[vsnet-outburst 26862] Re: [vsnet-alert 25557] PNV J23244760+6111140: nova eruption of CzeV3217?

Fri Mar 19 05:26:35 JST 2021

All,

I herewith confirm the below eruption, based on B-V-R-I observations obtained this evening (2021, Mar 18) at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies:

2021 03 18.306 UT, B = 9.34 +/- 0.08
2021 03 18.308 UT, B = 9.37 +/- 0.07
2021 03 18.306 UT, V = 8.95 +/- 0.03
2021 03 18.307 UT, V = 8.94 +/- 0.03
2021 03 18.307 UT, R = 8.44 +/- 0.02
2021 03 18.308 UT, R = 8.45 +/- 0.02
2021 03 18.307 UT, I = 8.12 +/- 0.03
2021 03 18.309 UT, I = 8.12 +/- 0.02

Astrometry: RA = 23h24m47.77s, Dec = +61°11'15.0" , J2000.0, Residuals 0.5"

Best regards
Tonny

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Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
http://www.cbabelgium.com

PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.com

-----Original Message-----
From: vsnet-alert <vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp> On Behalf Of Patrick Schmeer pasc1312-aavso at yahoo.de via vsnet-alert
Sent: Thursday, 18 March 2021 17:38
To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; cvnet-outburst at groups.io; baavss-alert at groups.io; spectro-l at groups.io; astronomicalspectroscopy at groups.io
Subject: [vsnet-alert 25557] PNV J23244760+6111140: nova eruption of CzeV3217?

CzeV3217  (EW)
Orbital period: 0.376938 d  (9.0465 h)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=2216132

CzeV3217 20210314.4253 <130C Yuji Nakamura
CzeV3217 20210318.4236   96C Yuji Nakamura

2021 03 18.4236 UT
Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on four frames (15-s exp., limiting mag 12.0) taken by 135mm F4.0 lens + CCD.
Nothing is visible at this location on the frames taken on 2021 Mar. 14.4253 UT (15-s exp., limiting mag 13.0) by same instrument.
The object is located very close to a W UMa-type eclipsing variable star CzeV3217 (Mag. range 14.870 - 14.960 V, AAVSO VSX).
http://www.cbat.eps.harvard.edu/unconf/followups/J23244760+6111140.html

Gaia EDR3 parallax 0.5776 ± 0.0254 mas (distance 1.69 ± 0.07 kpc)

Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data:
https://asas-sn.osu.edu/sky-patrol/coordinate/00745124-4307-4bd9-9d95-d59d5399975e

Confirmation and subsequent spectroscopy, multiband photometry etc. are urgently required.

Clear skies,
Patrick