The shear power spectrum from the COMBO-17 survey
نویسندگان
چکیده
منابع مشابه
The shear power spectrum from the COMBO-17 survey
We perform a statistical weak lensing or “cosmic shear” analysis of the COMBO-17 survey – a unique dataset with shear quality R-band imaging and accurate photometric redshift estimates (σz = 0.05) for ∼ 90% of galaxies to mR ≤ 24.0. We undertake a full maximum likelihood analysis to measure directly from the data the weak lensing power spectra, C l , C ββ l and C l in 5 band powers from l = 400...
متن کاملDeep R-band photometry of the Chandra Deep Field South from the COMBO-17 survey
We report on deep multi-color imaging (R5σ = 26.0) of the Chandra Deep Field South, obtained with the Wide Field Imager (WFI) at the MPG/ESO 2.2 m telescope on La Silla as part of the COMBO-17 survey. We include an overview of the COMBO-17 project and a detailed reduction scheme for WFI survey data. We discuss particular treatment necessary for accurate flatfielding of WFI images taken in the s...
متن کاملDeep BVR photometry of the Chandra Deep Field South from the COMBO-17 survey
We report on deep multi-color imaging (R5σ = 26) of the Chandra Deep Field South, obtained with the Wide Field Imager (WFI) at the MPG/ESO 2.2 m telescope on La Silla as part of the multi-color survey COMBO-17. As a result we present a catalogue of 63501 objects in a field measuring 31.′5 × 30′ with astrometry and BVR photometry. A sample of 37 variable objects is selected from two-epoch photom...
متن کاملsurvey on the rule of the due & hindering relying on the sheikh ansaris ideas
قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
15 صفحه اولPower spectrum from weak-shear data
We demonstrate that the aperture mass as a measure for cosmic shear closely approximates (to better than ≈ 5%) the scaled and shifted power spectrum of the projected mass density. This cosmological weak-lensing information can thus be used to directly infer the projected matter power spectrum with high accuracy. As an application, we show that aperturemass observations can be used to constrain ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2003
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2003.06237.x