Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - jeffweiss9

Pages: [1] 2 3 4
1
TAC Imaging / Re: California Nebula NGC1499 in Perseus
« on: May 18, 2017, 08:40:35 PM »
Looks real good, Rob, and nice write-up.  NB is really best for these emission nebula.  I'm just an LRGB person. I use Ha for these guys but they're often pretty monotone.  I do have two spare slots in my filter wheel, however, so some day.
Cheers,
Jeff

2
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

3
TAC Imaging / Re: Leo Triple with Tidal Tail and Dwarf Galaxy
« on: February 10, 2017, 11:34:18 PM »
...Actually this image was published in the March 2016 Sky and Telescope magazine.
See the article entitled "The Spiral Arms of Spring".   But they actually clipped out the most interesting part (to me anyway) which is the long tidal tail which contains the 2014 discovered Leo Tidal Dwarf Galaxy (TDG) located near the tip of the tail.
Cheers,
Jeff

4
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

5
TAC Imaging / Re: M31 Andromeda
« on: November 16, 2016, 04:29:33 AM »
Thanks, John-
I put up a bigger version (actually just downloaded from the web since I'm on travel).  The link works if you click on the file name.
Cheers,
Jeff

6
TAC Imaging / Re: M31 Andromeda
« on: November 15, 2016, 06:27:22 PM »
Hi, Mark-
Thanks very much.  The attachments here are limited to 200kB which is a pretty harsh rendering but I added that as an attachment. I also added a link to flickr that might behave better for you.
Cheers,
Jeff

7
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

8
TAC Imaging / Re: Big meteor at Calstar on the last night
« on: October 08, 2016, 10:37:25 PM »
Beautiful!! 
CS/Jeff

9
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.

10
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

11
TAC Imaging / Re: VdB 141 Ghost Nebula and region
« on: July 13, 2016, 07:56:46 AM »
Hi, John-
Thanks. Will do in the future.
CS/Jeff

12
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

13
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

14
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

15
TAC Imaging / Re: Aluminum on Aluminum Threads Freeze
« on: April 28, 2016, 08:58:55 PM »
I was trying to build up the suspense :>)
Cheers,
-Jeff

Pages: [1] 2 3 4