sdapy.snerun.snobject.get_fp_ztf

snobject.get_fp_ztf(seeing_cut=7.0, **kwargs)

Parse and add local ZTF forced photometic data to snobject.lc.

Parameters

seeing_cutfloat

there’s a seeing column in ztf forced photometry file, which can be used to remove epochs with quite poor observing conditions.

zpfloat

zeropoint to convert flux to magnitude. zp = 23.9 for micro Jansky to AB mag zp = 48.6 for ergs/s/cm2/Hz to AB mag e.g. mab = -2.5 * log10(fv[Jy]/3631) = -2.5 * log10(fv[mJy]) + 2.5*log10(3631*1e6)

snrtfloat

SNR threshold to distinguish detection/limit

See also

snobject.add_lc, snobject.add_flux, snobject.add_mag, snobject.query_fp_ztf

Notes

• Download ZTF forced photometry in advance, with snobject.query_fp_ztf.

• The ZTF forced photometry service is open public, however in order to use it, one need to register first. And the user information should be put correctly in the auth.txt file.

• The ZTF forced photometry file will be read as pandas.dataframe, and added to snobject.lc with snobject.add_lc. Then snobject.add_flux or snobject.add_mag will be called if mag or flux items are missing.