Forums / The Science / Photometry / RE: IRIS-Beginner Version Grief

RE: IRIS-Beginner Version Grief

Citizen Sky is now officially permanent part of the AAVSO. In the coming weeks we will be moving additional content to the AAVSO site and freezing this site as an archive of the 1st three years of the project. Please visit the new landing page for future updates.
  • strict warning: Non-static method view::load() should not be called statically in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/views.module on line 879.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/handlers/views_handler_filter.inc on line 0.
  • strict warning: Declaration of views_handler_filter::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/handlers/views_handler_filter.inc on line 0.
  • strict warning: Declaration of views_plugin_row::options_validate() should be compatible with views_plugin::options_validate(&$form, &$form_state) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/plugins/views_plugin_row.inc on line 0.
  • strict warning: Declaration of views_plugin_row::options_submit() should be compatible with views_plugin::options_submit(&$form, &$form_state) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/plugins/views_plugin_row.inc on line 0.
  • strict warning: Non-static method view::load() should not be called statically in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/views.module on line 879.
  • strict warning: Declaration of views_handler_field_user::init() should be compatible with views_handler_field::init(&$view, $options) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/modules/user/views_handler_field_user.inc on line 0.
  • strict warning: Declaration of views_handler_argument::init() should be compatible with views_handler::init(&$view, $options) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/handlers/views_handler_argument.inc on line 0.
  • strict warning: Declaration of views_handler_filter_boolean_operator::value_validate() should be compatible with views_handler_filter::value_validate($form, &$form_state) in /media/disk/www/citizensky.org/drupal/sites/all/modules/views/handlers/views_handler_filter_boolean_operator.inc on line 0.

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

Caveat: I am really a “beginner”
OK, here is my issue – The version of IRIS that I have downloaded (V5.59) doesn’t match the Beginner tutorial. Since I am slavishly following the tutorial, my frustration level increases. Can you tell me which version the tutorial is written for? I believe that downloading that one would be much easier than trying to help me thru getting the master-bias frames into the directory (OK, I confess that the command line language also alludes me – the “>save master-bias” results in “ERROR: unknow command” Yup, “unknow”
Thanks, jack144
  

Hi Jack, IRIS is updated quite frequently and this has caused us many troubles in keeping our tutorial up-to-date. Grigoris used version 5.58 for the current version of the tutorial (at least that's what he wrote in one of the notes at the start of the tutorial). I'll ask him to comment on this thread to see if we can work out the differences. Oh, as for the ">save master-bias" command above, the ">" portion indicates you are at a prompt (the absence of the ">" indicates something is happening in the background so the command line isn't ready for input), so you just type in "save master-bias". Is this what you did? Brian

Bikeman's picture
Bikeman
User offline. Last seen 1 year 51 weeks ago. Offline

Hi! It's always better to use the latest version of IRIS, so instead of going back to an older version, let's go thru the tutorial and see where it would need an update, After all other users might have the same problem in the future. One frequent error with IRIS is that you need to input the commands without and modification at the prompt (> ) in the command window. It's quite easy to remove or add blanks when working with copy-and-past here. Needless to say, you should not copy the prompt ">" itself into the command line window of IRIS. Maybe this already solves the problem? As for the error messages: The native language in which IRISwas written is French and English was added later. Still it's one of the best freeware programs for astrophotography processing around. CS Heinz

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

Thanks to Brian and Bikeman, I understand about translation issues, I didn't know about the French connection ... I was just clarifying what I was seeing - apologies. Thanks Brian, I have now saved the masters! However, step 4 calls for "open the master dark frame" to improve subtraction. So, I am stuck again .... I don't find a "open" anywhere. Googling command prompts gives a "openfiles" which won't work ... sooo, how do I open the master dark frame. Sorry to be so dumb, its all pretty new to me. Thanks, jack144

Roger Pieri's picture
Roger Pieri
User offline. Last seen 49 weeks 5 days ago. Offline
Joined: 08/29/2009
Posts: 136

Hi Jack, That sentence is just general language, no way the text of a command. In the tutorial any text of console commandSTARTS with the prompt ">" as it is usual. Anything else (even if including >) is executedfrom the menu bar or through dialog boxes. Just use the menu " file / load... " Such combination of console command and classical graphical userinterface (GUI) is special to IRIS and not usual at all. But IRISis like that we have to do with! This comes from the history of IRIS, it started manyyears ago as a consoleapplication and has progressively evolved along years including more and more GUI but the console remains and some operations can only be done with it. I don't think there is something from the tutorial that would not work with the 5.59 version as this version has only a couple of additionalconsolefunctions, nothing has been eliminated. Yours truly, Roger

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

Thanks Roger, I have blundered my way thru the BeginnerStarting tutorial - I'll wait till tomorrow to tackle the Excel Spreadsheet. My head is a bit "overcast" at the moment. Thanks for your comments. Jack144

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

NEXTPROBLEM! RE:RIS_BEGINNER Step 3 instruction to type in command "GRAY_FLAT" at the prompt to normalize the CFA_FLAT before saving results in ERROR: unknown command. Any suggestions? Thanks, jack144


Hello!! Iexpect that every update enhances a program without reducing its capabilities. So Ihope that thet the cause is only a matter of input... in this case I see that you write "GRAY_FLAT", which is capitalized, so try the lower case (grey_flat)to see if that is working. If not then we will have to chech more thoroughly what's going on. Best wishes, Grigoris edit: after submitting the post I cheched again and what I thought it was a typo finallyI think its the answer.. I wrote "grey_flat" which is the correct and not "gray_flat" (probably english / american difference ?).

Roger Pieri's picture
Roger Pieri
User offline. Last seen 49 weeks 5 days ago. Offline
Joined: 08/29/2009
Posts: 136

HI Jack, May I also suggest you check the documentation of the IRIScommands when you get such problem ? Here it is: http://astrosurf.com/buil/us/iris/reference/commands_iris_v5.58.pdf Between the version 5.58 and 5.59 thereis only one command addition thatis defined at: http://astrosurf.com/buil/us/iris/iris.htm But if you discover something odd, please, let us know. Yours truly, Roger

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

Grigoris,
I had tried that to no avail - it still comes back with the unknown command error (actually "unknow") The capitalization was per the tutorial. Any help will be appreciated - actually there are a couple of other problems as well. A few I have resolved ... such as: I believe that
the additional information required in step 5, and not listed in the tutorial example, would be generic name"final"and the number would be “1” But, I am not sure.I am keeping a list of some suggested changes to the tutorial to help dummies like me ... but, please stay tuned to this thread, I'll need imput to get over the bumps in the road.
Thanks, jack144
Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

.... just another language issue .... it's "grEy_flat", not "grAy_flat" ... thanks for the tip! I printed out the list of commands and noticed what I was doing wrong. jack144

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

Here I am requsted to input "3d step" into the "cosmetic file box - which returns a file not found ( I checked and it is not in the directory nor any file with a name even close to that) What next?


If I understood correctly you are at step 3.4. After step 3.3 (where you create the master-flat with the "grey_flat" command) you have saved an image named "master-flat". It is this image that you have to open in the next step. If you have just saved the previous image the master-flat is already loaded - IRIS keeps the last processed image opened in its window. Ihope that this helps... Grigoris

Jack144's picture
Jack144
User offline. Last seen 32 weeks 5 days ago. Offline
Joined: 03/02/2011
Posts: 24

Thank you Grigoris, I was a bit unsure about the word "open" used int the tutorial. I did realize that open = "load" jack144

ptsouth97's picture
ptsouth97
User offline. Last seen 1 year 8 weeks ago. Offline
Joined: 07/17/2011
Posts: 6

Hello,

I'm also trying to work my way through the IRIS beginner tutorial and I'm having problems. I'm a complete beginner, so some of the terms are confusing me. For example, is a flat-dark frame the same as a bias frame? I ask because the sample data has flat-dark frames but not bias frames. Are you supposed to use the flat-darks as bias frames?

Also, I can't get a good result for improving the dark frame subtraction. Every number I tried in "find_hot cosme XXX" resulted in an output of zero. When I tried doing the same with the flat-fields, it gave me an error. Can someone give me an idea of what I'm doing wrong?

Thanks!
Blake

Roger Pieri's picture
Roger Pieri
User offline. Last seen 49 weeks 5 days ago. Offline
Joined: 08/29/2009
Posts: 136

Hi Blake,

There is no such issues between versions of IRIS for several years, the issue IS THE TUTORIAL you probably got at:

 > DSLR Photometry Tutorial / Starting Analysis / IRIS-Beginner

There is an improved one (not perfect.... sorry) at:

 >  Teams / DSLR Documentation and Reduction / IRIS Tutorial

To get it I think you should first subscribe as a team member.

You will see that the question of the bias has been addressed in this version. Using a bias has little meaning for DSLR as the bias signals are in the dark but IRIS is made for astro cameras that use a separated bias, it's mandatory in IRIS, the reason why we have to create a "dummy" bias (if you use a Canon apply > fill 1024 ! ) 

"find_hot cosme XXX" is a process of detection of hot pixels in a dark image. It generates a table of hot pixels that are then processed in other images (replaced by surrounding average) The detection threshold (eg. 500) shown in IRIS (or the tutorial) was right for old CCD DSLR 12 bits, 2000~3000 would probably be safer for a recent CMOS 14 bits. Recent CMOS would have much less hot pixels, maybe yours has none ? Normally that function works well, the number of hot pixels shown is typically 5~10 on a standard quality sensor (not 100~200 as said in the tutorial !). Do not use a low threshold number, then it would detect noise instead hot pixels and would wrongly eliminate too many. Anyhow for a camera in good shape this process is not essential for photometry (it has been designed for imaging in fact)

That function doesn't have meaning for a flat (each pixel is at high level in a flat and the software would find all are "hot" !!! ) Another error of the tutorial (probably the wrong "d" reference)

Clear Skies !

Roger


Hi Roger,

I copied the document in the teams section to the main website so these issues are addressed in the main tutorial. Thank you for catching this.

Blake, if you have any further questions please feel free to contact us.  We're always happy to help.

 

Brian 

ptsouth97's picture
ptsouth97
User offline. Last seen 1 year 8 weeks ago. Offline
Joined: 07/17/2011
Posts: 6

Thanks guys.  I will work through this tutorial and let you know if I have any questions.

Blake

ptsouth97's picture
ptsouth97
User offline. Last seen 1 year 8 weeks ago. Offline
Joined: 07/17/2011
Posts: 6

Hello,

I'm having more luck with the updated tutorial, but I'm not sure that I'm doing the correct thing for RGB separation.  I'm running version5.59 of Iris and the RGB separation menu looks slightly different than the tutorial because it asks for the generic name and the number of files.  It is my understanding so far that after all of this calibration and conversion, the images are stacked into one file in step four.  I saved this file as "final."  Then, for RGB separation, I put "final" in as the generic name and subsequently "final-r", "final-g", and "final-b" for the RGB sequence.  Next, I put the number as "1" because I assumed that this is just for the one file.  However, I then got an error that final1.pic cannot be found.  If instead I put in the files from the previous step (img-reg) I can get the channels to separate, but it feels like I'm missing a step when I do it that way.  Any help would be greatly appreciated.

Thanks,
Blake

ptsouth97's picture
ptsouth97
User offline. Last seen 1 year 8 weeks ago. Offline
Joined: 07/17/2011
Posts: 6

I have continued to play with the IRIS tutorial and I think I corrected some of the mistakes that I made.  After stacking the 3 sample images, I used the RGB separation to create 9 files:  final-r1, final-r2, etc.  Next, I examined only the 3 green channel files using the aperture tool.  However, I'm not sure if I collected the correct data.  I got 3 instrumental magnitudes for eps Aur (-11.763, -11.743, -11.766) and 3 instrumental magnitudes for a check star:  Iam Aur (-10.733, -10.771, -10.705).  For the other comparison stars in the excel spreadsheet, I only took one instrumental magnitude for each from one of the green channel files.  Is that right?  I used the same stars as in the tutorial and got m=0.116 and b=-15.550.  The average Check V Mag I got was 4.754, which is obviously off by more than +/- 0.01magnitude from the catalog value of 4.705.  Also, the average V Mag I got was 3.730.  Any ideas on what I may be doing wrong?

Thanks,
Blake
 

Roger Pieri's picture
Roger Pieri
User offline. Last seen 49 weeks 5 days ago. Offline
Joined: 08/29/2009
Posts: 136

Hi Blake,

In my last post I said: "not perfect... sorry " You got it ! 

This section of the tutorial is a poor mix between a process with "stacking" and a process of photometry of each image. You are perfectly right: after stacking only one image remains being the average of the series. Then the photometry is made on that single picture. This reduces the work to be done but has the drawback of making statistics impossible (Calculation of the SD - standard deviation - of the series and the final Standard Error on the average) Such statistics are important indicator of the quality of the data and the shoting condition optimization. 

The three images provided for the tutorial are not representative of a true observing session but just an exercise. There are only three due to the size of the files to be distributed.

An usual session needs an integration of the sky scintillation during at the very least 60 seconds for one series. As the exposure time on tripod is no more than 5~10 seconds that means an usual series includes about 10 images.  In general we make several of such series in an observing session. Comparing the results of the series permits to detect other problems like the said "flying shadows" (light clouds we do not see, mass of wet air passing by... ) To do this I use an automated software that analyse all images. This is certainly too much work with the manual IRIS process (IRIS has an automated process not used here).

To get some statistics with a minimal work under IRIS you could do several short series, for example: 5 series of 6 images exposed 8~10 seconds. Next you stack each series that results in 5 values for each star. Then you can calculate an acceptable SD from that 5 values and the SE of their average.  

After stacking normally the resulting image remains in the memory and is displayed. If not reload it. You can directly separate that image to RGB using:

   Menu Bar: Digital Photo \ RGB separation...

The dispersion you get between images seems normal, due to scintillation (to see hereabove) For the best accuracy you should use as much as available images/results for each star involved. 

Another point not noted in the tutorial: it's important no pixel of bright stars involved in your survey is saturated. Before processing you could check one of the raw image of your series using:

  Menu Bar: File \  Load a RAW file... 

Then draw a box with the left mouse button around the brightest star, click right, use statistics. A dialog box will show you the max value. With
a CMOS 14 bits you can go high, like 12000 (ISO 100) For a CCD 12 bits with antibluming it's probably better to not go above 2500~3000 to remain in the linear zone of the range.

I am presently reviewing the tutorial and should deliver an improved one soon.

Clear Skies !

Roger  

docnrozzie's picture
docnrozzie
User offline. Last seen 1 year 38 weeks ago. Offline
Joined: 02/23/2010
Posts: 5

New and starting over !                        Did Jack144 and ptsouth 97 ( Hi Blake)  get IRIS up and running to do DSLR photometry ?
I started down this path about 18 mo. ago and abandoned the journey.  I really want to add to my visual observing program, so I'm attempting it again.
I've downloaded IRIS 5.59 and the windows all seem to have made the trip.  I've also downloaded the "Sample Data" from Citizen Sky site.
First question:  What is the most current tutorial to be following ?

I've made it to step 2.b  hit "CFA" and can  only partially load the 3  practice iMG (.CR2)  files and the program hangs up and gives me an error messange : "Can't process"  ??

I can be very persistant, but  I'll need a little handholding here.
 Hopefully someone is still following this thread and can lend some aid.
 Thanks,
 Doc
Walt "Doc" Fahey
docnrozzie@aol.com

docnrozzie's picture
docnrozzie
User offline. Last seen 1 year 38 weeks ago. Offline
Joined: 02/23/2010
Posts: 5

Out of Starting BLOCKS !

I believe I successfully downloaded IRIS 5.59 and also downloaded the tutorial sample images.

At Step 2 b. in the tutorial ( CFA ) I got the following "error message".
 Any suggestions ?
 Thanks,
 Walt  "Doc" Fahey

AttachmentSize
IRIS Error 2 .b..jpg 57.52 KB
Roger Pieri's picture
Roger Pieri
User offline. Last seen 49 weeks 5 days ago. Offline
Joined: 08/29/2009
Posts: 136

Hi Doc,

IRIS is normally very reliable, maybe some file has been corrupted ? You could check the .cr2 image files by loading one of them using:

Menu bar:  file > Load a RAW file...   

If it works the file is ok and dcraw.dll works well (the RAW decoder used by IRIS) 

Then the interface of IRIS is not classical at all: it needs to pass the Windows files sequence names to the box you used:

Menu bar: Digital photo > Decode RAW files...

Then open the Windows Explorer folder where the cr2 files are, select ALL files to process, drag and drop ALL into the IRIS "Decode RAW..." box.

Then define a generic name ("Name" at box bottom) for the new files to be generated by IRIS from those decoded .cr2 files. IRIS will put a number after your generic name starting from 1 up to the total number of files you dropped into the box. This forms a "sequence".

At end click "->CFA"

The result is a set of .pic files of CFA images in the working folder of IRIS. This file format is specific to IRIS.

This should be repeated for each file type: the images, the darks, the flats... with their respective generic name.

As denoted in another post there is a mistake at end of this tutorial, if you stack the images then there is only one image to separate into RGB. The command to use is:

Menu bar:  Digital photo... > "RGB separation... "

Hope that helps.

Clear Skies !

Roger

docnrozzie's picture
docnrozzie
User offline. Last seen 1 year 38 weeks ago. Offline
Joined: 02/23/2010
Posts: 5

ERROR  MESSAGES !

Thanks for the info back Roger: I've tested the .CR2 image files (one @ time >Load a RAW File ..  and there is a good image with stars there ...

ERROR 1: ... When click on IRIS to start program :  "Program can't start because FreeImage.dll is missing from your computer" - I've deleted and reloaded the IRIS program 5 times and continue to get the same error message ???

Once I go in through the back door to the program and start to load data I can get to  section "2 b. "  in the tutorial  ... pressing > CFA yields the following Error Message:    "Impossible to read file C:\USERS\OWNERS\APPDATA\LOCAL\TEMP\wz02d5\IMG_3147.CR2

I beleive I indicated that by testing the individual img files -- they were good -- had stars -- and had made the download, unzip trip :-( ???

 Suggestions Welcome,

Doc

Roger Pieri's picture
Roger Pieri
User offline. Last seen 49 weeks 5 days ago. Offline
Joined: 08/29/2009
Posts: 136

Hi Doc,

Apparently you have a problem with the installation of IRIS. FreeImage is a library from sourceforge used by IRIS and part of the package.

I suggest you check the program folder containt. Maybe Windows did block the installation of that dll ?

Attached is the containt of my own installation that works very well.

Clear Skies !

Roger

AttachmentSize
IRIS-instal.png 9.83 KB
Ricochet's picture
Ricochet
User offline. Last seen 2 years 12 weeks ago. Offline
Joined: 01/02/2012
Posts: 2
Teams: None

Small correction for the IRIS tutorial:

Step 5 - Selecting green channel:

The recent version of IRIS (i.e. 5.57 or newer) include a quick and easy way to pull out the RGB channels:

From the Digital Photo menu, choose Sequence RGB Separation

Because we have only one image. The screen capture is the correct one.


Hi Ricochet,

Thanks for the correction.  I have updated the tutorial.

Brian 

Powered by Drupal