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

[vsnet-alert 26283] ZTF21aceejop: another CV candidate? (g = 15.7, r = 16.0)
by Kenta TAGUCHI 01 Oct '21

01 Oct '21

Dear friends, Using my private system scraping MARS ( https://mars.lco.global ), I've just found ZTF21aceejop out as a CV candidate from the public ZTF data. Its amplitude is > ~ 6.0 mag (assuming the limiting mag of PS1-g is 21.6). (I'm sorry if someone has already discovered and reported it elsewhere.) Lasair: https://lasair.roe.ac.uk/object/ZTF21aceejop (The page has not existed now) ALeRCE: https://alerce.online/object/ZTF21aceejop MARS: https://mars.lco.global/?objectId=ZTF21aceejop According to ALeRCE, the position is (RA, Dec) = (07:45:50.452, +56:15:28.07) The result of ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/25c2fb07-72d2-457b-8cc7-a4560… It also confirms the present outburst. It looks there are no past outbursts recorded. Last non-detection by ZTF: r > 19.7033 on 2021-09-26.51 (ZTF, 'difference mag' via ALeRCE) First detections by ASAS-SN: g = 15.422 on 2021-09-29.5728358 g = 15.508 on 2021-09-29.5740966 g = 15.444 on 2021-09-29.5753592 First detections by ZTF: g = 15.665 +/- 0.029 on 2021-09-30.47 (ZTF, 'difference mag' via ALeRCE) r = 15.974 +/- 0.028 on 2021-09-30.50 (ZTF, 'difference mag' via ALeRCE) The object is ~ 2'' north of WISEA J074550.52+561525.6, which is r = 21.2 according to the PS1 mean object catalog. No known minor planets are found by the Minor Planet Checker ( https://www.minorplanetcenter.net/cgi-bin/checkmp.cgi ). Best Regards and Clear Skies, Kenta -- ________________________________________________________________ 田口健太　(TAGUCHI, Kenta) 京都大学大学院理学研究科宇宙物理学教室 (Department of Astronomy, Graduate School of Science, Kyoto University) kentagch(a)kusastro.kyoto-u.ac.jp <mailto:kentagch@kusastro.kyoto-u.ac.jp> 09090536980

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[vsnet-alert 26282] MASTER OT J070314.79+202133.9 outburst
by Taichi Kato 30 Sep '21

30 Sep '21

MASTER OT J070314.79+202133.9 outburst http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21eij/ Gaia21eij AT2020aayl 2021-09-17 19:11:12 105.81191 20.35932 15.37 18.23 1.50 unknown 2021-09-29 07:53:17 4 mag blue outburst on a Gaia source, previous outbursts in lightcurve, candidate CV Precursor and superoutburst in 2020 Nov.-Dec. in ZTF data.

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[vsnet-alert 26281] Gaia21eik: likely SU UMa star
by Taichi Kato 30 Sep '21

30 Sep '21

Gaia21eik: likely SU UMa star http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21eik/ Gaia21eik AT2021zxz 2021-09-17 18:25:11 54.66502 53.85891 18.43 19.50 0.32 unknown 2021-09-29 07:55:11 Outburst in Gaia source, previous outburst in lightcurve Likely superoutburst in 2019 Oct.-Nov. Probably in combined magnitude in ZTF data.

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[vsnet-alert 26280] MASTER OT J055845.55+391533.4 superoutburst
by Taichi Kato 30 Sep '21

30 Sep '21

MASTER OT J055845.55+391533.4 superoutburst ZTF light curves of past superoutbursts have complex profiles. May not be an ordinary SU UMa star. YYYYMMDD(UT) mag observer 20210828.8465 <142c (Yutaka Maeda) 20210829.8457 <146c (Yutaka Maeda) 20210830.8308 <162c (Yutaka Maeda) 20210831.8157 <156c (Yutaka Maeda) 20210909.7884 146:cG (Yutaka Maeda) 20210911.1820 14.20cG (Masao Funada) 20210918.7888 <162c (Yutaka Maeda) 20210919.8442 <159c (Yutaka Maeda) 20210922.7850 <152c (Yutaka Maeda) 20210923.7868 153c (Yutaka Maeda) 20210924.7913 153:c (Yutaka Maeda) 20210926.069 15.14C (Gary Poyner) 20210926.0696 15.13C (Masao Funada) 20210927.7853 151cG (Yutaka Maeda)

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[vsnet-alert 26279] SDSS J203501.46-001946.1 outburst
by Taichi Kato 30 Sep '21

30 Sep '21

SDSS J203501.46-001946.1 outburst Subtype unknown. Somewhat looks like an SU UMa star in ZTF data. YYYYMMDD(UT) mag observer 20210907.2488 17.831zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.3393 17.696zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210911.3211 17.875zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210927.2251 15.424zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210929.1714 15.677zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210929.2145 15.641zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26278] CRTS J210820.6-134909 outburst
by Taichi Kato 30 Sep '21

30 Sep '21

CRTS J210820.6-134909 outburst AM CVn star suspected. YYYYMMDD(UT) mag observer 20210929.2474 17.421zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26277] ASASSN-15qr possible superoutburst
by Taichi Kato 30 Sep '21

30 Sep '21

ASASSN-15qr possible superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20210929.1733 15.932zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26276] ASASSN-15jq possible superoutburst
by Taichi Kato 30 Sep '21

30 Sep '21

ASASSN-15jq possible superoutburst Suspected type from ZTF data. YYYYMMDD(UT) mag observer 20210905.2505 19.893zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2507 19.893zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.3393 19.235zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210911.3211 19.577zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210915.2090 <170C (Masao Funada) 20210916.2554 19.933zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210927.2251 16.345zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210929.1714 16.523zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210929.2145 16.593zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26275] ASASSN-16gr outburst
by Taichi Kato 30 Sep '21

30 Sep '21

ASASSN-16gr outburst Subtype unknown. Bright outburst. YYYYMMDD(UT) mag observer 20210820.4678 <147c (Yutaka Maeda) 20210827.4723 <138c (Yutaka Maeda) 20210828.4531 <148c (Yutaka Maeda) 20210927.2318 15.567zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210929.1719 15.775zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26274] AHTS-2020-001 possible superoutburst
by Taichi Kato 30 Sep '21

30 Sep '21

AHTS-2020-001 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20210926.1756 16.511zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210928.1909 16.947zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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