Research Note

T-PHOT version 2.0: Improved algorithms for background subtraction, local convolution, kernel registration, and new options

¹ INAF–Osservatorio Astronomico di Roma, via Frascati 33, 00078 Monte Porzio Catone ( RM), Italy
e-mail: emiliano.merlin@oa-roma.inaf.it
² SUPA (Scottish Universities Physics Alliance), Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, EH9 3HJ, UK
³ Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
⁴ Laboratoire AIM-Paris-Saclay, CEA/DSM/Irfu – CNRS – Université Paris Diderot, CEA-Saclay, pt courrier 131, 91191 Gif-sur-Yvette, France
⁵ Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l’Université, 67000 Strasbourg, France

Received: 20 April 2016
Accepted: 30 August 2016

Abstract

Aims. We present the new release – version 2.0 – of t-phot, a publicly available software package developed to perform PSF-matched, prior-based, multiwavelength deconfusion photometry of extragalactic fields.

Methods. New features included in the code are presented and discussed: background estimation, fitting using position dependent kernels, flux prioring, diagnostical statistics on the residual image, exclusion of selected sources from the model and residual images, and individual registration of fitted objects.

Results. The new options improve on the performance of the code, allowing for more accurate results and providing useful aids for diagnostics.