Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

steppenwolf

Moderators
  • Content Count

    14,382
  • Joined

  • Last visited

  • Days Won

    8

steppenwolf last won the day on February 12

steppenwolf had the most liked content!

Community Reputation

6,166 Excellent

About steppenwolf

  • Rank
    Moderator

Contact Methods

  • Website URL
    http://www.skyatnightimages.co.uk

Profile Information

  • Gender
    Not Telling
  • Location
    Nr. Wiston, West Sussex
  1. Thanks, Gina, I'm pleased you like it.
  2. Thank you, John. I think the biggest differences come about when using narrowband techniques as there is no 'standard' to aim for so anything goes when it comes to processing the data! For example, you have used the full Hubble Palette of SII, Ha and OIII whereas I have only used Ha and OIII to produce a bi-colour image and there are several ways of mixing just those two sets of data.
  3. That’s very sad news - Heather was a great communicator and did some interesting projects with Nigel Henbest.
  4. Thank you, Steve, I'm pleased you like it! Thank you Des, yes, the OIII data is very strong on this object so a mono image using just this data works very well - I much preferred the OIII data to the Ha in this case which is very unusual!
  5. There is plenty of fine detail in your data yet to be extracted so don't lose this as you can revisit it as you hone your skills. For now, concentrate on getting the background level a little lower and balancing the colour palette a little to reduce the red dominance - yes, of course there is plenty of lovely red nebulosity in this region but you want a more neutral background. My book, already in your possession will explain how to do this. As for video, anything by Robert Gendler or Jerry Lodriguss is a must watch!
  6. Thanks, yes, it surprised me too but then I guess it is still quite 'young' and has a lot of growing to do!
  7. Thank you, I'm pleased you like it. Thanks, Michael - in hindsight, I really wish I had thought about this object when I started imaging about 13 years ago as I could have done my own research into its continuing expansion. I guess it is never too late to start!!
  8. The mount is the most important component of any imaging system and the HEQ5 Pro is an excellent choice in this regard, especially with a small refractor like the Sky-Watcher 72ED. This refractor, especially later versions should be a good basis for an imaging rig but you will also require a field flattener and the one supplied by OVL specifically for this instrument would be a good choice. Good luck on the slippery slope that is astrophotography!
  9. Thanks, Martin - the seeing for the OIII was excellent but much less so for the Ha where I was troubled with either poor transparency or when it was good and clear, rather poor seeing!
  10. Thank you Olly and thanks also for pointing out an ambiguity in one of the documents that I used to research my text!
  11. Thank you, I use these posts as an excellent opportunity to brush up on my own knowledge (or lack of it!). You are too kind, Alan but thanks. I have to say that the Esprit 150 continues to impress but isn't this a tiny object even at 1070mm focal length? .... and I cropped this image too..... Thank you, I too believe that this makes a really excellent target for narrowband imaging. With regard to the whisp off to the right in OIII, I was originally alerted to this by @ollypenrice who produced an excellent OIII mono version recently. Thank you, I am pleased you like it. Thanks, Brian.
  12. M1 - The Crab Nebula Introduction The Crab Nebula in the constellation of Taurus is a supernova remnant (designated SN 1054) from a star that went supernova in 1054 and was originally observed by Chinese astronomers who recorded the event in some detail, describing it as a ‘guest star’. Their records show that the star shone approximately four times brighter than the planet Venus and was visible during daylight hours for 23 days. The nebula wasn't officially recorded until 1731 when it was observed by the English astronomer John Bevis and added to the Messier catalogue in 1758. We have William Parsons the 3rd Earl of Rosse to thank for its common name following his observation and subsequent sketch of the nebula in 1840 that looked rather like a crab. During the summer of 1967 a U.S. Air Force officer, Charles Schisler,who was on radar duty at the Clear Air Force Base in Alaska noticed a fluctuating radio source. Over the course of several days Schisler noticed that its position coincided with that of the Crab Nebula. Unfortunately, Schisler’s findings went unpublished but were unearthed in 2007. In 1968 Puerto Rican astronomers discovered the same pulsing radio source and it was determined to be a pulsar, a rapidly rotating tiny star flashing about 30 times per second. Now known as the Crab Pulsar this is a neutron star (NP0532) 100,000 times more energetic than the sun and was the progenitor of the nebula. Because of its energy and relatively recent (in cosmology terms) appearance, the nebula has been the focus of many measurements and the filamentary expansion of the nebula is detectable in many pairs of high resolution images captured more than 20 years apart. I have struggled to capture all the Ha data that I wanted for this image as the appalling weather during much of January and February has put a severe limit on my activities but I did capture a pleasant amount of the OIII data which shows some lovely detail in just a mono image and is included below for reference. With the object now setting on my local horizon just before 02:00 and no letup in the poor weather in sight, I have decided to call it quits for this season and just process what I have got! Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 Flattener: Sky-Watcher Esprit specific Camera: QSI 683 WSG-8 Filters: Astrodon 3nm Ha, 3nm OIII Subframes: 16 x 1800 sec Ha, 18 x 1800 sec OIII Total Integration: 17 hours Control: CCD Commander Capture: MaxIm DL Calibration, Stacking and Deconvolution: PixInsight Post-Processing: PhotoShop PS3 Location Constellation Taurus RA 05° 34' 20.7" DEC +22° 00' 39.9" Distance ~6500ly Edited to show the correct date of the Puerto Rican astronomer's discovery of the pulsar thanks to @ollypenrice who kindly pointed out an ambiguity in the text that I consulted during my research on the write-up for this post!
  13. steppenwolf

    MESU 200

    Totally agree, the after sales service that I have had from Lucas both for myself and for people that I have been helping out with technical queries has been exemplary. Nothing quite like dealing with the designer and constructor directly, I couldn't be happier with his responses.
  14. My pleasure - I should add that in my suggested solution, the LesveDome system already relies on the presence of a Velleman K8055 USB interface so you *may* need two of these cards - one to satisfy the 'LesveDome control' (which can be simply set up for ROR use) and one for all the additional items that you may want to switch on and off. I suspect that you will find this article of great interest!
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.