CVnet - Cataclysmic Variables Network


TCP J20210770+2914093: Galactic nova in Vulpecula

From vsnet-outburst 27481 (Naoto Kojiguchi, 16 July 2021)

TCP J20210770+2914093

 Large outburst amplitudes of 9 mag .

TCP J20210770+2914093   2021 07 16.4919*  20 21 07.70 +29 14 09.3  12.0 U             
Vul       I 0

2021 07 16.54490
F. Watanabe (Nayoro Observatory, Nayoro, Japan) performed a follow-up observation for this transient using a 0.4-m f/10 Meili telescope (Meade LX200-40ACF) + R-filtered CCD (SBIG STL-1001E) on Jul. 16.545 UT. The magnitude is measured to be R = 11.8 +/- 0.1 (reference stars from UCAC4 Rmag) and the position end figures are given as 7s.67, 10”.0.

2021 7 16.5647
Photometry results were B=13.13, V=12.28, Rc=11.68 and Ic=11.15 with 0.25m (F6.3) SCT + QSI632 CCD. My image is available at http://meineko.sakura.ne.jp/ccd/TCP_J20210770+2914093.jpg Seiichiro Kiyota, Kamagaya, Japan

ASAS-SN Sky Patrol:
https://asas-sn.osu.edu/sky-patrol/coordinate/ebdc551a-b9d1-4e0b-a27c-c2f32b14699e

IDs:
202107.704 +291409.091  Gaia_DR3_1861166838700691968 Plx=--(--) PM=-- pmRA=--(--) pmDE=--(--) G=21.045(0.023) BP-RP=0.772619
202107.703 +291409.108 PS1_143083052821573655 g=21.8509(0.0368) r=21.2930(0.0457) i=21.1342(0.0387) z=20.7171(0.0232)
202107.7092 +291409.092 SDSSJ202107.70+291409.0 u=24.268(1.375) g=22.271(0.121) r=21.684(0.101) i=21.387(0.126) z=21.325(0.418)

Nova confirmation reported on ATel 14793


V1674 Herculis: bright and extremely fast nova!
Spectroscopy and photometry (V band etc.) required!





ASASSN-21gk: new transient (mag. 13) in Sagittarius
Spectroscopy and photometry required!





 
Nova in Cassiopeia: 
V1405 Cassiopeiae Nova Cassiopeiae 2021
= PNV J23244760+6111140 = CzeV3217 (19 March 2021)

Spectroscopy and photometry requested for SS Cygni (17 February 2021)






It’s all about the  standstills, those episodes where the star gets stuck at a mid-point between maximum and minimum. If it doesn’t exhibit standstills it isn’t a Z Cam star.










Data from Catalina Real Time Survey 

Drake et al. 2009, ApJ, 696, 87




Northern CVs brighter than 17th magnitude here.

Southern CV's brighter than 17th magnitude here.



ACTIVITY AT A GLANCE

Last updated 06:45 UT on 24 July 2021
 
(All objects mentioned in this section are in the International Variable Star Index; additionally, VSX links have been given for selected cataclysmic variables) 

New outbursts and unusual activity reported in the last 72 hours

YYYYMMDD

20210722
RU Peg
KT Per
VW Vul


Current superoutbursts (since ...)
TCP J00505644+5351524 # (20210717, precursor 0713, time-resolved photometry is required)
V627 Peg # (20210715, UGWZ, time-resolved photometry is required)
...
ASASSN-21ha # (20210502, UGWZ, double superoutburst, six rebrightenings up to now)


Z Cam-type dwarf novae at standstill
ST Cha (since ~20210309, IW And star)
SS Cyg # (since 20210203, SS Cygni dwarf nova prototype)
AT Cnc (since 20210116)
Z Cam (since 20181012)
IM Eri (20201130–20210115; IW And star)
BO Cet (20210108–20210209)
ST Cha (20201205–20201227; IW And star)


# indicates a noteworthy or unusual outburst
:  indicates confirmation required
 
'Activity at a Glance' is gleaned from observations reported to AAVSO MyNewsFlash, BAAVSS-Alert, CVnet-Outburst, VSObs-share and VSNET-outburst. We sincerely thank all the observers who contribute timely observations and reports of activity to these email lists.

RECENT PAPERS ON CVs

Updated July 19th, 2021

For new papers on CV's see arxiv.org astro-ph



A. Álvarez-Hernández (1,2), M. A. P. Torres (1,2), P. Rodríguez-Gil (1,2), T. Shahbaz (1,2), G. C. Anupama (3), K. D. Gazeas (4), M. Pavana (3,5), A. Raj (6), P. Hakala (7), G. Stone (8), S. Gomez (9), P. G. Jonker (10,11), J.-J. Ren (12), G. Cannizzaro (10,11), I. Pastor-Marazuela (13,14), W. Goff (15), J. M. Corral-Santana (16), R. Sabo (17) ((1) Instituto de Astrofísica de Canarias, (2) Departamento de Astrofísica, Universidad de La Laguna, (3) Indian Institute of Astrophysics, (4) Section of Astrophysics, Astronomy and Mechanics, Department of Physics, National and Kapodistrian University of Athens, (5) Department of Physics, Pondicherry University, (6) Dept. of Physics & Astrophysics, University Road, University Enclave, (7) Finnish Centre for Astronomy with ESO (FINCA), Quantum, University of Turku, (8) First Light Observatory Systems, (9) Center for Astrophysics | Harvard & Smithsonian, (10) SRON, Netherlands Institute for Space Research, (11) Department of Astrophysics / IMAPP, Radboud University, (12) CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, (13) Anton Pannekoek Institute, University of Amsterdam, (14) ASTRON, the Netherlands Institute for Radio Astronomy, (15) American Association of Variable Star Observers, (16) European Southern Observatory, (17) American Association of Variable Star Observers)

Paula Szkody, Clair Olde Loohuis, Brad Kiplitz, Jan van Roestel, Brooke Dicenzo, Anna Y. Q. Ho, Lynne A. Hillenbrand, Eric C. Bellm, Richard DeKany, Andrew J. Drake, Dmitry A. Duev, Matthew J. Graham, Mansi M. Kasliwal, Ashish A. Mahabal, Frank J. Masci, James D. Neill, Reed Riddle, Benjamin Rushholme, Jesper Sollerman, Richard Walters

Taichi Kato, Naoto Kojiguchi (Kyoto U)

J. F. Wild, S. P. Littlefair, R. P. Ashley, E. Breedt, A. Brown, V. S. Dhillon, M. J. Dyer, M. J. Green, P. Kerry, T. R. Marsh, S. G. Parsons, D. I. Sahman

J. van Roestel, T. Kupfer, M.J. Green, S. Wong, L. Bildsten, K. Burdge, T. Prince, T.R. Marsh, P. Szkody, C. Fremling, M.J. Graham, V.S. Dhillon, S.P. Littlefair, E.C. Bellm, M. Coughlin, D.A. Duev, D.A. Goldstein, R.R. Laher, B. Rusholme, R. Riddle, R. Dekany, S.R. Kulkarni

Mariko Kimura, Shinya Yamada, Nozomi Nakaniwa, Yoshihiro Makita, Hitoshi Negoro, Megumi Shidatsu, Taichi Kato, Teruaki Enoto, Keisuke Isogai, Tatehiro Mihara, Hidehiko Akazawa, Keith C. Gendreau, Franz-Josef Hambsch, Pavol A. Dubovsky, Igor Kudzej, Kiyoshi Kasai, Tamás Tordai, Elena Pavlenko, Aleksei A. Sosnovskij, Julia V. Babina, Oksana I. Antonyuk, Hiroshi Itoh, Hiroyuki Maehara


Yusuke Tampo, Keisuke Isogai, Naoto Kojiguchi, Hiroyuki Maehara, Kenta Taguchi, Taichi Kato, Mariko Kimura, Yasuyuki Wakamatsu, Masaaki Shibata, Daisaku Nogami, Miho Kawabata, Keiichi Maeda, Kosuke Namekata, Soshi Okamoto, Masaaki Otsuka, Burgaz Umut, Shumpei Nagoshi, Hiroshi Itoh, Tonny Vanmunster, Tamas Tordai, Geoffrey Stone, Katsura Matsumoto, Daiti Fujii, Ryota Matsumura, Momoka Nakagawa, Nodoka Takeuchi, Yuki Zenkou, Elena P. Pavlenko, Kirill A. Antonyuk, Nikolaj V. Pit, Oksana I. Antonyuk, Julia V. Babina, Aleksei V. Baklanov, Aleksei A. Sosnovskij, Sergey Yu. Shugarov, Nataly Katysheva, Drahomir Chochol, Shawn Dvorak, Pavol A. Dubovsky, Tomas Medulka, Igor Kudzej, Seiichiro Kiyota, Alexandra M. Zubareva, Alexandr A. Belinski, Natalia P. Ikonnikova, Marina A. Burlak, Yasuo Sano, Masanori Mizutani, Javier Ruiz, Roger D.pickard, Franz-josef, Hambsch, Sjoerd Dufoer, Stephen M. Brincat, Charles Galdies, Kenneth Menzies, Masayuki Moriyama, Mitsutaka Hiraga, Yutaka Maeda, Kenji Hirosawa, Masao Funada, Minoru Yamamoto




Sergei V. Antipin, Alexandra M. Zubareva, Aleksandr A. Belinski, Marina A. Burlak, Natalia P. Ikonnikova, Konstantin L. Malanchev, Matwey V. Kornilov, Egor O. Mishin

Krystian Ilkiewicz, Simone Scaringi, James M.C. Court, Thomas J. Maccarone, Diego Altamirano, Corey W. Bradshaw, Nathalie Degenaar, Matteo Fratta, Colin Littlefield, Tariq Shahbaz, Rudy Wijnands

Joseph Patterson (1), Jonathan Kemp (2), Berto Monard (3), Gordon Myers (3), Enrique de Miguel (4), Franz-Josef Hambsch (3), Paul Warhurst (5), Robert Rea (3), Shawn Dvorak (3), Kenneth Menzies (3), Tonny Vanmunster (3), George Roberts (3), Tut Campbell (3), Donn Starkey (3), Joseph Ulowetz (3), John Rock (3), Jim Seargeant (3), James Boardman (3), Damien Lemay (3), David Cejudo (3) ((1) Columbia Univ., (2) Middlebury Coll., (3) Center for Backyard Astrophysics, (4) Univ. de Huelva, (5) Univ. of Auckland)












Comments