Temperature of Bias and Flats -- CCD Mono

[niteman1946]

Hi Group,

Not sure what the rule is here.  Is it necessary to shoot Bias and Flats at the same temp as the Lights and Darks?  Or, will they (Bias and Flats) work fine with PixInsight at temperatures other than the Lights and Darks?  Currently, I'm keeping all four types at the same temperature, but hot having to do that would ease some of the work.

For additional information, I am not calibrating my Flats and Darks initially.  Just integrating them and then checking calibrate for them at the Light calibration.

My camera is an Atik 383L+ mono.

Thanks for your help,

Mark

[georg.viehoever]

temperature for bias and flat are not critical - since they are short exposure.

[niteman1946]

Thanks Georg,

Good to know.

Mark

[Philippe B.]

For sure, temperature has its importance as a CCD has a different response (noise, uniformity, linearity, noise pattern, cosmetic defaults) when temp is changing.


Bias and dark MUST be at the same temperature than images
Flat can have different temperature but in this case it will be necessary to do bias at same temp to correct the flat.


Ok, if you have 5-10 deg C difference, it is not a problem. But if ther is more, you will need to be more correction.

[Geoff]

Make a master bias at one temperature, then make another one at a different temperature. Subtract one master bias from the other and see if there is any obvious difference.
Geoff

[Alejandro Tombolini]

It does not happens the same with DSRL. Same temperature is perhaps the ideal situation, but I agree that is not critical, (at least in my DSRL images with actual camera). Since I made the SuperBias with 300 bias. I did not repeat it again and use the same SuperBias independently of the light's temperature.

Regards, Alejandro.