SecondLight 383L+: NGC2174 - Monkey Head Nebula

[Max]

Hi all

Here is the second light with the ATIK 383L+.
Big problem is the dew...

Lights_NGC7174
2011-12-28 L R G B (1x1)
L:     5 x 10min / Master: NGC2174_008LUM.fit
R:    5 x 10min / Master: NGC2174_008RED.fit
G:    5 x 10min / Master: NGC2174_008GREEN.fit
B:    5 x 10min / Master: NGC2174_008BLUE.fit
Sum:   20 x 10min = 200min

Flats (10x)
2011-12-27
L:    2s
R:    4s   
G:   4s   
B:   4s
SimpleMean - WithBias

Darks (10x)
2011-12-25

Bias (10x)
2011-12-25

DataRejection
LUM: PoissonSigmaReject-2,1-2,325 (NGC2174_007LUM.fit)
RED: PoissonSigmaReject-2,1-5
GREEN: PoissonSigmaReject-2,1-5,125
BLUE: PoissonSigmaReject-2,1-4,875

Version:
v0 -> Mean
v1 -> Mean_Align
v2 -> Mean_Align_Decon-10-4-8-1x50 (only Lum)

Setup:
Master:
EQ-6
GSO-RC8 + AP0.67(85.5+16)mm->f5,3 + Atik OAG + Lodstar +  Atik-EFW2-1 + Atik383L+
CCD: -30°C
focus with Bahtinov mask
Integration time: 0,5s
Seeing: very good / good
temp: -7°C / -8°C
SQM: 21.2 / 22.2 (dew?)
Dew: very bad, ice on the main mirror

Wheel:
1) LUm
2) R
3) G
4) B
5) Ha7nm
6) SII8nm
7) OIII8,5nm
8) Hb8,5nm
9) ClearGlas

Workflow in CCDStack (fast work flow):
calibrate (darks, flats, biases)
reject hot/cold pixels: 1 / 70000
interpolate rejected pixels: 1 / 2
Registration
Normalization: Both
Data Reject: PoissonSigmaReject
combine: Mean
Align
Deconvolve 10-4-8 1x50
color
DDP and back ground adjustment with the sliders
Thats all (Fast work flow)

ToDo
Better collimation for RC8 or go to f6
Adjust the prism of the OAG (extra spike...)

Thanks
Max

[Lex]

Max,,

absolutely gorgeous! Really nice work!

Best

Lex

[bwa]

Some great data!  But it looks like there is still some nebulosity in the background wanting to be seen?

bwa

[Max]

Hi Lex and bwa

Thank you!

Yes, there is still a lot of nebulosity in the background. Sorry for the fast work flow - it seems it was too fast...

Thanks
Max

[PAB64]

That really is nice