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Topics - jeffweiss9

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1
TAC Imaging / NGC 6946 Fireworks Galaxy and SN 2017eaw
« on: August 11, 2017, 02:24:30 PM »
This is an 11.7 hour HaLRGB of the Fireworks Galaxy and its most recent supernova, SN 2017eaw (in the upper arm at 1 o'clock).  Taken during three different nights at the Bear Gulch Users Area at Pinnacles N.P., East. Conditions were excellent the first night with SQM readings to 21.80 (21.90 for another imager) and quite good the other two nights.  Great place.

Link at http://www.astrobin.com/306884/.

Cheers,
Jeff

2
TAC Visual / Advice needed for Pinnacles East
« on: June 20, 2017, 07:50:32 PM »
D.A.R.C. is down for 2 weeks and I'd like to try the Pinnacles East (road closure on the West) for some imaging but I need advice on best observing location there.  Is that at the campground (where Clear Sky Chart is) or up 146 somewhere like the 'peak view point (sounds more likely).  Suggestions or info appreciated.
Thanks,
CS/Jeff

3
TAC Imaging / M101 Pinwheel Galaxy
« on: June 12, 2017, 09:47:18 PM »
Here's a 12.3 hr HaLRGB of M101 just finished:
http://www.astrobin.com/299304/
Imaged at D.A.R.C. Obs.
Cheers,
Jeff

4
TAC Imaging / M81/M82 with IFN
« on: April 06, 2017, 10:14:36 PM »
I wanted to see how much IFN I could pull of the M81/M82 region and there is definitely plenty that came out in this 9.8hour HaLRGB.
Full resolution and write up at:
http://astrob.in/290675/
A comparison of inverted image with S. Mandel's IFN in this region is at:
https://www.flickr.com/photos/9906726@N08/33497573950/in/dateposted-public/
The galaxies are composited by exposure time with a higher resolution M81,M82 from 3 years ago  with another 12.2 hours for 20hours total on those two galaxies only.
CS/Jeff

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TAC Imaging / California Nebula NGC1499 in Perseus
« on: December 10, 2016, 06:14:37 PM »
Here's a recent HaLRGB image of the California Nebula (5.9hrs).
http://astrob.in/275714
Enjoying imaging at f/4.5 with a larger FOV (2.6 x 2.1 deg) to get these larger targets than I used to.
CS/Jeff

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TAC Imaging / M31 Andromeda
« on: November 15, 2016, 08:29:42 AM »
Here's a shot from last month of M31 Andromeda Galaxy.  It's a 5.2hr LRGB at f/4.5 with my new ML16200 camera using my APM-Riccardi 0.75x focal reducer / field flattener.   Full resolution at:

http://www.astrobin.com/full/269577/
or
https://www.flickr.com/photos/9906726@N08/29945445523/in/dateposted-public/lightbox/

Clear skies,
Jeff

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TAC Imaging / LDN 914
« on: October 04, 2016, 09:02:12 PM »
Here's a recent image of a large dark nebula in Cygnus just below the Pelican that should be easily visible.  It's 2 degrees long and I've only found 2 other images of it. But I think its pretty although rarely imaged.  Image and details at:

www.astrobin.com/266548/

CS/Jeff

Details reproduced here:
This is an 2.6 x 2.1 degree image of Lynds Dark Nebula 914 (LDN 914) in Cygnus just below the Pelican. It is a 6.7hr LRGB using my new FLI ML16200 camera with, for the first time, the Riccardi 0.75x focal reducer/field flattener to get this large FOV. I could find only two other instances of it being imaged on the web: one by the ESA Hershel observatory in the far infrared where this “crack in the sky” was glowing and the other a luminosity image by Werner Mehl where it was completely opaque. This is a 6.7 hour LRGB version of this interesting object that apparently has been rarely imaged.

From the reference below, the LDN 914 dark nebula is a 2 degree ribbon of cold dust and gas that is about 50 light-years long and has about 800 times the mass of the Sun in total, plenty of raw material to make future stars. It glows in the far infrared emitted by very cold objects, such as clouds undergoing collapse. But in visible light, LDN 914 is black because, as we know, cold dust is extremely opaque, blocking the light from stars behind it.

Ref: Phil Plait, Bad Astronomy blog
http://www.slate.com/.../herschel_telescope_image_of_a...

Taken at D.A.R.C. Observatory, Mercey Hot Springs, CA 9/4/16, 9/24/16.

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TAC Imaging / FLI ML-8300 and Field Flattener for Sale ***sold
« on: September 11, 2016, 07:21:26 AM »
Having upgraded to the FLI ML16200, I have my ML8300 for sale, if any TACO's are interested with local preference. I believe these are widely recognized as the best 8300 chip cameras out there with 50+ degree cooling and excellent performance.
I'm asking $2800 for the camera.  If you have an ~f/6 refractor, I have a Williams Optic field flattener that flattens the full FOV very well for $240. That includes a Precise Parts adapter that spaces the field flattener perfectly for the ML8300 and the FLI filterwheel/camera combination (filterwheel is not for sale).  Everything together is $3000. asking price.
Details, sample images and contact info at:
http://www.astromart.com/classifieds/details.asp?classified_id=927611
Thanks,
Jeff

9
TAC Imaging / VdB 141 Ghost Nebula and region
« on: July 12, 2016, 09:30:58 PM »
Here are a narrow and wider framing with extended nebulosity of the VdB 141 region taken with my new FLI ML16200 camera and new Riccardi Model 1 1.0x field flattener.  They are the same 8.2 hr LRGB images from D.A.R.C.  Still working on some autofocus and/or other issues but hopefully getting there.
http://www.astrobin.com/254935/
http://www.astrobin.com/254937/
Cheers,
Jeff

10
TAC Imaging / M101 Pinwheel Galaxy Test Shot
« on: June 27, 2016, 08:16:34 AM »
Here's a short 2.5hr test shot of M101 with a new FLI ML16200 camera from June.

http://www.astrobin.com/253370/

Ready with an improved field flattener and other tweaks for the coming cycle but I won't be making it to GSSP.
CS/Jeff

11
TAC Imaging / NGC2903 barred spiral
« on: May 08, 2016, 09:25:36 PM »
With only 2 nights of imaging in all of 2016 thus far due to poor conditions, I managed this 10.3 hr LRGB of NGC2903 from 1 night in February and a short moon night in March:
http://astrob.in/247090
Jetstream turbulence gave very poor seeing (>~5 arcsec) and there were other problems (poor focus, short on color data), but it was dark and good to be out there.  I'm hopeful conditions will now begin to improve.
Clear skies,
-Jeff

12
TAC Imaging / Aluminum on Aluminum Threads Freeze
« on: April 25, 2016, 09:08:21 PM »
Anyone have experience freeing up aluminum on aluminum threads (both anodized) that are now frozen?
I have a focal reducer / field flattener (Riccardi 0.75x) that has had a 92m x1 to 82m x1 adapter on it for 3 years which is now completely frozen to the 82m x1 threads of the Riccardi.  I now need to remove that adapter and mount it permanently on the 3.5" Feathertouch Focuser with 92m x1 threaded endcap in order to accommodate the old focal reducer as well as a new Riccardi 1.0x field flattener I have ordered to flatten my f/6 images over my new larger chip (ML16200).
Seeking advice.
Thanks,
CS/Jeff

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TAC Imaging / Sh2-199 Soul Nebula
« on: November 22, 2015, 11:52:47 AM »
14.8hr HaLRGB from the last two weekends:

http://www.astrobin.com/228045/C

Cheers,
-Jeff

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TAC Imaging / Southern Winter Milky Way from Greater Kruger
« on: September 01, 2015, 10:04:46 PM »
Panorama of the Southern Winter Milky Way taken in the South Africa with one hand on the remote trigger or tripod while the other hand shined a flashlight on the bush to make sure that the lions and other critters didn't wonder into the picture (and the photographer).

http://www.astrobin.com/202335/E/

Got to get back to regular AP, but unfortunately I won't be at CalStar this year due to my wife's birthday on the 12th.
-Jeff

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TAC Imaging / Sh2-101 Tulip Nebula
« on: July 10, 2015, 09:19:05 PM »
Sh2-101, the Tulip Nebula, is shown embedded in the rich Cygnus Star Cloud of the Milky Way with lots of colorful stars in this image.

http://astrob.in/188455/F/

6.9hr LRGB
Clear skies,
-Jeff

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