[vsnet-alert 22208] Re: SDSSJ141118.31+481257.6: superhump period

Mon Jun 4 22:53:34 JST 2018

Hi Roberto,

That's a very weird finding. I observed SDSS J141118.31+481257.6 for
several hours at high cadence (30s exposures) last night using a 0.40-m
f/5.1 telescope at CBA Extremadura Observatory and the object was showing
prominent superhumps with an amplitude of close to 0.3 mag. My session
overlaps with your run, so it will be interesting to see how you get to a
"no variation >0.05 mag" statement. I will publish my lightcurve later
tonight.

Best regards
Tonny

Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com
www.peranso.com

On Mon, Jun 4, 2018 at 12:20 PM, roberto nesci <Roberto.Nesci at iaps.inaf.it>
wrote:

> I observed the star on June 3 2018 with the 30cm telescope of Foligno
> (K56) equipped with a Canon 550D, from 21:08:51 to 21:56:07 (48 minutes),
> corresponding to about one period. Comparison stars were the AAVSO #111 and
> #127 and aperture photometry was made with the photometry tool of MaximDl.
> The star was substantially brighter than the on June 1/2, average values
> being B=13.13; V=13.26.
> No variations larger than 0.05 mag with respect to the average level were
> detected in any of the three BVR bands.
>
> Roberto Nesci
> --
> prof. Roberto Nesci,  associated to Istituto Nazionale di Astrofisica,
> (National Institute of Astrophysics) INAF-IAPS, via Fosso del Cavaliere
> 100, 00133 Roma, Italia
>
>

-- 
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com
www.peranso.com