January 2022 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26505] TV Crv superhumps
by Taichi Kato 05 Jan '22

05 Jan '22

TV Crv superhumps Itoh-san detected superhumps.

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[vsnet-alert 26504] ASASSN-19za possible superoutburst
by Taichi Kato 04 Jan '22

04 Jan '22

ASASSN-19za possible superoutburst Gaia22aau AT2019slj 2022-01-01 15:22:10 350.07709 49.32948 15.14 18.99 0.72 CV 2022-01-03 14:16:29 ~5 mag outburst in confirmed CV ASASSN-19za, spectrum on TNS http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22aau/ Observations on two nights during the 2019 superoutbursts.

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[vsnet-alert 26502] MASTER OT J042609.34+354144.8 bright outburst
by Denis Denisenko 03 Jan '22

03 Jan '22

This SU UMa type dwarf nova in Perseus is in outburst on the latest image from Open University's COAST telescope installed on Teide, Tenerife. COAST Mark III is 0.42-m f/6.8 CDK17 Dall-Kirkham with FLI ProLine KAF-09000 CCD. MASTER OT J042609.34+354144.8 20211122.3276 16.38r ZTF Lasair 20211212.9034 16.12CV COAST 20211213.4163 16.30o ATLAS (Tonry et al.) 20211221.5314 16.15o ATLAS 20211223.5042 15.84o ATLAS 20211225.3864 16.28o ATLAS 20211226.3844 16.50o ATLAS last observartion before outburst 20211227.9386 15.93CV COAST 20220103.0572 13.29CV COAST Outburst! ZTF Lasair real-time data https://lasair.roe.ac.uk/object/ZTF17aabuvss/ has not been updated since 2021 Nov. 22 (MJD=59540). The light curve from Zwicky Transient Facility (Masci et al., 2019) Data Release 8: http://scan.sai.msu.ru/~denis/J0426+3541-ZTF-DR8-LC.gif Light curve from ATLAS forced photometry server (Tonry et al., 2018): http://scan.sai.msu.ru/~denis/J0426+3541-ATLAS-LC.gif Note the long-term variations of the quiescent level. Fourth body in the system? Third body is apparently too far away (16.6" at 186 pc is about 3000 AU, or 100x Sun-Neptune distance) to cause perturbations on a few years time scale. Denis Denisenko

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[vsnet-alert 26500] TV Crv superoutburst (since Dec. 29)
by Patrick Schmeer 03 Jan '22

03 Jan '22

TV Corvi (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=10699 From "activity at a glance (Jan 02)" (Taichi Kato, vsnet-outburst 28168): 20211229.671 132 (Rod Stubbings) 20211230.1675 13.37C (Masao Funada) 20211230.669 134 (Rod Stubbings) 20211231.3199 13.52C (Masao Funada) The current superoutburst started between 2021 December 24 and 29 according to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data: https://asas-sn.osu.edu/sky-patrol/coordinate/80b95890-7fe5-4e17-80aa-85d9b… Normal outbursts were observed from 2021 February 16 to 18 and from July 5 to 7. Time-resolved photometry is encouraged. Clear skies, Patrick

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[vsnet-alert 26499] EF Peg likely superoutburst (since Dec. 30)
by Patrick Schmeer 03 Jan '22

03 Jan '22

EG Pegasi (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=25272 From "activity at a glance (Jan 02)" (Taichi Kato, vsnet-outburst 28168): 20211220.412 <130 (Tsuneo Horie) 20211221.415 <130 (Tsuneo Horie) 20211222.4465 <158c (Yutaka Maeda) 20211223.4439 <151c (Yutaka Maeda) 20211226.410 <130 (Tsuneo Horie) 20211227.417 <130 (Tsuneo Horie) 20211228.372 <130 (Tsuneo Horie) 20211230.410 116 (Tsuneo Horie) 20211231.406 112 (Tsuneo Horie) 20211231.4368 113cG (Yutaka Maeda) 20220101.4006 11.40C (Masayuki Moriyama) Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data (contaminated): https://asas-sn.osu.edu/sky-patrol/coordinate/7d4a7099-69dc-44f3-b85d-0f4e9… Time-resolved photometry is encouraged (note: 12.6 mag. companion 5" to the SE). Clear skies, Patrick

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[vsnet-alert 26498] CRTS J045446.8-181214 (super?)outburst (since Dec. 29)
by Patrick Schmeer 03 Jan '22

03 Jan '22

CRTS J045446.8-181214 (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=298372 Grzegorz Duszanowicz reports that SSS 130317:045447-181214 is bright (mag. 14.6). According to ASAS-SN Sky Patrol data the outburst started on 2021 December 28 or 29: https://asas-sn.osu.edu/sky-patrol/coordinate/a51092ff-2b3c-45d0-8d88-09d64… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18achtaah/ Time-resolved photometry is encouraged. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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vsnet-alert January 2022