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The Very Large Array (VLA) Low-frequency Sky Survey (VLSS) has imaged 95% of the 3*pi sr of sky north of declination = -30 degrees at a frequency of 74 MHz (4 meter wavelength). The resolution is 80" (FWHM) throughout, and the typical RMS…

The ANTARES collaboration reported the results of a search for point-like neutrino sources using data taken in the period 2007-2010. An unbinned maximum likelihood based all-sky search yielded a cluster of 9 (5) events within a cone of 3…

高能天体物理现象 · 物理学 2019-08-15 F. Schüssler , P. Brun , R. C. G Chaves , J. -F. Glicenstein , K. Kosack , E. Moulin , B. Peyaud , D. Wouters , T. Stolarczyk , B. Vallage

The INTEGRAL observatory has been performing a deep survey of the Galactic central radian since 2003, with the goal of both extracting a catalog of sources and gaining insight into the Galactic diffuse emission. This paper concentrates on…

天体物理学 · 物理学 2016-08-30 L. Bouchet , J. P. Roques , P. Mandrou , A. Strong , R. Diehl , F. Lebrun , R. Terrier

Compact, steep-spectrum radio sources are key tracers of exotic astrophysical objects such as pulsars and high-redshift radio galaxies. All-sky radio surveys at different frequencies, like the TIFR-GMRT Sky Survey (TGSS) and the NRAO VLA…

星系天体物理 · 物理学 2026-04-07 Rajat Shinde , Yogesh Maan , Apurba Bera

We report on the detection of source noise in the time domain at 162MHz with the Murchison Widefield Array. During the observation the flux of our target source Virgo A (M87) contributes only $\sim$1\% to the total power detected by any…

天体物理仪器与方法 · 物理学 2021-04-14 John Morgan , Ron Ekers

The S-band Polarisation All-Sky Survey (S-PASS) has observed the entire southern sky using the 64-metre Parkes radio telescope at 2.3GHz with an effective bandwidth of 184MHz. The surveyed sky area covers all declinations $\delta\leq…

We describe the method used to detect sources for the Herschel-ATLAS survey. The method is to filter the individual bands using a matched filter, based on the point-spread function (PSF) and confusion noise, and then form the inverse…

天体物理仪器与方法 · 物理学 2020-02-26 S. J. Maddox , L. Dunne

Mid-infrared imaging at resolutions of 300 mas of the central kpc region of 13 nearby, well-known active galaxies is presented. The bulk of the mid-IR emission is concentrated on an unresolved central source within a size of less than 5 to…

宇宙学与河外天体物理 · 物理学 2015-05-14 J. Reunanen , M. A. Prieto , R. Siebenmorgen

We present the optical identification of mid-IR and radio sources detected in the European Large Area ISO Survey (ELAIS) areas N1 and N2. Using the r' band optical data from the Wide Field Survey we apply a likelihood ratio method to search…

We investigated whether "velocity excess" in circumstellar maser lines can diagnose the earliest evolutionary phases of Water Fountains (WFs). Here we define "velocity excess" as maser emission (e.g., H$_2$O 22.235 GHz or OH 1665/1667 MHz)…

太阳与恒星天体物理 · 物理学 2025-12-19 Jia-Yong Xie , Jun-ichi Nakashima , Yong Zhang

We present an analysis of the L 1641 outflow region using broad-band and narrow-band imaging data at mid-infrared wavelengths from ISOCAM. We detect a total of 34 sources in the $7.65^{\prime}$ x $8.40^{\prime}$ region covered by the…

天体物理学 · 物理学 2009-11-10 Babar Ali , Alberto Noriega-Crespo

AKARI/IRC has a capability of the slit-less spectroscopy in the mid-infrared (5--13 $\mu$m) over a 10 arcmin$\times$10 arcmin area with a spectral resolution of 50, which is suitable for serendipitous surveys. The data reduction is,…

We present data products from the 300 ks Chandra survey in the AKARI North Ecliptic Pole (NEP) deep field. This field has a unique set of 9-band infrared photometry covering 2-24 micron from the AKARI Infrared Camera, including mid-infrared…

高能天体物理现象 · 物理学 2015-03-25 M. Krumpe , T. Miyaji , H. Brunner , H. Hanami , T. Ishigaki , T. Takagi , A. G. Markowitz , T. Goto , M. A. Malkan , H. Matsuhara , C. Pearson , Y. Ueda , T. Wada

We present in catalog form the optical identifications for objects from the first phase of the Wide Angle ROSAT Pointed Survey (WARPS). WARPS is a serendipitous survey of relatively deep, pointed ROSAT observations for clusters of galaxies.…

天体物理学 · 物理学 2009-11-07 E. S. Perlman , D. J. Horner , L. R. Jones , C. A. Scharf , H. Ebeling , G. Wegner , M. Malkan

The optimal source-finding strategy for linear polarization data is an unsolved problem, with many inhibitive factors imposed by the technically-challenging nature of polarization observations. Such an algorithm is essential for Square…

Unsupervised source separation involves unraveling an unknown set of source signals recorded through a mixing operator, with limited prior knowledge about the sources, and only access to a dataset of signal mixtures. This problem is…

In the first TABASCAL paper we showed how to calibrate in the presence of Radio Frequency Interference (RFI) sources by simultaneously isolating the trajectories and signals of the RFI sources. Here we show that we can accurately remove RFI…

天体物理仪器与方法 · 物理学 2025-10-01 Chris Finlay , Bruce A. Bassett , Martin Kunz , Nadeem Oozeer

In collaboration with the Observatories of Palermo and Rome and the SAX-SDC we are constructing a multi-site interactive archive system featuring specific analysis tools. In this context we developed a detection algorithm based on the…

天体物理学 · 物理学 2007-05-23 M. R. Panzera , S. Campana , S. Covino , L. Guzzo , G. L. Israel , D. Lazzati , R. Mignani , A. Moretti , G. Tagliaferri

Source finding is one of the most challenging tasks in upcoming radio continuum surveys with SKA precursors, such as the Evolutionary Map of the Universe (EMU) survey of the Australian SKA Pathfinder (ASKAP) telescope. The resolution,…

AKARI (formerly ASTRO-F) is an infrared space telescope designed for an all-sky survey at 10-180 (mu)m, and deep pointed surveys of selected areas at 2-180 (mu)m. The deep pointed surveys with AKARI will significantly advance our…