LSSTdefaults

class rubin_sim.phot_utils.LSSTdefaults

Bases: object

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)

Methods Summary

effwavelen(tag)	From the throughput curves in syseng_throughputs, calculated by $SYSENG_THROUGHPUTS/python/effectiveWavelen.py as of 11/25/2015.
fwhm_eff(tag)	From arXiv 0805.2366 XXX version (Table 2):
gamma(tag)	See Table 2 and Equaiton 5 of arXiv 0805.2366 29 August 2014 version.
m5(tag)	From arXiv 0805.2366 (Table 2):

Methods Documentation

effwavelen(tag)

From the throughput curves in syseng_throughputs, calculated by $SYSENG_THROUGHPUTS/python/effectiveWavelen.py as of 11/25/2015.

fwhm_eff(tag)

From arXiv 0805.2366 XXX version (Table 2):

The expected fwhm_eff in arcseconds. This is the width of a single gaussian which produces the appropriate number of effective pixels in the PSF (thus ‘fwhm_eff’). 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.fwhm_eff2FWHMgeom.

@param [in] the name of a filter i.e. ‘u’, ‘g’, ‘r’, ‘i’, ‘z’, or ‘y’

@param [out] the corresponding fwhm_eff

gamma(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

m5(tag)

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