The object LINEAR 23795703 = Gaia DR3 861540207303947776 = P_2.74a
is listed as EW with the range 16.41 - 16.94 CV in the VSX https://www.aavso.org/vsx/index.php?view=detail.top&oid=322585
However, El-Badry et al. (2021) https://ui.adsabs.harvard.edu/abs/2021MNRAS.508.4106E/abstract
identified it as an eclipsing cataclysmic variable (their object P_2.74a)
that showed an outburst in 2015 according to ASAS-SN. El-Badry et al also
present a spectrum and radial velocity curve.
LINEAR 23795703 was found in outburst again on 2025-03-25.8886 UTC having
CV=14.0 +/-0.1 in NMW survey images (135mm f/2.0 telephoto lens + unfiltered ST-8300M CCD).
Best wishes,
Kirill Sokolovsky for the NMW team
EX Hya in outburst (NLDQ(UG)+E)
HYAEX 250310.486 130
HYAEX 250313.469 106
HYAEX 250313.569 106
--
Rod Stubbings
Tetoora Road Observatory
Victoria, Australia
Honorary Associate member Astronomical Society of Australia
Telescope: "Infinity" 22" f/3.8
stubbo(a)dcsi.net.au
http://rodstubbingsobservatory.wordpress.com/
Dear colleagues,
I have just finished analysing my unfiltered CCD observations of TCP
J14034008+7947313, obtained over the past 7 nights between 2025, Feb 28 and
Mar 06 at CBA Belgium Observatory using a 0.40-m f/10.0 telescope and
QHY-268M CMOS camera under clear skies. No superhumps were visible in the
light curves of this object till 2025, Mar 6/7.
The light curve of 2025, Mar 6/7 clearly shows the presence of regular
superhumps with an amplitude of 0.18 mag, establishing TCP J14034008+7947313
as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA,
Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0) yields
a combined superhump period of 0.0586 +/- 0.0003d. The object was at mag CV
= 15.3 on Mar 06th.
Image calibration and photometry were done using Phoranso, which allows to
simultaneously measure other variables present in the FOV of a variable
star.
I will send my observations to AAVSO, CBA and VSNET for further analysis.
With kind regards,
Tonny
---
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
http://www.cbabelgium.co <http://www.cbabelgium.com/> m
PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.co <http://www.peranso.com/> m
PHORANSO: Photometric Reduction and Analysis Software
http://www.phoranso.com <http://www.phoranso.com/>