10in SCT at F8 via a Starizona LF SCT reducer, ASI071 MC Pro camera, 48 x 5min ( 4hrs ) subs, ASI178 MM guide camera, on a CEM120 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.
This is an interesting cluster due to "... Ambartsumian’s knot (a dwarf galaxy at the end of the banjo like tidal feature associated with NGC 3561A, also known as Arp 105). This feature is also known as the Guitar."
Processing History
14:02:02 Flip horizontal
14:01:55 Remove gradient adaptive sub. 95
14:00:21 Multiscale Lowpass 0 50 50 90
13:58:33 DDP 90 15 0 50 50 0 0
13:55:52 Histogram stretch 65535 1726 9378 0 0
13:54:57 Deconvolution Richardson Lucy 20 2 70 20
13:53:23 Convolution
13:52:41 Reduce color fringes 11
13:51:52 Align RGB 100 1
(sigma sum stacking plus flats and darks)
