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.

sgl_imaging_challenge_banner_dslr_mirrorlesss_winners.thumb.jpg.9deb4a8db27e7485a7bb99d98667c94e.jpg

Tom How

Members
  • Content Count

    173
  • Joined

  • Last visited

Community Reputation

77 Excellent

About Tom How

  • Rank
    Star Forming

Contact Methods

  • Website URL
    http://astro.neutral.org/?utm_source=ForumSig&utm_medium=Forum&utm_campaign=SG

Profile Information

  • Location
    Southampton
  1. Guilty as charged! Time and again I find it hilarious to read some of the drivel I wrote 10 years ago. I guess the date is about 2006/7. Little to be gained from defending historical crimes. Ten years later I hope I am a little wiser... and no doubt a little more curmudgeonly Perhaps one of the points behind the misguided piece was to bemoan a lack of originality. Olly's sentiment should be high in all our minds: Strive to create something original and follow less-trodden paths.
  2. That's half the battle with these objects: Dense milkyway starfields drown out the faint features, even with the 3nm filter.
  3. Thanks! Always a mystery what you'll get with these objects - most of the time you get nothing - but every so often something interesting like this pops up!
  4. http://astro.neutral.org/imagehtml/20160829-G53.6-2.2.html I thought I'd share another infrequently imaged supernova remnant, G53.6-2.2 in Sagitta appears to have a very faint optical counterpart with emission and filaments. Quite tough with the dense starfield, even with the 3nm filter. Might be interesting to come back with the OIII at some point. Abell 63 (PK 53-3.1 ), a small 40' planetary nebula is lurking on the far left centre of the frame. 12*1500s with Astrodon 3nm Ha. Takahashi Sky 90 Atik 490 CCD Camera Takahashi F4.5 reducer/flattener Astrodon 3nm Ha filter Off axis guider with SX Lodestar. Homemade telescope mount. Homemade telescope observatory dome.
  5. Turned out quite strong in OIII. Only a couple of hours with the moon out, so noisy, but makes a nice contrast
  6. I have been doing this since the "webcam revolution" in 2002/2003, and after all these years you do find yourself up some peculiar avenues. Some members may remember the QCUIAG yahoo group which started off the whole webcam imaging trend. Perhaps this is from where I borrow the "unconventional" label
  7. I ran across a paper related to G156.2+5.7 last Jan, and picked up almost nothing from that. In the autumn whilst imaging the well known CTB1 remnant I ran across its sibbling, CTA1, and imaged that. Well, you know how one thing leads to another. I enjoy taking an unconventional approach to many aspects of this hobby. I guess after spending a few years gathering about a third of the Sharpless Catalog, it was time to find something "beyond Sharpless" It is kinda exciting when you shoot something with no reference except survey plates - at least I could see the filaments on the DSS plates. The earlier G182.4+4.3 was so dim it was just "shoot and hope" - I had no idea what I was going too see.
  8. http://astro.neutral.org/imagehtml/20160215-supernova-g206.9+2.3-positive.html Another one of the obscure supernova remnants, G206.9+2.3, following my recent visit to https://stargazerslounge.com/topic/263027-g182443-supernova-remnant/ This one is just east of the Rosette, so probably crops up on a few wide fields of the area, but here it is a bit closer, showing the nice filament structire. almost a mini Veil nebula Lots and lots of milky way fluff in the frame, but the supernova parts are pretty obvious. 24x1200s with Astrodon 3nm Ha. Takahashi Sky 90 Atik 490 CCD Camera Takahashi F4.5 reducer/flattener Astrodon 3nm Ha filter Off axis guider with SX Lodestar. Homemade telescope mount. Homemade telescope observatory dome.
  9. Thanks! I've always taken a rather unconventional route with kit... As we all know, astronomy kit loves to throw its toys out of the pram occasionally. I find it less stressful to resolve problems if I made the pram in the first place, rather than battling with some anonymous black box.
  10. Ah, but their images show extreme closeups of the features. And they did some spectroscopic studies. They were doing proper adult science. I'm just having fun.
  11. Scouring the scientific press: http://arxiv.org/pdf/1208.5990.pdf
  12. This is G182.4+4.3 in Auriga using the 3nm Astrodon Ha filter. About 25x1500s, around 10 hours exposure. I've included three images here. The basic stretched version, an aggressive star-removed one, and a negative presentation. The negative probably shows the most. Judging by the nice filamentary structure, this would work nicely with the other narrowband filters, but I don't think that will happen this year. This is right on the limit of what can be done with my setup - the stars already dominate the image to the point of hiding the nebula. Probably explains why I've not yet found another amateur image of this target. Using a Takahashi Sky 90 doublet refractor FL 409mm @ F4.5 http://astro.neutral.org/imagehtml/20160210_G182.4+4.3-supernova-remnant-optical.html Takahashi Sky 90 Atik 490 CCD Camera Takahashi F4.5 reducer/flattener Astrodon 3nm Ha filter Off axis guider with SX Lodestar. Homemade telescope mount. Homemade telescope observatory dome.
  13. Long clear spells last night, but a big Moon, so I targeted the bright central part of IC1805, the heart of the Heart Nebula and left the scope to get on with it whilst I slept. Ended up with 16x1200s frames worth using between the scattered cloud - which I've pushed on the contrast harder than I normally would to counteract the Moon.. Full image http://astro.neutral.org/images/20130919-ic1805-heart-of-heart-ha-astrodon-3nm.jpg 3nm Astrodon Ha on Skywatcher 8inch F5 newt
  14. Not far from my previous CTB1 target is Sh2-170 from the Sharpless catalogue. This is about 20 arc minutes across, so a bit of a squeeze on my setup. Full sized image available on this page: http://astro.neutral.org/imagehtml/20130914-sh2-170.html Didn't clear last night until gone 11pm but I was about to get 12x1200s frames with the Astrodon 3nm Ha, Skywatcher 200 and the homemade telescope mount. Not very good star shapes - but I had the mirror off yesterday for the annual clean, so anything could be out of alignment. I'll fiddle with that when we get one of those full moon clear nights!
×
×
  • Create New...

Important Information

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