October 2021 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26351] Gaia17abv likely superoutburst
by Taichi Kato 24 Oct '21

24 Oct '21

Gaia17abv likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20211023.1434 16.579zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211023.1547 16.512zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211023.1979 16.237zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211023.1988 16.250zg (Zwicky Transient Facility Lasair (Masci+ 2019))

1 0

[vsnet-alert 26350] ASASSN-17fo outburst
by Taichi Kato 24 Oct '21

24 Oct '21

ASASSN-17fo outburst Eclipsing SU UMa star. YYYYMMDD(UT) mag observer 20211022.5343 16.166zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211022.5367 16.214zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211022.5391 16.240zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211022.5415 16.198zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211022.5438 16.238zr (Zwicky Transient Facility Lasair (Masci+ 2019))

1 0

[vsnet-alert 26349] CRTS J215636.3+193242 outburst
by Taichi Kato 24 Oct '21

24 Oct '21

CRTS J215636.3+193242 outburst Eclipsing possible SU UMa star. YYYYMMDD(UT) mag observer 20211023.1814 16.558zr (Zwicky Transient Facility Lasair (Masci+ 2019))

1 0

[vsnet-alert 26348] CRTS J043112.4-031452 outburst
by Taichi Kato 24 Oct '21

24 Oct '21

CRTS J043112.4-031452 outburst Eclipsing SU UMa star. YYYYMMDD(UT) mag observer 20210918.3238 <166C (Masao Funada) 20211009.2245 178cG (Masao Funada) 20211022.3397 15.806zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211022.3946 15.685zg (Zwicky Transient Facility Lasair (Masci+ 2019))

1 0

[vsnet-alert 26347] CRTS J172929.1+201808 possible superoutburst
by Taichi Kato 24 Oct '21

24 Oct '21

CRTS J172929.1+201808 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20211023.1556 16.970zr (Zwicky Transient Facility Lasair (Masci+ 2019))

1 0

[vsnet-alert 26346] ASASSN-19ty likely superoutburst
by Taichi Kato 24 Oct '21

24 Oct '21

ASASSN-19ty likely superoutburst Type from ZTF data. Time-resolved observations are encouraged. YYYYMMDD(UT) mag observer 20211023.1927 15.353zg (Zwicky Transient Facility Lasair (Masci+ 2019))

1 0

[vsnet-alert 26345] V585 Lyr bright outburst since 2012
by 前田豊 23 Oct '21

23 Oct '21

UGSU star V585 Lyr bright outburst since 2012. LYRV585 20211022.49159 140c Mdy.VSOLJ MAEDA Yutaka Nagasaki Japan

1 0

[vsnet-alert 26344] PT Per (polar): historically high state
by Taichi Kato 22 Oct '21

22 Oct '21

PT Per (polar): historically high state This polar has been in very bright state since 2020 Sep (around zr=15.0 in 2021 June in ZTF data). This state is more than 1 mag brighter than when Thorstensen et al. (2020) AJ 160, 70 observed this system in 2019 Jan. Double maxima per one orbital cycle are present in ZTF data.

1 0

[vsnet-alert 26343] 1RXS J174726.1-300138 = Gaia21eso outburst
by Taichi Kato 22 Oct '21

22 Oct '21

1RXS J174726.1-300138 = Gaia21eso outburst http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21eso/ Gaia21eso AT2021abxc 2021-10-15 03:44:16 266.85507 -30.03785 18.75 20.42 0.54 unknown 2021-10-21 12:28:55 ~2 mag outburst in Gaia source near Galactic centre, previous event seen Also known as LMXB 1744-300.

1 0

[vsnet-alert 26342] ASASSN-21tp
by Taichi Kato 21 Oct '21

21 Oct '21

ASASSN-21tp ASASSN-21tp --- ------- 8:46:11.18 -47:28:14.3 2021-10-21.33 13.84 SDSS DSS VIZIER ------- outburst from a previously non-variable star, matches to GAIA DR2 G=13.6, The ASAS-SN light curve for the last 300 days, the big spikes near g=12 are data artifacts. Very unusual object. Basic data: 2MASS 084611.130 -472813.69 (2000.0) 12.322 12.041 11.995 084611.124 -472813.65 (2000.0) Gaia_DR2_5329521945789287040 plx=0.964(0.015) dismod=10.1 pmra=-5.781(0.028) pmdec=9.573(0.027) G=13.602 BP=13.987 RP=13.045 084611.123 -472813.65 (2000.0) Gaia_EDR3_5329521945789287040 plx=0.986(0.011) dismod=10.0 pmra=-5.743(0.013) pmdec=9.598(0.013) G=13.593 BP=13.971 RP=13.034 No "outburst" in ASAS-3. ASAS-SN data suggest 5-d period during the current brightening. This reminds me of ASASSN-21gk and ASASSN-20da, which may represent a new type of variable stars (ATel 14593).

1 0

2024

2023

2022

2021

vsnet-alert October 2021