Questions tagged [fits-header]

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Cannot plot Kepler FITS files with topcat in Windows

This is a continuation of my earlier question here. I was able to find Kepler data. Now I wanted to plot the data using Topcat. But when I tried to plot the data, I received error. Below is the error ...
4
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0answers
28 views

Converting pixel coordinates to world relative offset coordinates with astropy for plotting

Intro So, I'm having some trouble trying to figure out how I can convert pixel coordinates to world offset coordinates with the center lying on the source coordinates. I would include my fits file ...
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0answers
22 views

Millisecond pulsar timing analysis on fits file

I'm amateur to astronomy and I just want to calculate the spinning period of a pulsar (for example MAXI J0911-655) from lightcurve of it. I found Xamin then I collected data for MAXI J0911-655. Using ...
2
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1answer
38 views

Align multiple fits images without WCS for future aperture photometry analysis

Recently I have got a bunch of raw fits images (2048x2048 pixels) of the same sky region without WCS to process in iraf. However, those images are not well-aligned. There would be around 4~5 pixels' ...
1
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1answer
34 views

CoRoT FITS files read error

I downloaded fits file using wget script from https://exoplanetarchive.ipac.caltech.edu/docs/datasethelp/ETSS_CoRoT.html I am not able to view the file. I tried atsromagic and DS9 . After File->Open ...
3
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1answer
73 views

Fits file re-alignment

I would like to re-align an image using a reference image (taken from GAIA). I am aware of the software Koords developed by the Karma team: https://www.atnf.csiro.au/computing/software/karma/ ...
1
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1answer
35 views

In sky surveys, what does inverse variation really mean? How do we use inverse variation to remove noise?

I am trying to work on data from a .fits file and it has an IVAR header. How can I use inverse variation information along with the actual signal data to get better results or reduce noise?
2
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2answers
602 views

Python: Find brightest pixel in fits-file and ignore brighter artefacts

I have 4000 fits-files images from SPITZER, each containing the same star over a time period. Each image is a photmetry cube of 32 pixel * 32 pixel * 64 consequent time frames. I need to look through ...
4
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0answers
206 views

Generate probability skymap

I am trying to generate skymaps for a set of Fermi GBM triggers, containing the probability that a trigger originated in a given part of the sky. For each trigger, I have access to the RA, dec, error ...
2
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2answers
394 views

Converting FITS (NuSTAR) coordinates to WCS

I'm trying to convert some pixel coordinates I have into WCS coordinates, ideally into a WCS region for use in some further analysis. So far I've been able to load and parse a NuSTAR FITS file, do ...
1
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2answers
147 views

Problems with FITS headers

I'm working with some NEOWISE images that seem to have incomplete header tags. I've been advised by the SAO (because I'm using DS9 to view them) that I have "a partial PC matrix defined, yet it does ...