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.


Topics - jtalbot

Pages: [1] 2
1
Gallery / NGC 7822 in Cepheus
« on: 2019 October 16 07:37:53 »
A recent image of NGC 7822 in Cepheus.

http://www.starscapeimaging.com/NGC%207822/NGC7822.html

Clear Skies

Jon Talbot

2
Bug Reports / FITS header issues when creating RGB image
« on: 2019 October 15 07:37:06 »
Juan,
I've been working on processing an image using PI 1.8.7 on a IMac using the latest updates/bug fixes.   Yesterday after creating some master RGB images through the BPP script I combined them to a RGB image using Channel Combination.  I then went to photometric color calibration and the image failed to plate solve many times and PCC failed.  After thinking about this I looked at the FITS header of the RGB combined image.  The values in the OBSGEO-L, LONG-OBS, LAT-OBS, OBSGEO-H, ALT-OBS were wrong.  What caught my eye was the LONG-OBS value of +140.  I took the images at a star party at the Long of 102deg West.  After looking some more I noticed the LAT-OBS was wrong too as were other fields.   I ended up editing the FITS header with data from the master Red image and magically it worked and the image plate solved and color calibrated.  I'm not sure if this is a bug or not but this is the first image I've processed with the new version of PI from scratch with the exception of a DSLR image which didn't include this info. I've never experienced this issue before.  I've included a link to my dropbox with the master R, G, and B frames which were created using Image Integration if anyone wants to see if they can reproduce this.  Check out the FITS header of the RGB image.  I also included three single calibrated Red, Green and Blue frames and three uncalibrated Red, Green and Blue frames.  I'm not sure the FITS info is computing correctly during calibration and then RGB combination.

https://www.dropbox.com/sh/c7p7sqk3utjh45d/AACBuy6oJwjgZwtdWJHCfYQka?dl=0

Jon

3
Gallery / VdB123
« on: 2019 September 02 14:16:55 »
Attached is an image I recently completed of VdB 123 and the Serpens molecular cloud.   This image was particularly challenging due to my hot, humid, sea level site and light polluted sky.  Image acquisition details are on the page.
http://www.starscapeimaging.com/VdB123/VdB123.html

Jon

4
Juan,
In the process console I'm seeing a lot of "red" Critical Signal violation messages and after that happens, Icons within PixInsight 1.8.6 start acting funny and sometime disappear.  No crashes  yet but something is up with the QT core. This is happening every time I run PixInsight after installing 1.8.6.   System is a IMAC 5K late 2015, Intel Core I7 4GHZ, 32 gb of Ram.  See attached.

Best,
Jon

5
I will be presenting a two day PixInsight workshop at the 2018 Okie Tex Star Party in Oct.  If you are attending Okie Tex there are a few spots left.  If you want to get in on the workshop see this link.  http://www.okcastroclub.com/phpBB2/viewtopic.php?t=4034

6
Gallery / Flaming Star Nebula area
« on: 2018 January 06 14:46:40 »
A new image I was able to capture in Dec of the Flaming Star Nebula region.
http://www.starscapeimaging.com/page217/index.html

7
Gallery / On the border of Aries, Perseus and Taurus
« on: 2015 December 19 07:27:34 »
An area with some nice reflection nebula, HH objects and lots of dust.  I captured this on the last night of the Chiefland star party.  Really didn't get enough time on the color but it's what I had to work with. 

120min Luminance, 40min Red, 70min Green and Blue

http://www.starscapeimaging.com/page174/index.html

Jon

8
Gallery / Dust and Gas around M78
« on: 2015 February 27 13:14:07 »
I have been very lucky this past Month or two with a period of many clear nights to collect data on M78.  This is the deepest I have been able to go on this object so far.  This version was done combining Ha with Luminance and RGB.  The Ha RGB combine was done using the NBRGB script which worked great.  Pixel math was used to combine Luminance and Ha in order to produce a master LHa image to combine with the HaRGB image.  I used Ha at 100% with the red channel, 20% with the blue channel and 10% with the green channel.  Comments/Criticism's appreciated.

http://www.starscapeimaging.com/page164/index.html

Jon Talbot

9
6 Panel mosaic Image of the North American and Pelican nebula.
4" refractor, QSI 583 WSG camera, Astrodon 5nm Ha, 3nm OIII, RGB filter set.
Each of the 6 panels calibrated, stack, DBE with PI 1.8 RC7, Mosaic built with Gradient Merge Mosaic app.  Ha and OIII added using HaRGB script.
Full image page: http://www.starscapeimaging.com/page125/index.html

Jon Talbot


10
Gallery / Latest Image Sh2-290
« on: 2013 May 01 20:37:31 »
This is my latest processed image and a first for me since its a combination RGB and Narrowband image totally combined linearly in PI 1.8RC7.  I followed the wonderful tutorial from Gerald Wechselberger http://www.werbeagentur.org/oldwexi/PixInsight/PixInsight.html  concerning adding Narrow Band data to a RGB image.  I slightly modified some of the steps but the idea is the same. This is a very neat way to handle this type of data.  A total of 19hrs of exposure time from my backyard. Thanks Gerald!



Jon Talbot

11
Bug Reports / Background enhancement script failure
« on: 2013 February 08 08:46:47 »
Hi, installed RC3 last week on my MAC running
Mountain Lion, 8gb ram. The Bacground enhance script
Fails with a blank screen then PI crashes.
Apologize if someone has already reported this.
Jon

12
Hi folks,

I'm happy to announce that I will be presenting a workshop on PixInsight at the Winter Star Party in the FL Keys next month and at NEAIC in NY in April.  If you are gong to be at either of these events, please look me up.  It would be a pleasure to meet you.

Jon Talbot

13
Gallery / Sh2-149 The Jellyfish Nebula
« on: 2011 November 15 20:57:16 »
This is an image of the Sh2-149 I was able to acquire in late sept.  Calibrated/processed in PixInsight.  I used Vicents method of isolating the Ha continuum and added this to the red frames at 100%.  20% of the Ha was added to the Blue and 10% to the Green frames to account for the Hb signal.  Comments/Criticisms appreciated.

Jon Talbot

14
Gallery / NGC 4565
« on: 2011 May 19 16:10:57 »
May latest processed image taken in March of NGC 4565.  365min of luminance and 1hr each of RGB binned 2x2.  QSI 583, 10" Astrograph.

Jon Talbot

15
Gallery / M42 HDR
« on: 2011 May 02 21:07:49 »
Hi folks,

Here is an image I took of M42 with several exposure times from 5 sec to 120sec to try out the HDR routine. All the data was rather short (total of 30min of exposure time) So its not extremely deep by any means.  I took the Luminance and color this way and created HDR subs of L, R, G, and B.  Combined to RGB and then added the processed Luminance.  The HDWR transform was used on both the luminance and RGB frames.  All the data was there but am having trouble keeping the colors in the core region.  I tried many different types of ways to stretch the color frames so as to not blow out the core and keep the color there but am at a loss on how to do it.  Any ideas?  In the non stretched RGB there is actually some nice color in the trapezium area but how to stretch and not totally saturate it is the question.


Jon Talbot

Pages: [1] 2