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

[vsnet-alert 26460] 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-alert 26389] Rybka 2: eclipsing SU UMa-type dwarf nova
by Denis Denisenko 24 Nov '21

24 Nov '21

This dwarf nova in Lacerta was discovered by 9th-grade student Alexandra Rybka in November 2020 while data mining from the URAT1 catalog (due to outburst at Epoch 2013.708). It was also in outburst on 1989-09-03 DSS red plate and on several PanSTARRS-1 images. AAVSO VSX entry: https://www.aavso.org/vsx/index.php?view=detail.top&oid=2214231 According to ATLAS data (Tonry et al., 2018) the latest superoutburst started on 2021 October 20th and peaked at 16.6o on Oct. 21st. Light curve from ATLAS forced photometry server in orange and cyan filters: http://scan.sai.msu.ru/~denis/Rybka2-ATLAS-LC.gif During the outbursts this variable is showing the eclipses as deep as 2 magnitudes. See, for example, the light curve of October 2019 outburst from ZTF data (Masci et al., 2018): http://scan.sai.msu.ru/~denis/Rybka2-ZTF-Oct2019.gif Using the combined ATLAS and ZTF data from four outbursts, I have found the best value of period to be P=0.0819486 d (118.006 minutes) and the epoch of mid-eclipse MJD=59513.379. After the linear detrending of outbursts (some for 0.15 mag/day, one for 0.12, the other for 0.10 mag/day) the following phased light curve was obtained: http://scan.sai.msu.ru/~denis/Rybka2-phased_LC.gif Denis Denisenko

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[vsnet-alert 26458] CS Ind superoutburst
by Taichi Kato 24 Nov '21

24 Nov '21

CS Ind superoutburst YYYYMMDD(UT) mag observer 20211105.442 168 (Rod Stubbings) 20211108.442 170 (Rod Stubbings) 20211120.457 120 (Rod Stubbings) 20211121.506 120 (Rod Stubbings) 20211122.2364 12.05C (Masao Funada)

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[vsnet-alert 26457] 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-alert 26456] 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-alert 26455] AR Pic superoutburst
by Taichi Kato 21 Nov '21

21 Nov '21

AR Pic superoutburst YYYYMMDD(UT) mag observer 20211117.476 129 (Rod Stubbings) 20211120.472 126 (Rod Stubbings)

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[vsnet-alert 26454] 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-alert 26453] CS Ind outburst
by Taichi Kato 21 Nov '21

21 Nov '21

CS Ind outburst SU UMa star with a long (0.124 d) superhump period. YYYYMMDD(UT) mag observer 20211007.485 170 (Rod Stubbings) 20211105.442 168 (Rod Stubbings) 20211108.442 170 (Rod Stubbings) 20211120.457 120 (Rod Stubbings)

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[vsnet-alert 26452] V370 Peg possible superoutburst
by Taichi Kato 21 Nov '21

21 Nov '21

V370 Peg possible superoutburst YYYYMMDD(UT) mag observer 20211119.2141 16.381zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211119.3312 16.564zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26451] 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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