spectro-aras.com

Hi Ernst, Just one question: Who is the lucky observer having had constantly good weather during the last 30 days? Seriously, hard to tell. I found the data shown here starts at 15. July 2017 until today (see my last comment on this). I assume, it is expected, that according to our discussion, the b...

Hi Ernst, What, if we would assume that the B star does have its own disk, beside the accretion disk? We would have in that case a superposition of two objects with emission activity. An accretion emission activity (fed by mass flow/wind from the M star) and additionally an emission activity coming ...

Hi Robin,

I will take Altair into account. Sound reasonable. Appreciate your thoughts about this.

Thilo

Hi Peter, As for the ATIK link Robin posted before ( https://www.atik-cameras.com/news/difference-between-ccd-cmos-sensors/ ), I'm also interested in the statement of 'Variations in linearity and sensitivity between pixels' for CMOS. Speaking for DSLR: In general check for non-linearity once to clar...

Hi Ernst, Before we start discussion about what might be the case taken out of observations, I would like to step back and ask, how to observe. Everything counts. My personal opinion and feeling is, that we may learn a lot, especially with this occultation. My concerns are about how to find a good c...

Just for amusement: Do you know, what is really wrong with CMOS detectors and spectrographs? Ok. Send out mail for order of new calibration lamps to France and also call for proposal to two resellers here in Germany for the ASI camera on the same day I ordered a new A/C compressor and fan clutch for...

Hi Hugh, not to be misunderstood: I really want to encourage you, to have a closer look onto your data and existing calibration! Probably, you should present an amplified plot of what is going on with your spectra in details in the blue part of your spectra. Just to gain impression what might be wor...

Just came back to this discussion, which seems a bit old, bit still up-to-date, when it comes to current observations of the ongoing occultation. Yes, Olivier, I prefer a calibration star, which is very well known and flux calibrated, esp. when it comes to the question how to calibrate, what's going...

Hi Olivier, But all ATIK CCD are all with 16 bits CAN : https://3ainmfntxe31vi9qd1pxgpd1-wpengine.netdna-ssl.com/wp-content/uploads/2017/02/Atik-Specifications-Tables-Feb-17.pdf This is true for the CCDs, except the Atik CMOS camera linked by Robin. This is announced to have just 12 Bit, like the AS...

...Donc faire binning 2x2 ne permet pas de gagner en détectabilité. That's right. Reason is given here: http://www.astroinformatics.de/images/stories/pdf/iadis-informatics-2010.pdf CMOS without doubt is the future of imaging. And it is also Sony, who already announced to no longer develop CCDs. Cur...