AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.
I agreeImaging telescope or lens:TS Optics APO130f6
Imaging camera:ZWO ASI1600MM-Cool
Mount:Ioptron CEM 120 EC2
Guiding telescope or lens:TS Optics APO130f6
Guiding camera:Starlight Express Lodestar X2 Autoguider
Focal reducer:TS-Optics TSFlat 2
Software:Sequence Generator Pro, PixInsight , PHD Guiding 2.5.0
Filters:AstroDon 5nm Ha filter, ZWO new B, ZWO new G, ZWO new R, ZWO new L
Accessories:ZWO EFW 31mm 8 positions, QHYCCD PoleMaster, Innovations Foresight ONAG, USB_Focus V3 Usb Focus, USB Stepper Motor Heavy Load
Resolution: 4651x3474
Dates:April 29, 2019
Frames:
AstroDon 5nm Ha filter: 4x600" -18C bin 1x1
ZWO new B: 10x120" -18C bin 1x1
ZWO new G: 10x120" -18C bin 1x1
ZWO new L: 30x120" -18C bin 1x1
ZWO new R: 10x120" -18C bin 1x1
Integration: 2.7 hours
Avg. Moon age: 24.43 days
Avg. Moon phase: 26.64%
Mean SQM: 21.20
Mean FWHM: 3.10
Temperature: 10.00
Astrometry.net job: 2719120
RA center: 190.698 degrees
DEC center: 32.343 degrees
Pixel scale: 0.912 arcsec/pixel
Orientation: 348.281 degrees
Field radius: 0.735 degrees
Locations: Duc, Prayssas, Lot et Garonne, France
Data source: Backyard
During this imaging session I did my first automated merian flip !!!!
It was an "attended" meridian flip, I was able to check that all was going very very well :
- At 0h11 (30 april) light frame n°24 ended and initiated the MF
- SGP performed a plate solve for "sync" current coordinates
- Mount move from W to E side of pier (PHD2 idsconneted at the same time)
- SGP performed Centering routine (in the Target Offset mode) and after 3 iterations obtained less than 5 pixels total error (5 arcsec).
- SGP relauch PHD2 in (my multi star) autoselect and stabilize guiding
- SGP performed auto focus routine (which pause guiding)
- At 0h17 : SGP initiate Light frame n°25
The total MF duration was 6 minutes.
Original image is LRGB without Ha.
I selected gain 0 (5e- / ADU) by mistake especially for the Ha frames which were RON dominated.
The processing was done in PI as follow (version original):
For each L, R ,G ,B and Ha channels :
- Flat Field Dark Substraction
- Flat Field Integration
- Images Calibration (Dark Substraction and FF correction)
- Cosmetic Correction
- Image Registration
- Image Integration
- DBE or ABE
- Deconvolution masked with 2.3 pixel psf
- TGV denoise for Light frame only
Then :
- Creating RGB image from RGB channels
- Color balance and Color saturation on stars of RGB
- Nonlinear Image Creation with L and RGB and Ha
- Extract R, g, b channels from RGB
- Created LRGB color image
- Add Ha to R in NL mode
- Created LRGBHa image
- Use clone stamp to clean some red artefacts coming from Ha channel adding
Final image adjustments performed in Iphoto on Imac (levels adjustments, +10% color sat, crop and deflip)
Comments