November 2021 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 8997] Gaia21fik
by Taichi Kato 30 Nov '21

30 Nov '21

Gaia21fik http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fik/ Gaia21fik AT2021afrn 2021-11-15 09:19:56 197.40356 -70.83968 14.85 unknown 2021-11-29 11:52:30 bright blue hostless transient

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[vsnet-newvar 8996] ZTF J210411.01-010202.3 = Gaia21fhx
by Taichi Kato 28 Nov '21

28 Nov '21

ZTF J210411.01-010202.3 = Gaia21fhx http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fhx/ Gaia21fhx AT2021afpm 2021-11-26 11:04:51 316.04638 -1.03367 15.17 unknown 2021-11-27 16:08:10 transient on blue PanSTARRS source, candidate CV 2MASS 210411.030 -010201.98 (2000.0) 16.605 15.908 15.659 210411.0 -010202 (2000.0) ZTFJ210411.01-010202.3 r=19.566 (18.456-19.939) P=0.0296 210410.999 -010202.33 (2000.0) Gaia_DR2_6917174984897161088 plx=1.906(0.408) dismod=8.6 pmra=0.711(0.799) pmdec=-15.658(0.716) G=19.443 BP=20.723 RP=18.266 210410.999 -010202.34 (2000.0) Gaia_EDR3_6917174984897161088 plx=2.116(0.328) dismod=8.4 pmra=0.956(0.329) pmdec=-14.974(0.268) G=19.416 BP=20.761 RP=18.273 Bright in 2MASS (but red). Dwarf nova with a long orbital period?

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[vsnet-newvar 8995] Gaia21fcw fading
by Taichi Kato 28 Nov '21

28 Nov '21

Gaia21fcw fading SS Cyg star with a long orbital period? YYYYMMDD(UT) mag observer 20211104.2462 17.410zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211104.2471 17.423zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.1553 17.284zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.3030 17.231zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211106.3035 17.230zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.2198 16.561zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.2203 16.547zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211108.2238 16.535zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2421 16.036zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2426 16.020zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.2585 16.045zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211113.9181 15.25C (Masao Funada) 20211114.5755 151C (Masayuki Moriyama) 20211115.6456 147C (Masayuki Moriyama) 20211116.6623 15.06C (Masayuki Moriyama) 20211126.6568 163:C (Masayuki Moriyama)

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[vsnet-newvar 8994] CRTS J231552.3+271037 likely superoutburst
by Taichi Kato 28 Nov '21

28 Nov '21

CRTS J231552.3+271037 likely superoutburst Tyoe from ZTF data. YYYYMMDD(UT) mag observer 20211122.2023 15.255zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211125.6384 15.34C (Masayuki Moriyama) 20211126.6484 157C (Masayuki Moriyama)

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[vsnet-newvar 8993] TCP J20441708-2037591
by Taichi Kato 26 Nov '21

26 Nov '21

TCP J20441708-2037591 see http://cbat.eps.harvard.edu/unconf/followups/J20441708-2037591.html Discovered by Tadashi Kojima V=12.5 on Nov. 25 204417.241 -203801.61 (2000.0) Gaia_DR2_6857113204452224512 plx=3.459(1.629) dismod=7.3 pmra=-10.225(2.117) pmdec=-20.743(0.961) G=19.746 BP=19.447 RP=19.339 204417.241 -203801.63 (2000.0) Gaia_EDR3_6857113200158102528 plx=2.674(0.576) dismod=7.9 pmra=-10.198(0.607) pmdec=-19.955(0.376) G=19.644 BP=19.578 RP=19.504 204417.247 -203801.30 (2000.0) GALEX_DR5_6379817435984299663 NUV=19.459(0.065) FUV=19.258(0.091) No outburst in ASAS-3.

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[vsnet-newvar 8992] ASASSN-21uy: superhump period
by Taichi Kato 22 Nov '21

22 Nov '21

ASASSN-21uy: superhump period Josch Hambsch has reported further observations. The superhump period is 0.06057(4) d. The profile is still doubly humped with the second maximum fainter.

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[vsnet-newvar 8991] ASASSN-21uw: new SU UMa-type dwarf nova
by Taichi Kato 22 Nov '21

22 Nov '21

ASASSN-21uw: new SU UMa-type dwarf nova Josch Hambsch and Berto Monard have reported observations. Superhumps started to appear on Nov. 20 and the current period is 0.0557(1) d (probably stage A).

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[vsnet-newvar 8990] MASTER OT J085854.16-274030.7 outburst
by Taichi Kato 21 Nov '21

21 Nov '21

MASTER OT J085854.16-274030.7 outburst Relatively rare outburst. YYYYMMDD(UT) mag observer 20211104.7833 <142c (Yutaka Maeda) 20211106.7903 <141c (Yutaka Maeda) 20211114.7974 <136c (Yutaka Maeda) 20211116.7767 <137c (Yutaka Maeda) 20211118.8015 <143c (Yutaka Maeda) 20211119.8017 141:cG (Yutaka Maeda)

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[vsnet-newvar 8989] CRTS J081602.5+584824 likely superoutburst
by Taichi Kato 21 Nov '21

21 Nov '21

CRTS J081602.5+584824 likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20211102.1840 <165C (Eddy Muyllaert) 20211118.4328 15.467zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211120.2789 15.966zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211120.3700 15.951zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 8988] ASASSN-21uy: new SU UMa-type dwarf nova
by Taichi Kato 21 Nov '21

21 Nov '21

ASASSN-21uy: new SU UMa-type dwarf nova Berto Monard has reported observations. Humps with a period of 0.0613(5) and a mean amplitude of 0.09 mag were recorded. Although the profile was doubly humped, the overall feature did not resemble that of early superhumps. The superhumps may be in the growing phase. Further observations are needed to see whether these humps are ordinary superhumps in the growing stage or early superhumps.

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