2024-01-31, 03:58 PM
Hello,
1. I am concerned that the files you used for your filters may not be formatted correctly. Please send a screen capture, with the Edit Filter dialog open for one of your filters, so I can see the graph.
2. If you want to check things out, I suggest a different target. You happened to pick IC 410, which currently doesn't have any emission line data available for it. There are no emission line catalogs for HII regions, so I have been building my own, based on my own photometry. Its a laborious project, but I have it rolling along now. I am working on a big data drop, and it should be available very soon, like the end of the week if things go well. This will add line strengths for many more nebulae that are common narrowband targets. Without the line actual strengths, they are estimated, based on available broadband color data, and its not always that accurate. To tell if the data is estimated, open the Object Info. It is also indicated on the Exposure page of the Imaging Project, once one is created.
Lets work with M27 for the time being because I know it has valid emission line data.
3. How do you use SNR to help set exposure or plan a night of imaging. There are more steps after the SPB. Its purpose is to create an Imaging Project, and especially it will fill out the exposure goals for each filter. A goal can be to reach a given exposure time, or to reach a given SNR. SNR is a measure of the quality of your images. I suggest reading the SPB help page for an explanation of how SNR is used as a goal. Its the most powerful feature of the software. If you have questions after reading that, and maybe the help for the Imaging Project as well, please feel free to ask.
Once you have an Imaging Project with exposure goals, you usually use the Scheduler to plan a night of imaging. The Scheduler will work more efficiently if you have more than one project defined, because it determines the best time of night to image in each filter for a target, and it is common for one target to not be available for the entire night (or even the part of the night you are imaging).
The Scheduler will attempt to get all of your observations in one night to reach your goals. If not, you enter a summary of what images were obtained in the Observations tab of the Imaging Project. This keeps track of what you have already done, and the Scheduler will only schedule images that are needed to finish the project.
1. I am concerned that the files you used for your filters may not be formatted correctly. Please send a screen capture, with the Edit Filter dialog open for one of your filters, so I can see the graph.
2. If you want to check things out, I suggest a different target. You happened to pick IC 410, which currently doesn't have any emission line data available for it. There are no emission line catalogs for HII regions, so I have been building my own, based on my own photometry. Its a laborious project, but I have it rolling along now. I am working on a big data drop, and it should be available very soon, like the end of the week if things go well. This will add line strengths for many more nebulae that are common narrowband targets. Without the line actual strengths, they are estimated, based on available broadband color data, and its not always that accurate. To tell if the data is estimated, open the Object Info. It is also indicated on the Exposure page of the Imaging Project, once one is created.
Lets work with M27 for the time being because I know it has valid emission line data.
3. How do you use SNR to help set exposure or plan a night of imaging. There are more steps after the SPB. Its purpose is to create an Imaging Project, and especially it will fill out the exposure goals for each filter. A goal can be to reach a given exposure time, or to reach a given SNR. SNR is a measure of the quality of your images. I suggest reading the SPB help page for an explanation of how SNR is used as a goal. Its the most powerful feature of the software. If you have questions after reading that, and maybe the help for the Imaging Project as well, please feel free to ask.
Once you have an Imaging Project with exposure goals, you usually use the Scheduler to plan a night of imaging. The Scheduler will work more efficiently if you have more than one project defined, because it determines the best time of night to image in each filter for a target, and it is common for one target to not be available for the entire night (or even the part of the night you are imaging).
The Scheduler will attempt to get all of your observations in one night to reach your goals. If not, you enter a summary of what images were obtained in the Observations tab of the Imaging Project. This keeps track of what you have already done, and the Scheduler will only schedule images that are needed to finish the project.
Clear skies,
Greg
Head Dude at Skyhound
Greg
Head Dude at Skyhound