I've been using IRAF Starfinder from the photutils package to identify sources from a fits image, or rather from the 2D array extracted from a fits image. The identificaiton of the sources seems to be working pretty well, and I get an astropy table with all the usual parameters. However, I'm looking to simply get the total counts of the sources (total count meaning the sum of the values of the pixels within the radius of the source). I realise the radius also isn't defined here, but some factor of the FWHM should suffice here. The flux parameter seems to be the closest thing to what I want, but in the documentation it describes this as the object flux calculated as the peak density in the convolved image divided by the detection threshold, which isn't what I'm after. Is there an easy way to do this? I'm very new to these packages and this form of analysis in general, so apologies if this is an obvious/silly question. Thank you for your time!
Photutils/IRAF Starfinder: Give Total Counts
390 Views Asked by Cal At
1
There are 1 best solutions below
Related Questions in PYTHON
- How to store a date/time in sqlite (or something similar to a date)
- Instagrapi recently showing HTTPError and UnknownError
- How to Retrieve Data from an MySQL Database and Display it in a GUI?
- How to create a regular expression to partition a string that terminates in either ": 45" or ",", without the ": "
- Python Geopandas unable to convert latitude longitude to points
- Influence of Unused FFN on Model Accuracy in PyTorch
- Seeking Python Libraries for Removing Extraneous Characters and Spaces in Text
- Writes to child subprocess.Popen.stdin don't work from within process group?
- Conda has two different python binarys (python and python3) with the same version for a single environment. Why?
- Problem with add new attribute in table with BOTO3 on python
- Can't install packages in python conda environment
- Setting diagonal of a matrix to zero
- List of numbers converted to list of strings to iterate over it. But receiving TypeError messages
- Basic Python Question: Shortening If Statements
- Python and regex, can't understand why some words are left out of the match
Related Questions in ASTROPY
- How to access the quasar spectrum from the FITS file in SDSS DR16 catalog
- Calculate rise / set time from Ra, Dec, Longitude and Latitude
- Astropy `SkyCoord` gives incorrect results when transforming points near the Declination pole
- How do I use Astropy to transform coordinates from J2000 to Lat, Lon, and Altitude
- AstroPy to transform coordinates
- Why am I getting " 'TableList' object has no attribute 'columns'?
- Cannot import name 'update_default_config' from 'astropy.config.configuration'
- weighted binning of the data with uncertainties
- How to read a group of datasets as files in a folder?
- How do I convert from cartesian ECEF coordinates to RA and Dec as seen from a specific earth location?
- Centroids (photutils.centroids) uncertainty
- PIL does not visualise FITS files
- How to flatten 3d astronomical coordinates into 2d polar form in Python
- astropy exits none zero on header update
- Astropy: SkyCoord.from_name() - module 'urllib.request' has no attribute 'HTTPSHandler'
Related Questions in PHOTUTILS
- Centroids (photutils.centroids) uncertainty
- According to documentation photutils.aperture.CircularAperture does not accept a list of floats for 'r', what is the recommended method for this?
- TypeError: __init__() got an unexpected keyword argument 'registry'
- ModuleNotFoundError: No module named 'photutils.geometry.circular_overlap
- How to create a progress bar for iterations happening within installed modules
- How to tell `photutils` to plot only apertures which satisfy a condition?
- How to save a QTable to a file (.txt, .csv, etc.)
- How can one plot Elliptical apertures for a list of values of major and minor axes?
- Find_Peaks: Invalid shape (4951,) for image data. Possible solutions?
- Precise detecting light sources center from the image with oversaturated pixels
- Photutils/IRAF Starfinder: Give Total Counts
- Sort out same star from Photutils DAOStarFinder Tables of multiple figures
- Goodness of fit in PSF photometry with photutils BasicPSFPhotometry
- How to crop a FITS image in Python in a given shape?
- photutils residual_image has stars when saving it to fits file
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
You're asking for aperture photometry. Check out the examples on this page:
https://photutils.readthedocs.io/en/stable/detection.html
They start with the catalog, like the one you have in hand (source positions), and create a set of circular apertures with radius r=4:
Once created, you can use the apertures to extract sums, etc. as per https://photutils.readthedocs.io/en/stable/aperture.html#performing-aperture-photometry: