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jzuhone / pyxsim

Simulating X-ray observations from astrophysical sources.
http://hea-www.cfa.harvard.edu/~jzuhone/pyxsim
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Photon generating outside the specified area #18

Closed tekkamanmaverick closed 3 years ago

tekkamanmaverick commented 5 years ago

Hi John,

I use ds.sphere to generate photons in the specified area of illustris-1. But I find the region where the photons are generated is far beyond expected. I get the event data (RA, Dec) from the phlist.fits and draw a cross though the region covers the fov.

jzuhone commented 5 years ago

I’ll have to see a script and I’ll need to see a picture of what you’re describing

tekkamanmaverick commented 5 years ago

import numpy as np import matplotlib as mpl import matplotlib.pyplot as plt from astropy.io import fits

hdu = fits.open('snap_131_sp_phlist.fits')

E = hdu['PHLIST'].data['ENERGY'] RA = hdu['PHLIST'].data['RA'] DEC = hdu['PHLIST'].data['DEC']

p = plt.scatter(RA,DEC,c=E)

picture https://github.com/tekkamanmaverick/symphony/blob/master/cross.png

jzuhone commented 3 years ago

Sorry that this never got resolved. It looks like you were straddling a periodic boundary perhaps, but not sure. Please reopen if necessary.