Bibcode
Ibar, Edo; Ivison, R. J.; Cava, A.; Rodighiero, G.; Buttiglione, S.; Temi, P.; Frayer, D.; Fritz, J.; Leeuw, L.; Baes, M.; Rigby, E.; Verma, A.; Serjeant, S.; Müller, T.; Auld, R.; Dariush, A.; Dunne, L.; Eales, S.; Maddox, S.; Panuzzo, P.; Pascale, E.; Pohlen, M.; Smith, D.; de Zotti, G.; Vaccari, M.; Hopwood, R.; Cooray, A.; Burgarella, D.; Jarvis, M.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 409, Issue 1, pp. 38-47.
Advertised on:
11
2010
Número de citas
99
Número de citas referidas
95
Descripción
We describe the reduction of data taken with the PACS instrument on
board the Herschel Space Observatory in the Science Demonstration Phase
of the Herschel-ATLAS (H-ATLAS) survey, specifically data obtained for a
4 × 4 deg2 region using Herschel's fast-scan
(60arcsecs-1) parallel mode. We describe in detail a pipeline
for data reduction using customized procedures within HIPE from data
retrieval to the production of science-quality images. We found that the
standard procedure for removing cosmic ray glitches also removed parts
of bright sources and so implemented an effective two-stage process to
minimize these problems. The pronounced 1/f noise is removed from the
timelines using 3.4- and 2.5-arcmin boxcar high-pass filters at 100 and
160μm. Empirical measurements of the point spread function (PSF) are
used to determine the encircled energy fraction as a function of
aperture size. For the 100- and 160-μm bands, the effective PSFs are
~9 and ~13arcsec (FWHM), and the 90-per cent encircled energy radii are
13 and 18arcsec. Astrometric accuracy is good to <~2arcsec. The noise
in the final maps is correlated between neighbouring pixels and rather
higher than advertised prior to launch. For a pair of cross-scans, the
5σ point-source sensitivities are 125-165mJy for 9-13 arcsec
radius apertures at 100μm and 150-240mJy for 13-18 arcsec radius
apertures at 160μm.
Proyectos relacionados
![Project Image](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/Imagen%20IPF.jpg?h=d4e1102e&itok=L4wm7yFi)
Formación y Evolución de Galaxias: Observaciones Infrarrojas y en otras Longitudes de Onda
Este grupo desarrolla varios proyectos extragalácticos en diferentes rangos del espectro electromagnético utilizando satélites y telescopios en tierra para estudiar la evolución cosmológica de las galaxias y el origen de la actividad nuclear en galaxias activas. En el aspecto instrumental, el grupo forma parte del consorcio internacional que ha
Ismael
Pérez Fournon