Abell 1413 from Jan 26; another night of good seeing! Less than 1.7arc secs all night. I really need more subs for this cluster and I should have imaged it with my 10in F8 SCT for the increased focal length. The image is centred on the supermassive elliptical galaxy Abell 1413 BCG (PGC 37477) which is 2.1 billion light years away!
10in SCT at F5 via a Starizona LF SCT reducer, ASI071 MC Pro camera, 49 x 5min ( 4hrs 5mins ) subs, Meade LPI G Advanced guide camera, on a CEM60 mount. All aspects of image acquisition, centring, autofocus and OAG autoguiding, starting with the mount parked, was robotically controlled by Astroart-9 SP3. All processing with AA9 SP3. There was mild a gradient due to moon and dawn illumination which I mostly corrected with a gradient filter.
Processing History:
01:22:37 Flip vertical
01:20:55 Remove gradient adaptive sub. 55
16:01:36 Multiscale Lowpass 50 50 50 90
15:59:52 DDP 90 15 0 50 50 1.37 40
15:59:32 Histogram stretch 65535 3950 13280 0 0
15:59:09 Deconvolution Richardson Lucy 15 2 70 20
15:57:50 Reduce color fringes 13
15:57:30 Align RGB 100 1
(sigma sum stacking plus flats and darks)