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相关论文: COMPTEL Time-Averaged All-Sky Point Source Analysi…

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It is important to correctly subtract point sources from radio-interferometric data in order to measure the power spectrum of diffuse radiation like the Galactic synchrotron or the Epoch of Reionization 21-cm signal. It is computationally…

宇宙学与河外天体物理 · 物理学 2016-08-29 Samir Choudhuri , Somnath Bharadwaj , Nirupam Roy , Abhik Ghosh , Sk. Saiyad Ali

We present complimentary techniques to find emission-line targets and measure their properties in a semi-automated fashion from grism observations obtained with the Advanced Camera for Surveys aboard the Hubble Space Telescope. The first…

After the first nine years of INTEGRAL operational life, the discovery of new sources and source types, a large fraction of which are highly transient or highly absorbed, is certainly one of the most compelling results and legacies of…

高能天体物理现象 · 物理学 2019-08-14 Mariateresa Fiocchi , Lorenzo Natalucci

We use the Atacama Large sub/Millimetre Array (ALMA) to efficiently observe spectral lines across Bands 3, 4, 5, 6, 7, and 8 at high-resolution (0.5" - 0.1") for 16 bright southern Herschel sources at $1.5 < z < 4.2$. With only six and a…

All-sky monitors can measure the fluxes of astrophysical sources by measuring the changes in observed counts as the source is occulted by the Earth. Such measurements have typically been carried out by all-sky monitors like…

天体物理仪器与方法 · 物理学 2021-08-10 Akshat Singhal , Rahul Srinivasan , Varun Bhalerao , Dipankar Bhattacharya , A. R. Rao , Santosh Vadawale

In this contribution, we describe the applied methods to construct a 24 micron based point source catalog derived from the image data of the MIPSGAL 24 micron Galactic Plane Survey and the corresponding data products. The high quality…

太阳与恒星天体物理 · 物理学 2015-06-23 Robert A. Gutermuth , Mark Heyer

We present results of an all-sky hard X-ray survey based on almost four years of observations with the IBIS telescope on board the INTEGRAL observatory. The dead time-corrected exposure of the survey is ~33 Ms. Approximately 12% and 80% of…

天体物理学 · 物理学 2009-11-13 R. Krivonos , M. Revnivtsev , A. Lutovinov , S. Sazonov , E. Churazov , R. Sunyaev

We investigated the MeV properties of 173 unidentified or only tentatively identified EGRET sources listed in the third EGRET catalogue, by analyzing the simultaneously collected COMPTEL MeV data for each individual source. The sources can…

天体物理学 · 物理学 2009-11-10 S. Zhang , W. Collmar , W. Hermsen , V. Schönfelder

Seven years of successful observations of the sky have been completed within the INTEGRAL mission, in the transition regime between X-rays and gamma-rays from ~10-8000 keV. Initially-agreed mission goals have been pursued, and both…

高能天体物理现象 · 物理学 2010-05-10 Roland Diehl

The ASCA satellite made 107 pointing observations on a 5 x 5 deg^2 region around the center of our Milky Way Galaxy (the Galactic Center) from 1993 to 1999. In the X-ray images of the 0.7--3 keV or 3--10 keV bands, we found 52 point sources…

天体物理学 · 物理学 2016-08-30 Masaaki Sakano , Katsuji Koyama , Hiroshi Murakami , Yoshitomo Maeda , Shigeo Yamauchi

We present the calibration procedures and validation of source measurement with the data of the Commensal Radio Astronomy FAST Survey (CRAFTS) for \HI intensity mapping by the Five-hundred-meter Aperture Spherical Radio Telescope (FAST).…

Results of analysis of RXTE observations of strongly absorbed X-ray sources IGR J16318-4848 and IGR J16358-4726 are presented. Careful subtraction of Galactic ridge emission contribution to the observed spectra of RXTE/PCA allowed us to…

天体物理学 · 物理学 2009-11-07 M. Revnivtsev

(abridged) We present a catalog of 2357 point sources detected during 590 ks of Chandra observations of the 17-by-17 arcminute field around Sgr A*. This field encompasses a physical area of 40 by 40 pc at a distance of 8 kpc. The…

Context: This is the second of a series of papers presenting VLBI observations of the 293 Caltech-Jodrell Bank Flat-Spectrum (hereafter CJF) sources and their analysis. Aims: To obtain a consistent motion dataset large enough to allow the…

Context: As more and more data are collected by cosmic ray experiments such as the Pierre Auger Observatory and Telescope Array (TA), the search for the sources of the Ultra High Energy Cosmic Rays (UHECR) continues. Already we have some…

高能天体物理现象 · 物理学 2011-12-06 Laurentiu I. Caramete , Oana Tascau , Peter L. Biermann , Todor Stanev

Air sensor networks provide hyperlocal, high temporal resolution data on multiple pollutants that can support credible identification of common pollution sources. Source apportionment using least squares-based non-negative matrix…

The INTEGRAL Optical Monitoring Camera, OMC, has detected many high energy sources. We have obtained V-band fluxes and light curves for their counterparts. In the cases of previously unknown counterparts, we have searched for characteristic…

天体物理学 · 物理学 2008-10-21 D. Risquez , A. Domingo , J. M. Mas-Hesse , E. Kuulkers

We investigate the scientific impact of the Wide Field X-ray Telescope mission. We present simulated images and spectra of X-ray sources as observed from the three surveys planned for the nominal 5-year WFXT lifetime. The goal of these…

宇宙学与河外天体物理 · 物理学 2010-11-01 P. Tozzi , J. Santos , H. Yu , A. Bignamini , P. Rosati , S. Borgani , S. Campana , P. Conconi , R. Gilli , M. Paolillo , A. Ptak , the WFXT Team

Using the Chandra Advanced CCD Imaging Spectrometer Imaging array (ACIS-I), we have carried out a deep hard X-ray observation of the Galactic plane region at (l,b) ~ (28.5, 0.0), where no discrete X-ray source had been reported previously.…