ASASSN-14cl New large-amplitude cataclysmic variable

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
回覆文章
PTS
夸克星
文章: 5849
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

ASASSN-14cl New large-amplitude cataclysmic variable

文章 PTS » 週一 23 6月, 2014 08:26

AAVSO Special Notice #386

ASASSN-14cl New large-amplitude cataclysmic variable

June 20, 2014


Kris Z. Stanek (The Ohio State University) et al. reported the discovery during the ongoing All-Sky Automated Survey for SuperNovae
(ASAS-SN) of a bright transient (10.66V) on 2014 June 14.52 UT.
Data were obtained using the quadruple 14-cm "Brutus" telescope in Haleakala, HI (hosted by Las Cumbres Observatory Global Telescope Network).(ATel #6233, http://www.astronomerstelegram.org/?read=6233)

Stanek et al. also report that the object is identified with SDSS
J215457.68+264112.7 (g=18.8, r=18.7), which is also designated
USNO-B1.0 1166-0570046. The amplitude indicates the object may be a WZ Sge-type cataclysmic variable.

Coordinates: R.A. 21 54 57.70 Dec. +26 41 13.0 (2000.0)

Spectroscopy by Francois Teyssier (ARAS; Rouen, France) obtained on June 15.0 UT and reported in ATel #6235
(http://www.astronomerstelegram.org/?read=6235) shows that ASASSN-14cl is a dwarf nova in outburst. Spectra may be downloaded via the Astronomical Ring for Access to Spectroscopy (ARAS) site at http://www.astrosurf.com/aras/Aras_Data ... yssier.fit

Observations by Arto Oksanen (Muurame, Finland) and Colin Littlefield (South Bend, IN) show <0.1-magnitude amplitude variations, which may be related to early superhump formation.
Nick James (Chelmsford, England) reports a possible superhump period from his observations made around June 19.0804 UT that is different from earlier values published but indicates the difference may be due to insufficient data on his part.

11 observers have contributed over 4,000 B/V/TB/TG and visual observations to the AAVSO International Database to date. The earliest observations reported to the AAVSO include:
2014 June 13.5 UT, <16.2 V (ASASSN);
14.91180, 10.5 visual (W. Kriebel, Schierling/Walkenstetten, Germany); 15.059, 10.6 visual (P. Schmeer, Bischmisheim, Germany); 15.18567, 10.702 V +/-0.004 (A. Oksanen, Muurame, Finland); 15.18653, 10.664 V +/-0.004 (Oksanen);

The most recent observations are:
2014 June 18.90760, 11.8 visual (Kriebel); 18.99306, 11.9 visual (K. Wenzel, Grossostheim, Germany); 20.25970, 11.9 visual (M. Komorous, London, ONT, Canada);

Finder charts with a sequence may be created using the AAVSO Variable Star Plotter (http://www.aavso.org/vsp).

A new sequence has been posted for this object. Observers who have already submitted data should check their data to see if they need to re-reduce their photometry.

Please report observations to the AAVSO International Database using the name ASASSN-14cl.

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.

------------------------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notifi ... ialnotices

-----------------------------------------------
Please support the AAVSO and its mission -- Join or contribute to the ANNUAL CAMPAIGN today: http://www.aavso.org/apps/donate

回覆文章

回到「業餘天文研究專區 Amateur Astronomers' Research Area」

誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 1 位訪客