Open AccessObservations of the Hubble Deep Field South with the Infrared Space Observatory – I. Observations, data reduction and mid‐infrared source counts
Author(s) -
Oliver Seb,
Mann Robert G.,
Carballo Ruth,
Franceschini Alberto,
RowanRobinson Michael,
Kontizas Maria,
Dapergolas Anastasios,
Kontizas Evanghelos,
Verma Aprajita,
Elbaz David,
Luigi Granato Gian,
Silva Laura,
Rigopoulou Dimitra,
Ignacio GonzalezSerrano J.,
Serjeant Steve,
Efstathiou Andreas,
Van Der Werf Paul P.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05309.x
Subject(s) - physics , hubble deep field south , astrometry , astrophysics , galaxy , infrared , hubble deep field , stars , source counts , radius , astronomy , data reduction , observatory , space observatory , population , hubble space telescope , demography , computer security , redshift , sociology , computer science , data mining
We present results from a deep mid‐infrared survey of the Hubble Deep Field South (HDF‐S) region performed at 6.7 and 15 μm with the ISOCAM instrument on board the Infrared Space Observatory ( ISO ). The final map in each band was constructed by the co‐addition of four independent rasters, registered using bright sources securely detected in all rasters, with the absolute astrometry being defined by a radio source detected at both 6.7 and 15 μm. We sought detections of bright sources in a circular region of radius 2.5 arcmin at the centre of each map, in a manner that simulations indicated would produce highly reliable and complete source catalogues using simple selection criteria. Merging source lists in the two bands yielded a catalogue of 35 distinct sources, which we calibrated photometrically using photospheric models of late‐type stars detected in our data. We present extragalactic source count results in both bands, and discuss the constraints that they impose on models of galaxy evolution, given the volume of space sampled by this galaxy population.