MegaPipe: the MegaCam image stacking pipeline at the Canadian Astronomical Data Centre

Abstract

This paper describes the MegaPipe image processing pipeline at the Canadian Astronomical Data Centre. The pipeline combines multiple images from the MegaCam mosaic camera on CFHT and combines them into a single output image. MegaPipe takes as input detrended MegaCam images and does a careful astrometric and photometric calibration on them. The calibrated images are then resampled and combined into image stacks. The astrometric calibration of the output images is accurate to within 0.15 arcseconds relative to external reference frames and 0.04 arcseconds internally. The photometric calibration is good to within 0.03 magnitudes. The stacked images and catalogues derived from these images are available through the CADC website:

Data available at http://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/megapipe/index.html

References in corpus (3)

• The Type Ia Supernova Rate at z ~0.5 from the Supernova Legacy Survey
• Deep u*- and g-band Imaging of the Spitzer Space Telescope First Look Survey Field : Observations and Source Catalogs
• The CFHTLS Real Time Analysis System "Optically Selected GRB Afterglows"

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