Far-infrared detection limits – II. Probing confusion including source confusion
نویسندگان
چکیده
منابع مشابه
Far - IR Detection Limits − II . Probing Confusion Including Source Confusion
We present a comprehensive analysis for the determination of the confusion levels for the current and the next generation of far-infrared surveys assuming three different cosmological evolutionary scenarios. We include an extensive model for diffuse emission from infrared cirrus in order to derive absolute sensitivity levels taking into account the source confusion noise due to point sources, t...
متن کاملDetermination of confusion noise for far - infrared measurements ⋆
We present a detailed assessment of the far-infrared confusion noise imposed on measurements with the ISOPHOT far-infrared detectors and cameras aboard the ISO satellite. We provide confusion noise values for all measurement configurations and observing modes of ISOPHOT in the 90 µm ≤ λ ≤ 200 µm wavelength range. Based on these results we also give estimates for cirrus confusion noise levels at...
متن کاملFar-IR Detection Limits I: Sky Confusion Due to Galactic Cirrus
Fluctuations in the brightness of the background radiation can lead to confusion with real point sources. Such background emission confusion will be important for infrared observations with relatively large beam sizes since the amount of fluctuation tends to increase with angular scale. In order to quantitively assess the effect of the background emission on the detection of point sources for c...
متن کاملObservational limits to source confusion in the millimetre/submillimetre waveband
The first observations to detect a population of distant galaxies directly in the submillimetre waveband have recently been made using the new Submillimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT). The results indicate that a large number of distant galaxies are radiating strongly in this waveband. Here we discuss their significance for source confusion i...
متن کاملAstronomy and Astrophysics Sky Confusion Noise in the Far-infrared: Cirrus, Galaxies and the Cosmic Far–infrared Background
We examined the sky confusion noise in 40 sky regions by analysing 175 far-infrared (90–200 µm) maps obtained with ISOPHOT, the photometer on-board the Infrared Space Observatory. For cirrus fields with B > 5 MJysr −1 the formula based on IRAS data (Helou & Be-ichman, (1990)) predicts confusion noise values within a factor of 2 to our measurements. The dependence of the sky confusion noise on t...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2006
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2006.10285.x