[vsnet-alert 22211] Re: SDSSJ141118.31+481257.6: superhump period

[roberto nesci]

Dear Tonny, I made again the photometry of the G channel (the best one) with 
IRAF/apphot, getting basically the same result. I used 9 stars in the field from 
UCAC4 and the error bars are the rms deviations of the comparison stars from the 
fitting line (instrumental vs catalog mag): The slope of the fit is 1.00 within 
2% for all my 14 images, as expected for an ideal linear detector.
I see that Geoff Stone got something similar to mine about the amplitude of the 
variability.
Hope it helps to understand what's happening
best regards
Roberto


-- 
prof. Roberto Nesci,  associated to Istituto Nazionale di Astrofisica,
(National Institute of Astrophysics) INAF-IAPS, via Fosso del Cavaliere 100, 
00133 Roma, Italia