Wednesday, 17 January 2018

B33. The Horeshead nebula.

B33. The Horeshead nebula. This image was taken under clear light-polluted sky conditions with stars visable down to magnitude 5. I was using my ten inch f/4.8 reflector, a Vixen Atlux mount, P.H.D. auto-guiding , an Atik 383L mono CCD camera and a set of Astronomic narrowband filters.
I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The filters I was using were SII, OIII and H-alpha, with a total exposure time of 50 minutes for each filter.
Horsehead and Flame nebula in narrowband


Horsehead and Flame nebula, narrowband luminance + RGB


B33 narrowband





Tuesday, 16 January 2018

M1 The Crab nebula

M1 The Crab nebula. This supernova  remnant lies in the constellation of Taurus the Bull at a distance of about 6,000 light years. Lying in its centre is the Crab pulsar rotating at a speed of 30 times per second. I took this image under foggy conditions with cloud cover closing in giving me only about 40 minutes of imaging time. I used my set of Astronomik narrowband filters SII, H-alpha and OIII and was only able to get total exposure times of ten minutes for the SII and OIII channels plus a total exposure time of 20 minutes for the H-alpha channel. I then combined the data with some old R.G.B. data resulting a smoother image reducing the amount of noise in the image.
I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The telescope I was using was my ten
inch f/4.8 reflector with a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera.

Narrowband Hubble Palette



RGB



Narrowband Huble Palette plus RGB




Monday, 15 January 2018

IC5070 The Pelican nebula and IC1396 The Elephant trunk nebula.

IC5070 The Pelican nebula. This nebula lies in the constellation of Cygnus the Swan at a distance of about 1,800 light years, near NGC 7,000 The North America nebula. The sky conditions on this particular evening were very poor, it was hazy with a full moon, stars were only visible down to about magnitude 3.5. However narrowband CCD imaging was still possable. I was using my ten inch f/4.8 reflector with a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera.
I captured five minute sub frames with matching dark frames and combinded them with flat field frames to reduce the effect of vignetting in the final image. I used a set of Astronomik narrowband filters and used the Hubble palette for the colour data using SII for the red , H-alpha for the green and OIII for the blue channel . The total exposure times were 40 minutes for each filter.







IC1396 The Elephant trunk nebula. This dark nebula lies in the constellation of Cepheus the king at a distance of about 2,400 light years. I took this image under very clear, light polluted sky conditions with stars visable down to magnitude 5. I was using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera.
I captured five minute sub frames with matching dark frames and combinded them with flat field frames to reduce the effect of vignetting in the final image. The Hubble palette was used for the colour data using a set of Astronomik narrowband filters, SII , H-alpha and OIII filters. SII for the red channel, H-alpha for the green channel and OIII for the blue channel. The total exposure times for each filter was sixty minutes.






Saturday, 30 December 2017

NGC7000 and IC443, The Jellyfish nebula.

NGC7000 in narrowband with the Hubble palette
Here we have the wall section of the North American nebula, a star forming region in the consellation of Cygnus the swan. I captured five minute sub frames with matching dark frames and combinded them with flat field frames to reduce the effect of vignetting in the final image. I was using my ten inch F 4.8 reflector, a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera. The filters was a set of Astronomik  SII, OIII and H Alpha narrowband filters with total exposure times of 40 minutes for each filter.


IC443 The Jellyfish nebula with the Hubble palette
This lies in the consellation of Gemini the twins. I was using my Ten inch reflector, a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera. I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in thr final image. I was also using narrowband filters Astronomik SII, OIII and H Alpha filters with total exposure times of 30 minutes for each filter.

Saturday, 16 December 2017

IC5146 The Cocoon nebula.

This reflection emission nebula lies in the constellation of Cygnus the swan. Unfortunately the clouds on this particular evening were closing in,  I only had a total of about one hour and ten minutes of imaging time; therefore these images have more noise in them than some of my previous images.  I captured five minute sub frames with matching dark frame and combined them with flat field frames to reduce the effect of vignetting in the final image. The telescope I was using was my ten inch F4.8 reflector, a Vixen Atlux mount, an Atik 383L mono CCD camera and PHD auto guiding. The exposure times were 35 minutes using a H-alpha filter , ten minutes using an SII filter, ten minutes using an OIII filter and fifteen minutes using a blue filter.

Bi-colour image

Narrowband

Hubble Palette

RGB Narrowband composite

This final image of the Cocoon nebula has additional exposure of three and a half hours using a H-alpha filter. A total exposure time of four hours and forty minutes.


Saturday, 9 December 2017

NGC 6992, The Eastern Veil nebula

I took these images on three separate evenings capturing five minute sub frames with matching dark frames , combined with flat field frames to reduce the effect of vignetting in the final image .The total of exposure times for each filter was sixty minutes using SII, OIII and H-alpha filters . I used for the colour data SII for green , OIII for blue and H Alpha for the red . I also had light pollution and moonlight to contend with , on one evening stars was only visible down to magnitude four . The telescope I was using was my ten inch F4.8 reflector , a Vixen Atlux mount with P H D auto guiding . The total exposure time in the final combined image was nine hours .





Wednesday, 29 November 2017

NGC6960 The Western Veil Nebula

NGC6960. The Veil Nebula: Commonly named the Veil nebula, the Cirrus nebula or the Witches Broom nebula. It lies in the constellation of Cygnus the swan shining at a low surface brightness of magnitude 7 at a distance of 1,500 light years. It was discovered back in 1784 by William Herschel.  I took this image under heavy light pollution and a first quarter moon, the sky conditions was very clear however stars was only visable down to magnitude 4.5. I was using my ten inch F4.8 reflector.with an Atlux mount, an Atik 383L mono CCD camera and P.H.D. auto guiding. The exposure time was one hour for each narrowband filter, [ HA . O111 and S11 ] and forty minutes for each R.G.B. filter. I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image.

RGB

Bi Colour

Narrowband

Narrowband Unsharp Masked