ASASSN-15bp

[Peter Somogyi]

Foggy weather, 3 hours exposure (overweighted the last 1 hour where had much better SNR).
This is the first real test of the new ATIK 414EXM:

Slit a bit shifted (quick setup), guided on a different star:

_asasn15bp_X2_psomogyi.png (116.06 KiB) Viewed 4846 times

I had lots of trouble with calibrating the ATIK 414 images, had to bin a few columns (make an average of a few neighbour positions) that was only the way I coould fix those few variable columns to get rid of some artifacts (resolved by programming work).
I will summarize these later.

[Robin Leadbeater]

Hi Peter,

I think I would be returning the camera to ATIK if the CCD had several column defects.

I am also interested in the quality of the flat in terms of ripples (fringes) in the spectral response of the ICX825 CCD. They are very weak with my ATK314L+ (ICX285) but are seen in low resolution spectra with cameras using the ICX694 sensor.

Cheers
Robin

[Peter Somogyi]

Robin,

I've created new topic on 414EXM now and put there some material.

[Francois Teyssier]

Very nice spectrum of a cv in outburst, Peter
What was the mag of the object when you got the spectrum ?
François

[Peter Somogyi]

Francois, not much data in aavso yet, looking at more days LCG generator it must have fallen quickly towards 12.8 mag.
I expect more data should be available soon by local variable observers.