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

[vsnet-alert 27011] 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))

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[vsnet-alert 27010] RY Sgr now brightening
by Taichi Kato 05 Nov '22

05 Nov '22

RY Sgr now brightening YYYYMMDD(UT) mag observer 20221014.4355 13.03V (Masayuki Moriyama) 20221014.465 130 (Hiroyuki Maehara) 20221015.3597 13.01V (Minoru Sato) 20221015.447 131 (Hiroyuki Maehara) 20221016.417 <128 (Takuichiro Onishi) 20221017.5285 128C (Masayuki Moriyama) 20221017.5301 130:V (Masayuki Moriyama) 20221019.3639 12.96V (Minoru Sato) 20221019.4001 12.43V (Seiichiro Kiyota) 20221019.4006 11.97Rc (Seiichiro Kiyota) 20221019.4010 11.54Ic (Seiichiro Kiyota) 20221019.4147 13.11V (Masayuki Moriyama) 20221019.442 131 (Takuichiro Onishi) 20221020.3559 12.94V (Minoru Sato) 20221020.3727 13.81B (Seiichiro Kiyota) 20221020.3732 12.59V (Seiichiro Kiyota) 20221020.3736 12.06Rc (Seiichiro Kiyota) 20221020.3740 11.58Ic (Seiichiro Kiyota) 20221021.3684 13.65B (Seiichiro Kiyota) 20221021.3688 12.55V (Seiichiro Kiyota) 20221021.3692 12.02Rc (Seiichiro Kiyota) 20221021.3697 11.59Ic (Seiichiro Kiyota) 20221021.431 128 (Takuichiro Onishi) 20221022.417 132 (Takuichiro Onishi) 20221023.4832 130:V (Masayuki Moriyama) 20221024.3487 12.60V (Minoru Sato) 20221025.3477 12.63V (Minoru Sato) 20221025.4712 12.37V (Masayuki Moriyama) 20221026.3564 13.50B (Seiichiro Kiyota) 20221026.3569 12.55V (Seiichiro Kiyota) 20221026.3573 12.02Rc (Seiichiro Kiyota) 20221026.3577 11.57Ic (Seiichiro Kiyota) 20221026.399 129 (Takuichiro Onishi) 20221027.4493 12.25V (Masayuki Moriyama) 20221028.3593 13.45B (Seiichiro Kiyota) 20221028.3597 12.56V (Seiichiro Kiyota) 20221028.3602 12.08Rc (Seiichiro Kiyota) 20221028.3606 11.63Ic (Seiichiro Kiyota) 20221029.3541 13.51B (Seiichiro Kiyota) 20221029.3545 12.48V (Seiichiro Kiyota) 20221029.3549 12.03Rc (Seiichiro Kiyota) 20221029.3554 11.50Ic (Seiichiro Kiyota) 20221029.397 125 (Takuichiro Onishi) 20221029.4153 12.16V (Masayuki Moriyama) 20221030.3596 12.64V (Seiichiro Kiyota) 20221030.3600 12.11Rc (Seiichiro Kiyota) 20221030.3605 11.60Ic (Seiichiro Kiyota) 20221031.3629 13.67B (Seiichiro Kiyota) 20221031.3633 12.65V (Seiichiro Kiyota) 20221031.3638 12.08Rc (Seiichiro Kiyota) 20221031.3642 11.67Ic (Seiichiro Kiyota) 20221102.392 122 (Takuichiro Onishi) 20221102.4028 12.05V (Masayuki Moriyama) 20221103.399 119 (Takuichiro Onishi)

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[vsnet-alert 27009] 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)

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[vsnet-alert 27008] CC Cnc superoutburst
by Taichi Kato 05 Nov '22

05 Nov '22

CC Cnc superoutburst YYYYMMDD(UT) mag observer 20221020.8072 <155c (Yutaka Maeda) 20221022.1350 <177C (Masao Funada) 20221023.7906 <159c (Yutaka Maeda) 20221024.7781 <162c (Yutaka Maeda) 20221025.8592 <158c (Yutaka Maeda) 20221026.792 <134 (Tsuneo Horie) 20221027.4734 14.316zg (ZTF Alert DC mag (Masci+ 2019)) 20221027.8516 133cG (Yutaka Maeda) 20221028.2497 13.58C (Masao Funada) 20221028.769 143C (Mitsutaka Hiraga) 20221028.774 <134 (Tsuneo Horie) 20221030.8637 133cG (Yutaka Maeda) 20221101.803 136 (Tsuneo Horie) 20221102.8122 134cG (Yutaka Maeda) 20221102.8122 134cG (Yutaka Maeda) 20221103.7806 135cG (Yutaka Maeda) 20221103.7806 135cG (Yutaka Maeda) 20221103.783 137 (Tsuneo Horie)

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[vsnet-alert 27007] CM Del large-amplitude variations
by Taichi Kato 05 Nov '22

05 Nov '22

CM Del large-amplitude variations Moriyama-san had detected them. YYYYMMDD(UT) mag observer 20220906.7502 141C (Masayuki Moriyama) 20220909.6453 13.49C (Masayuki Moriyama) 20220913.5973 13.53C (Masayuki Moriyama) 20220914.6743 13.47C (Masayuki Moriyama) 20220915.6438 134cG (Yutaka Maeda) 20220916.7140 13.75C (Masayuki Moriyama) 20220917.2812 14.038zg (ZTF Alert DC mag (Masci+ 2019)) 20220925.1510 15.488zg (ZTF Alert DC mag (Masci+ 2019)) 20220925.1745 15.338zr (ZTF Alert DC mag (Masci+ 2019)) 20220927.6242 13.75C (Masayuki Moriyama) 20220929.6267 133cG (Yutaka Maeda) 20220929.6293 136C (Masayuki Moriyama) 20220930.6854 13.75C (Masayuki Moriyama) 20221001.1499 14.082zg (ZTF Alert DC mag (Masci+ 2019)) 20221001.2050 14.023zr (ZTF Alert DC mag (Masci+ 2019)) 20221001.6733 13.87C (Masayuki Moriyama) 20221002.6057 139C (Masayuki Moriyama) 20221005.1903 14.950zr (ZTF Alert DC mag (Masci+ 2019)) 20221005.5553 145C (Masayuki Moriyama) 20221007.1713 16.858zg (ZTF Alert DC mag (Masci+ 2019)) 20221008.5492 145:C (Masayuki Moriyama) 20221009.2434 16.327zr (ZTF Alert DC mag (Masci+ 2019)) 20221011.1760 17.239zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.6367 14.88C (Masayuki Moriyama) 20221013.1854 15.658zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.6716 143C (Masayuki Moriyama) 20221014.6600 13.80C (Masayuki Moriyama) 20221015.1663 13.580zr (ZTF Alert DC mag (Masci+ 2019)) 20221015.6543 13.61C (Masayuki Moriyama) 20221017.6692 137C (Masayuki Moriyama) 20221019.6365 13.55C (Masayuki Moriyama) 20221020.6488 136C (Masayuki Moriyama) 20221021.1611 14.000zr (ZTF Alert DC mag (Masci+ 2019)) 20221025.1319 15.616zr (ZTF Alert DC mag (Masci+ 2019)) 20221025.2268 16.133zg (ZTF Alert DC mag (Masci+ 2019)) 20221025.6052 14.85C (Masayuki Moriyama) 20221027.1317 17.240zr (ZTF Alert DC mag (Masci+ 2019)) 20221027.6536 <144C (Masayuki Moriyama) 20221028.6011 15.56C (Masayuki Moriyama) 20221029.5749 15.61C (Masayuki Moriyama) 20221030.5940 15.92C (Masayuki Moriyama) 20221031.4794 <153C (Masayuki Moriyama) 20221101.6019 15.80C (Masayuki Moriyama) 20221102.6002 159:C (Masayuki Moriyama) 20221103.5938 162:C (Masayuki Moriyama)

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[vsnet-alert 27006] V538 Mon brightening
by Taichi Kato 05 Nov '22

05 Nov '22

V538 Mon brightening Moriyama-san and Kojima-san have detected brightening of this unusual object. YYYYMMDD(UT) mag observer 20220302.2048 14.930zg (Zwicky Transient Facility (Masci et al., 2019)) 20220302.2048 15.016zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220324.5845 144C (Masayuki Moriyama) 20220402.1521 14.443zr (Zwicky Transient Facility (Masci et al., 2019)) 20220403.5566 142V (Masayuki Moriyama) 20220405.1542 14.494zg (Zwicky Transient Facility (Masci et al., 2019)) 20220405.2061 14.233zr (Zwicky Transient Facility (Masci et al., 2019)) 20220407.1549 14.051zr (Zwicky Transient Facility (Masci et al., 2019)) 20220407.2037 14.356zg (Zwicky Transient Facility (Masci et al., 2019)) 20220409.1595 14.613zg (Zwicky Transient Facility (Masci et al., 2019)) 20220409.1971 14.493zr (Zwicky Transient Facility (Masci et al., 2019)) 20220413.1624 14.598zr (Zwicky Transient Facility (Masci et al., 2019)) 20220413.1757 14.790zg (Zwicky Transient Facility (Masci et al., 2019)) 20220416.1616 14.753zg (Zwicky Transient Facility (Masci et al., 2019)) 20220416.1998 14.614zr (Zwicky Transient Facility (Masci et al., 2019)) 20220418.1814 14.630zg (Zwicky Transient Facility (Masci et al., 2019)) 20220418.5398 144C (Masayuki Moriyama) 20220927.8218 123C (Masayuki Moriyama) 20221017.8553 122C (Masayuki Moriyama) 20221029.7559 117c (Tadashi Kojima) 20221030.6906 123C (Masayuki Moriyama) Subject: [vsnet-chat 8618] V538 Mon (2021 July 1) https://www.aavso.org/vsx/index.php?view=detail.top&oid=19366 Type: AM: in unlikely. Too bright. Subject: [vsnet-chat 8161] V538 Mon: stange variable (2018 Sep. 6) V538 Mon: stange variable ASAS-SN data (combined light): https://asas-sn.osu.edu/light_curves/8fec5b82-fa72-4fad-a016-2e1fb02d25bd It's not EA: (as in GCVS). The object is too faint for a typical EXOR. 062416.229 +053640.05 (2000.0) Gaia_DR2_3323819257020229888 plx=1.396(0.053) dismod=9.3 pmra=-2.116(0.066) pmdec=0.626(0.058) G=13.822 BP=13.742 RP=13.355 I suspect that the object may be an Z Cam/NL object which spent most of 2017 in low state (currently brighter again). Spectroscopic observations will be interesting. === The type is currently given as UGZ//IW: | NL: in VSX. The nature of this object is not yet understood. 062416.2 +053640 (2000.0) Gaia19dqa vtype=YSO TNSid=AT2019oap Comment=know_YSO_(EXOR)_V0538_Mon_brightens_by_2.5_mag 062416.229 +053640.05 (2000.0) Gaia_EDR3_3323819257020229888 plx=1.461(0.024) dismod=9.2 pmra=-2.119(0.024) pmdec=0.722(0.023) G=13.909 BP=13.894 RP=13.598 Could be a YSO considering the possible association with AKARI-IRC J0624162+053638, but the object is too blue in the optical.

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[vsnet-alert 27005] Complete list of VSNET lists
by Taichi Kato 05 Nov '22

05 Nov '22

Complete list of VSNET lists Just for information, the complete list of VSNET lists can be seen at http://ooruri.kusastro.kyoto-u.ac.jp If you consider that your address was removed from some of these lists during the recent incident, please click the list name and see the link "more information about this list" and follow the instruction for controlling the subscription. Only a part of lists are archived and can be seen through "hyperkitty" archives. Just visit the above URL to see and find, if necessary, the lists you may want to join (the meaning of the list will be self-evident only if you know the GCVS classification).

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[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 03 Nov '22

03 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 November 2022