Coverage for python/lsst/sims/photUtils/LSSTdefaults.py : 53%

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""" This class exists to store default values of seeing, m5, and gamma taken from the over view paper (arXiv 0805.2366, Table 2, 29 August 2014 version) """
# Standard FWHMeffective in arcseconds self._FWHMeff = {'u':0.92, 'g':0.87, 'r':0.83, 'i':0.80, 'z':0.78, 'y':0.76} # Expected effective wavelength for throughput curves, in nanometers self._effwavelen = {'u':367.0, 'g':482.5, 'r':622.2, 'i':754.5, 'z':869.1, 'y':971.0} # Expected m5 depths (using FWHMeffective + dark sky + X=1.2 atmosphere + throughput curves) self._m5 = {'u':23.68, 'g':24.89, 'r':24.43, 'i':24.00, 'z':24.45, 'y':22.60} self._gamma = {'u':0.037, 'g':0.038, 'r':0.039, 'i':0.039, 'z':0.040, 'y':0.040}
""" From arXiv 0805.2366 (Table 2):
Typical 5-sigma depth for point sources at zenith, assuming exposure time of 2 x 15 seconds and observing conditions as listed. Calculated using $SYSENG_THROUGHPUT curves as of 11/25/2015, using $SYSENG_THROUGHPUT/python/calcM5.py
@param [in] the name of a filter i.e. 'u', 'g', 'r', 'i', 'z', or 'y'
@param [out] the corresponding m5 value """ return self._m5[tag]
""" From arXiv 0805.2366 XXX version (Table 2):
The expected FWHMeff in arcseconds. This is the width of a single gaussian which produces the appropriate number of effective pixels in the PSF (thus 'FWHMeff'). This is the value to use for calculating Neffective, when Neffective assumes a single gaussian. It can be converted to a geometric FWHM (equivalent to the approximate value which would be measured across a van Karmen PSF profile) using SignalToNoise.FWHMeff2FWHMgeom.
@param [in] the name of a filter i.e. 'u', 'g', 'r', 'i', 'z', or 'y'
@param [out] the corresponding FWHMeff """
return self._FWHMeff[tag]
""" From the throughput curves in syseng_throughputs, calculated by $SYSENG_THROUGHPUTS/python/effectiveWavelen.py as of 11/25/2015. """ return self._effwavelen[tag]
""" See Table 2 and Equaiton 5 of arXiv 0805.2366 29 August 2014 version.
@param [in] the name of a filter i.e. 'u', 'g', 'r', 'i', 'z', or 'y'
@param [out] the corresponding value of gamma as defined in the reference above """
return self._gamma[tag] |