29 Jan
2023
29 Jan
'23
11:52 a.m.
Dear colleagues,
TCP J04361641+562824 (aka AT 2023ayf) has been very recently detected by the
XOSS team (see TNS Astronomical Transient Report No. 170114). I have just
finished analysing my unfiltered CCD observations of TCP J04361641+5628241,
obtained on 2023, Jan 28/29 at CBA Extremadura Observatory (Spain) using a
0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies.
The resulting light curve clearly shows the presence of a superhump with an
amplitude of 0.39 mag, establishing TCP J04361641+5628241 as a new SU
UMa-type dwarf nova. An accurate period analysis was not yet possible, due
to the lack of multiple superhumps within the observation window, but it
clearly is an object with a long superhump period. A rough estimate puts it
at 0.095d, but further observations are needed to firmly establish the
superhump period. The object was at mag CV = 14.7 on Jan 28th.
I will send my observations to AAVSO, CBA and VSNET for further analysis.
Best regards
Tonny
---
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
<http://www.cbabelgium.com> http://www.cbabelgium.com
PERANSO: The Light Curve and Period Analysis Software
http://www.peranso.com
31 Jan
31 Jan
8:31 a.m.
New subject: [vsnet-campaign-dn 16898] Re: (cba:chat) TCP J04361641+5628241: new SU UMa-type dwarf nova
Dear colleagues
I have collected further observations of this target over the past 2 nights.
The combined light curve shows several large amplitude superhumps. A period
analysis using the ANOVA, Generalized-Lomb-Scargle, PDM and Conditional
Entropy methods (Peranso 3.0), yields a combined superhump period of 0.0803
+/- 0.0007d. The object is still bright at mag CV = 14.7.
Best regards
Tonny
From: cba-chat <cba-chat-bounces(a)cbastro.org> On Behalf Of
tonny.vanmunster(a)gmail.com
Sent: Sunday, 29 January 2023 04:52
To: cba-chat(a)cbastro.org; 'Kenta TAGUCHI'
<kentagch(a)kusastro.kyoto-u.ac.jp>jp>;
vsnet-alert(a)ooruri.kusastro.kyoto-u.ac.jp; 'Taichi Kato'
<tkato(a)kusastro.kyoto-u.ac.jp>jp>;
vsnet-campaign-dn(a)ooruri.kusastro.kyoto-u.ac.jp;
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<vsnet-outburst(a)ooruri.kusastro.kyoto-u.ac.jp>
Subject: (cba:chat) TCP J04361641+5628241: new SU UMa-type dwarf nova
Dear colleagues,
TCP J04361641+562824 (aka AT 2023ayf) has been very recently detected by the
XOSS team (see TNS Astronomical Transient Report No. 170114). I have just
finished analysing my unfiltered CCD observations of TCP J04361641+5628241,
obtained on 2023, Jan 28/29 at CBA Extremadura Observatory (Spain) using a
0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies.
The resulting light curve clearly shows the presence of a superhump with an
amplitude of 0.39 mag, establishing TCP J04361641+5628241 as a new SU
UMa-type dwarf nova. An accurate period analysis was not yet possible, due
to the lack of multiple superhumps within the observation window, but it
clearly is an object with a long superhump period. A rough estimate puts it
at 0.095d, but further observations are needed to firmly establish the
superhump period. The object was at mag CV = 14.7 on Jan 28th.
I will send my observations to AAVSO, CBA and VSNET for further analysis.
Best regards
Tonny
---
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
<http://www.cbabelgium.com> http://www.cbabelgium.com
PERANSO: The Light Curve and Period Analysis Software
http://www.peranso.com
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days inactive
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vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp
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tonny.vanmunster＠gmail.com