda) 20221012.6207 <170C (Masayuki Moriyama) 20221013.1579 20.072zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.1584 19.046zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.2022 19.701zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.2251 19.256zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.5429 <154c (Yutaka Maeda) 20221014.5208 <154c (Yutaka Maeda) 20221014.6231 <165C (Masayuki Moriyama) 20221015.1359 16.725zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1388 16.818zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1786 16.649zr (ZTF Alert DC mag (Masci+ 2019)) 20221015.1828 16.569zr (ZTF Alert DC mag (Masci+ 2019)) 20221015.5354 <153c (Yutaka Maeda) 20221017.6507 159:C (Masayuki Moriyama)

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[vsnet-alert 26995] CRTSJ035318.1-034847 possible superoutburst
by Taichi Kato 19 Oct '22

19 Oct '22

CRTSJ035318.1-034847 possible superoutburst Type from ZTF data. Supercycle about 90 d. YYYYMMDD(UT) mag observer 20221010.3980 18.602zg (ZTF Alert DC mag (Masci+ 2019)) 20221010.4414 19.389zr (ZTF Alert DC mag (Masci+ 2019)) 20221012.3725 17.943zr (ZTF Alert DC mag (Masci+ 2019)) 20221012.4425 18.293zg (ZTF Alert DC mag (Masci+ 2019)) 20221017.1745 15.26C (Masao Funada)

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