Photometric redshifts for quasars from WISE-PS1-STRM

Photometric redshift estimations for quasars

In this repository we publish our photometric redshift catalogue of quasar candidates found in the cross-matched catalogue of the WISE All-Sky and PS1 3π DR2 sky surveys. Altogether there are 4,849,607 quasars in the catalog from which 2,879,273 are covered by our training set. When using this data please cite our work
https://doi.org/10.48550/arXiv.2206.01440. Below you can find the description of each column:

objID_PS1: object id in the PanSTARRS DR2 catalogue

raMean: rectascension of the object

decMean: declination of the object

w1mpro: PSF profile-fitting magnitude measured in WISE W1 filter

w1sigmpro: error estimation of w1mpro

w1mag: aperture magnitude related to 8.25" radius circular apertures measured in WISE W1 filter

w1sigm: error estimation of w1mag

w2mpro: PSF profile-fitting magnitude measured in WISE W2 filter

w2sigmpro: error estimation of w2mpro

w2mag: aperture magnitude related to 8.25" radius circular apertures measured in WISE W2 filter

w2sigm: error estimation of w2mag

gFPSFMag: PSF profile-fitting magnitude measured in PS1 g filter

gFPSFMagErr: error estimation of gFPSFMag

rFPSFMag: PSF profile-fitting magnitude measured in PS1 r filter

rFPSFMagErr: error estimation of rFPSFMag

iFPSFMag: PSF profile-fitting magnitude measured in PS1 i filter

iFPSFMagErr: error estimation of iFPSFMag

zFPSFMag: PSF profile-fitting magnitude measured in PS1 z filter

zFPSFMagErr: error estimation of zFPSFMag

yFPSFMag: PSF profile-fitting magnitude measured in PS1 y filter

yFPSFMagErr: error estimation of yFPSFMag

gFKronMag: Kron magnitude measured in PS1 g filter

gFKronMagErr: error estimation of gFKronMag

rFKronMag: Kron magnitude measured in PS1 r filter

rFKronMagErr: error estimation of rFKronMag

iFKronMag: Kron magnitude measured in PS1 i filter

iFKronMagErr: error estimation of iFKronMag

zFKronMag: Kron magnitude measured in PS1 z filter

zFKronMagErr: error estimation of zFKronMag

yFKronMag: Kron magnitude measured in PS1 y filter

yFKronMagErr: error estimation of yFKronMag

EBV_PS1: E(B-V) dust extinction values

EXT: flag denoting an object being extrapolated or not in the 12-dimensional color index space. It is 1 if the object is extrapolated and 0 if not.

DIST: average distance measured between the inference data points and their spectroscopic neighbors in the 12-dimensional color index space.

z_pred: photometric redshift estimation (predicted from color indices)

z_pred_std: uncertainty of z_pred

spectroz: spectroscopic redshift of the object if available and -999 otherwise

EXT2: flag denoting an object being extrapolated or not in the 13-dimensional color index+magnitude space. It is 1 if the object is extrapolated and 0 if not.

DIST2: average distance measured between the inference data points and their spectroscopic neighbors in the 13-dimensional color index+magnitude space.

z_pred2: photometric redshift estimation (predicted from color indices+magnitude)

z_pred_std2: uncertainty of z_pred2