Practice Images for CCD Photometry?

In summary, the conversation is about the search for FITS images of bias/flat and standard stars for practicing CCD photometry. The person has contacted their local university and observatory for a public archive but has not received a response. They have also found the IRAF example files and were able to obtain a large amount of data from NOAO's public archive with the help of a java-based download manager.
  • #1
mishima
575
43
Hi, it seems astronomical FITS images are abundant on the internet. However, I am looking for FITS images of bias/flat and standard stars along with observations to practice CCD photometry and having a harder time.

I would like to be able to take a set of images and obtain the transformation equations in UBV, for instance (using IRAF tasks). Does anyone know a source of FITS which includes bias/flat/standards?
 
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  • #2
Still looking for a good source of FITS with object, dark, bias, flat, standards, etc.

I contacted my local university's astronomy department as well as a nearby observatory hoping for a public archive of some sort. No response yet, I suppose its a weird thing to ask...

I also found the IRAF example files which includes a few image sets.
 
  • #3
Well, with a little fiddling I was able to figure out NOAO's public archive to get a full night's worth of data from some random run 5 years ago.

http://portal-nvo.noao.edu/

Not sure this is the best, but it was quite usable with a java based download manager for grabbing the 410 files (1.4 G) worth of data.
 
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Likes yucheng and Drakkith

FAQ: Practice Images for CCD Photometry?

1. What is CCD photometry?

CCD photometry is a method used in astronomy to measure the brightness of stars or other celestial objects. It involves using a charge-coupled device (CCD) camera to take images of the target object, and then analyzing the resulting images to determine the object's brightness.

2. Why is it important to have practice images for CCD photometry?

Practice images are important because they allow scientists to test and refine their techniques for CCD photometry before using them on actual data. This helps ensure more accurate and reliable results.

3. What types of objects can be studied using CCD photometry?

CCD photometry can be used to study a wide range of objects, including stars, planets, galaxies, and other celestial objects. It is particularly useful for studying objects that vary in brightness over time, such as variable stars.

4. What factors can affect the accuracy of CCD photometry?

Several factors can affect the accuracy of CCD photometry, including atmospheric conditions, the quality of the equipment used, and the techniques and software used for data analysis. Light pollution and image noise can also impact the quality of the data.

5. How can I improve my skills in CCD photometry?

To improve your skills in CCD photometry, it is important to stay updated on new techniques and software, practice regularly with different types of objects, and seek guidance and feedback from experienced astronomers. It is also helpful to have a good understanding of the fundamentals of astronomy and data analysis.

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