Questions tagged [fits]
The fits tag has no usage guidance.
14
questions
1
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0answers
19 views
How to choose numeric precision when creating a file with STILTS?
I am using the STILTS command-line tools, popular in astronomical data processing, to merge many (~330k) .fits astronomic tables into 1 large table. I am doing this with the STILTS command in the ...
1
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0answers
58 views
How to quickly loop through many small fits files for data analysis?
I need to extract information from a few columns in ~20k different fits files with python. Each file is relatively small, ~0.2MB. I have been doing this so far with a loop and ...
1
vote
0answers
11 views
How to superimpose an optical image upon a radio contour image using AIPS?
I am using AIPS by NRAO. I am trying to overlay a radio contour image with an optical image in the r-band. From the cookbook I could not find the suitable command for it. Both are fits files pf course....
2
votes
0answers
30 views
Frame used for RGB cube in SAOImage
I have RGB FITS images with NAXIS=3 so I read them into SAOImage (ds9 8.2.1). I use this command line:
$ ds9 -rgbcube myimage.fits
Doing so, the window is split in ...
2
votes
0answers
31 views
healpix: creating isometric tiles for flat map of survey
I am currently tasked with creating a visual of a recently completed survey which is in HEALPix1 format. I am also required to use the DSS and Planck skymaps also in HEALPix, and would like to flatten ...
0
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0answers
35 views
.fits Files for Exoplanets
I am learning to use AstroImageJ software. And using this software to plot transit graph for Exoplanet orbiting the star. I want to know from where can we find the .fits file of target star ? I tried ...
2
votes
1answer
74 views
Finding galaxy spectra in SDSS Catalog by object name
I am looking to find galaxy spectra of early type elliptical galaxies in the SDSS catalog by the objects name. See: https://dr12.sdss.org/advancedSearch. I dont know how to find out the PLATEID of my ...
1
vote
1answer
375 views
working with stellar spectra in fits format in python
Hey I am new to working with astronomical data in Python. I wanted to start working with stellar spectra and I am having trouble with the data. To get a first look I just wanted to plot a spectra (...
4
votes
1answer
350 views
Algorithm to fit galaxies
Do you know of any other data analysis algorithm that fits 2-D analytic functions to galaxies and point sources directly to digital images, other than GALFIT? Especially to subtract lens light from ...
3
votes
0answers
191 views
Issues in dimensions and slicing while plotting contours over a FITS Image in Astronomical Plotting Library in python (APLpy)
I have been trying to plot the contours of a FITS image over itself in APLpy. The image was created in AIPS, and has dimensions (1024,1024,1,1), viz., right ascension (RA--SIN), declination (DEC--SIN),...
2
votes
0answers
22 views
superimpose borders of several FITS on the sky map
I have several FITS files with correct WCS info (as far as I know) and want to project them or preferably their borders only in the same sky projection, so it will be easy to understand an actual ...
1
vote
0answers
23 views
How can I create a mask for a fits image?
I need to create a mask of a fits image.
By this I mean that I want to create the image that covers all secondary objects from the original image except the one is in the center.
I have some routines ...
2
votes
2answers
90 views
How to invert fits headers order (primary/secondary)?
I have an image from Hubble telescope with two headers and this creates a problem because my program expects the NAXIS, NAXIS1, NAXIS2 in the first header, but in this image case, this info is in the ...
0
votes
1answer
669 views
How can I crop a fits file and get correct WCS header info without a new plate solve and WITHOUT USING PYTHON?
While my question is similar to this one, the suggestions offered there won't work for my specific situation. For over a month I've been trying to find software capable of this but it's been an ...
