diff options
| -rw-r--r-- | fg21sim/extragalactic/clusters/main.py | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/fg21sim/extragalactic/clusters/main.py b/fg21sim/extragalactic/clusters/main.py index 94a3288..610e60b 100644 --- a/fg21sim/extragalactic/clusters/main.py +++ b/fg21sim/extragalactic/clusters/main.py @@ -29,6 +29,7 @@ from .halo import RadioHalo from ...share import CONFIGS, COSMO from ...utils.io import dataframe_to_csv, pickle_dump from ...utils.ds import dictlist_to_dataframe +from ...utils.convert import JyPerPix_to_K from ...sky import get_sky from . import helper @@ -364,6 +365,51 @@ class GalaxyClusters: self._preprocessed = True + def simulate_frequency(self, freqidx): + """ + Simulate the superimposed radio halos image at frequency (by + frequency index) based on the above simulated halo templates. + + Parameters + ---------- + freqidx : int + The index of the frequency in the ``self.frequencies`` where + to simulate the radio halos image. + + Returns + ------- + sky : `~fg21sim.sky.SkyPatch` + The simulated sky image of radio halos as a new sky instance. + """ + freq = self.frequencies[freqidx] + logger.info("Simulating radio halo map at %.2f [MHz] ..." % freq) + sky = self.sky.copy() + sky.frequency = freq + # Conversion factor for [Jy/pixel] to [K] + JyPP2K = JyPerPix_to_K(freq, sky.pixelsize) + + for hdict in self.halos: + center = (hdict["lon"], hdict["lat"]) + template = hdict["template"] # normalized to have mean of 1 + Npix = template.size + flux = hdict["flux[%d]" % freqidx] # [Jy] + Tmean = (flux/Npix) * JyPP2K # [K] + Timg = Tmean * template # [K] + sky.add(Timg, center=center) + + return sky + + def simulate(self): + """ + Simulate the sky images of radio halos at each frequency. + """ + logger.info("Simulating {name} ...".format(name=self.name)) + for idx, freq in enumerate(self.frequencies): + sky = self.simulate_frequency(freqidx=idx) + outfile = self._outfilepath(frequency=freq) + sky.write(outfile) + logger.info("Done simulate {name}!".format(name=self.name)) + def postprocess(self): """ Do some necessary post-simulation operations. |