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We present a far-infrared all-sky atlas from a sensitive all-sky survey using the Japanese $AKARI$ satellite. The survey covers $> 99$% of the sky in four photometric bands centred at 65 $\mu$m, 90 $\mu$m, 140 $\mu$m, and 160 $\mu$m with…

We present a new detection algorithm based on the wavelet transform for the analysis of high energy astronomical images. The wavelet transform, due to its multi-scale structure, is suited for the optimal detection of point-like as well as…

天体物理学 · 物理学 2009-10-31 Davide Lazzati , Sergio Campana , Piero Rosati , Maria Rosa Panzera , Gianpiero Tagliaferri

We present an initial analysis of the properties of the all-sky image obtained by the Far-Infrared Surveyor (FIS) onboard the AKARI satellite, at 65~$\mu$m (N60), 90~$\mu$m (WIDE-S), 140~$\mu$m (WIDE-L),and 160~$\mu$m (N160). Absolute flux…

We present a new pipeline utilizing machine learning for classifying short-duration features in raw time-ordered data (TOD) of cosmic microwave background survey observations. The pipeline, specifically designed for the Atacama Cosmology…

We present the properties of 11 $\mu$m selected sources detected in the early data of the North Ecliptic Pole Deep (NEP-Deep) Survey of AKARI. The data set covers 6 wavelength bands from 2.5 to 11 $\mu$m, with the exposure time of 10 ~ 20…

Far-infrared observations provide crucial data for the investigation and characterisation of the properties of dusty material in the Interstellar Medium (ISM), since most of its energy is emitted between ~100 and 200 um. We present the…

The planned Laser Interferometer Space Antenna (LISA) will detect gravitational wave signals from a wide range of sources. However, disentangling individual signals from the source-dominated data stream is a challenging problem and the…

广义相对论与量子宇宙学 · 物理学 2016-11-15 Jonathan R Gair , Gareth Jones

The north ecliptic pole (NEP) field is a natural deep field location for many satellite observations. It has been targeted manytimes since it was surveyed by the AKARI space telescope with its unique wavelength coverage from the near- to…

We present the Brera Multi-scale Wavelet ROSAT HRI source catalogue (BMW-HRI) derived from all ROSAT HRI pointed observations with exposure time longer than 100 s available in the ROSAT public archives. The data were analyzed automatically…

天体物理学 · 物理学 2008-11-26 M. R. Panzera , S. Campana , S. Covino , D. Lazzati , R. P. Mignani , A. Moretti , G. Tagliaferri

Applying basic physical principles to recent observational results, we derive upper and lower limits on microwave anisotropy from point sources over the range of frequencies 10-1000 GHz. We examine the level of noise in the observations as…

天体物理学 · 物理学 2007-05-23 Eric Gawiser , Andrew Jaffe , Joseph Silk

The radio spectral index is a powerful probe for classifying cosmic radio sources and understanding the origin of the radio emission. Combining data at 147 MHz and 1.4 GHz from the TIFR GMRT Sky Survey (TGSS) and the NRAO VLA Sky Survey…

天体物理仪器与方法 · 物理学 2018-01-10 F. de Gasperin , H. T. Intema , D. A. Frail

We present the first full release of a survey of the 150 MHz radio sky, observed with the Giant Metrewave Radio Telescope between April 2010 and March 2012 as part of the TGSS project. Aimed at producing a reliable compact source survey,…

宇宙学与河外天体物理 · 物理学 2017-02-08 H. T. Intema , P. Jagannathan , K. P. Mooley , D. A. Frail

We report the observations of 12 globular clusters with the AKARI/FIS. Our goal is to search for emission from the cold dust within clusters. We detect diffuse emissions toward NGC 6402 and 2808, but the IRAS 100-micron maps show the…

天体物理学 · 物理学 2017-01-18 N. Matsunaga , H. Mito , Y. Nakada , H. Fukushi , T. Tanabé , Y. Ita , H. Izumiura , M. Matsuura , T. Ueta , I. Yamamura

A method is derived for the quantitative analysis of signals that are composed of superpositions of isolated, time-localized "events". Here these events are taken to be well represented as rescaled and phase-rotated versions of generalized…

统计方法学 · 统计学 2017-04-20 J. M. Lilly

We use all COMPTEL data from the beginning of the CGRO mission (April '91) up to the end of CGRO Cycle 6 (November '97) to carry out all-sky point source analyses in the four standard COMPTEL energy bands for different time periods. We…

天体物理学 · 物理学 2009-10-31 W. Collmar , V. Schoenfelder , A. W. Strong , H. Bloemen , W. Hermsen , M. McConnell , J. Ryan , K. Bennett

Using the Chandra ACIS-I instruments, we have carried out a deep X-ray observation on the Galactic plane region at (l,b) ~ (28.5, 0.0), where no discrete X-ray sources have been known previously. We have detected, as well as strong diffuse…

We present herein galaxy number counts of the nine bands in the 2-24 micron range on the basis of the AKARI North Ecliptic Pole (NEP) surveys. The number counts are derived from NEP-deep and NEP-wide surveys, which cover areas of 0.5 and…

星系天体物理 · 物理学 2015-06-22 K. Murata , C. P. Pearson , T. Goto , S. J. Kim , H. Matsuhara , T. Wada

We present here results on the source location accuracy of the INTEGRAL IBIS/ISGRI coded mask telescope, based on ten years of INTEGRAL data and on recent developments in the data analysis procedures. Data were selected and processed with…

天体物理仪器与方法 · 物理学 2013-02-28 A. Gros , A. Goldwurm , S. Soldi , D. Gotz , I. Caballero , F. Mattana , J. A. Zurita Heras

The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a radio continuum survey at 72-231 MHz of the whole sky south of declination +30 deg, carried out with the Murchison Widefield Array (MWA). In this paper, we derive source counts…

星系天体物理 · 物理学 2019-02-20 T. M. O. Franzen , T. Vernstrom , C. A. Jackson , N. Hurley-Walker , R. D. Ekers , G. Heald , N. Seymour , S. V. White

The WARPS cluster survey is based on the ROSAT PSPC archive of pointed observations. It includes extended X-ray sources, detected with the Voronoi Tessellation and Percolation algorithm (VTP), and point-like X-ray sources with non-stellar…

天体物理学 · 物理学 2007-05-23 L. R. Jones , C. A. Scharf , E. Perlman , H. Ebeling , G. Wegner , M. Malkan