- vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16164] TCP J20441708-2037591: new SU UMa-type dwarf nova
by Taichi Kato 02 Dec '21

02 Dec '21

TCP J20441708-2037591: new SU UMa-type dwarf nova Josch Hambsch, Itoh-san and Kiyota-san have reported observations. According to the data by Hambsch, this object started to show superhumps on Nov. 30. Due to the short visibility in the evening sky, the superhump period has not been yet determined.

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[vsnet-campaign-dn 16163] TU Men possible superoutburst
by Taichi Kato 01 Dec '21

01 Dec '21

TU Men possible superoutburst As pointed out by Rod Stubbings in [vsnet-outburst 28070], TU Men has brightened after a possible precursor followed by a possible dip. This outburst may be a long-sought superoutburst. Although this object is known as an SU UMa star above the period gap, superhumps have only been recorded back to 1980! No true superoutbursts have been recorded since. https://ui.adsabs.harvard.edu/abs/1984A%26A...132..187S/abstract YYYYMMDD(UT) mag observer 20211127.510 165 (Rod Stubbings) 20211128.506 166 (Rod Stubbings) 20211129.487 125 (Rod Stubbings) 20211129.537 128 (Rod Stubbings) 20211129.646 129 (Rod Stubbings) 20211130.466 118 (Rod Stubbings) 20211130.507 118 (Rod Stubbings) As one can see in the above paper dealing with the 1980 superoutburst, the initial phase was not observed and there was a gap in the middle. These observations were made before we have sufficient knowledge about superhump evolution. Southern observers, please turn your telescope to TU Men and perform time-resolved photometry to cover the entire phases of the outburst. Such a chance may be only once in 40 years!

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[vsnet-campaign-dn 16162] 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-campaign-dn 16161] 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-campaign-dn 16160] PU Per superoutburst
by Taichi Kato 27 Nov '21

27 Nov '21

PU Per superoutburst (Supercycle about a year) YYYYMMDD(UT) mag observer 20211119.6658 <155cG (Yutaka Maeda) 20211120.6376 <150c (Yutaka Maeda) 20211122.919 <147 (Gary Poyner) 20211124.1721 15.181zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211124.2595 14.872zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211125.6244 148c (Yutaka Maeda) 20211126.6073 150c (Yutaka Maeda)

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[vsnet-campaign-dn 16159] Gaia21fcw fading
by Taichi Kato 27 Nov '21

27 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-campaign-dn 16158] KL Dra superoutburst?
by Taichi Kato 27 Nov '21

27 Nov '21

KL Dra superoutburst? (AM CVn) YYYYMMDD(UT) mag observer 20211108.1998 18.610zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211111.1165 18.885zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211113.1983 18.247zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211115.5638 <157C (Masayuki Moriyama) 20211119.1778 16.237zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211125.1124 16.669zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211126.5770 153C (Masayuki Moriyama)

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[vsnet-campaign-dn 16157] V1006 Cyg slowly rising outburst
by Taichi Kato 27 Nov '21

27 Nov '21

V1006 Cyg slowly rising outburst SU UMa star. YYYYMMDD(UT) mag observer 20211118.4028 <160c (Yutaka Maeda) 20211119.1576 16.070zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211119.4024 <162cG (Yutaka Maeda) 20211122.1177 17.895zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211122.1182 17.913zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211122.6191 <154C (Masayuki Moriyama) 20211125.5900 151C (Masayuki Moriyama) 20211126.5970 140C (Masayuki Moriyama)

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[vsnet-campaign-dn 16156] CRTS J231552.3+271037 likely superoutburst
by Taichi Kato 27 Nov '21

27 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-campaign-dn 16155] TCP J20441708-2037591
by Taichi Kato 25 Nov '21

25 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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