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The $AKARI$ infrared (IR) space telescope conducted two surveys (Deep and Wide) in the North Ecliptic Pole (NEP) field to find more than 100,000 IR sources using its Infrared Camera (IRC). IRC's 9 filters, which cover wavebands from 2 to 24…

The triple radio source detected in association with the luminous infrared source IRAS 16547-4247 has previously been studied with high angular resolution and high sensitivity with the Very Large Array (VLA) at 3.6-cm wavelength. In this…

There is significant scientific value to be gained from combining AKARI fluxes with data at other far-IR wavelengths from the IRAS and Herschel missions. To be able to do this we must ensure that there are no systematic differences between…

We present the first measurement of the angular two-point correlation function for AKARI 90-$\mu$m point sources, detected outside of the Milky Way plane and other regions characterized by high Galactic extinction, and categorized as…

宇宙学与河外天体物理 · 物理学 2012-10-10 A. Pollo , T. T. Takeuchi , T. L. Suzuki , S. Oyabu

A VLA Sky Survey of the extragalactic sky at S band (2-4 GHz) with polarization information can uniquely probe the magneto-ionic medium in a wide range of astrophysical environments over cosmic time. For a shallow all-sky survey, we expect…

We present the optical and infrared properties of a sample of 24 radio transient sources discovered in the Very Large Array Sky Survey (VLASS). Previous studies of their radio emission showed that these sources resemble young…

高能天体物理现象 · 物理学 2025-10-03 M. Kunert-Bajraszewska , D. Kozieł-Wierzbowska , D. Stern , A. Krauze , N. Zafar , T. Connor , M. J. Graham

Aims: We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and…

天体物理学 · 物理学 2009-11-13 M. De Becker , G. Rauw , J. M. Pittard , H. Sana , I. R. Stevens , G. E. Romero

We present a search for transient radio sources on timescales of 2 to 9 yr at 150 MHz. This search is conducted by comparing the first Alternative Data Release of the TIFR GMRT Sky Survey (TGSS ADR1) and the second data release of the LOFAR…

We present the results of the analysis of multiwavelength Spectral Energy Distributions (SEDs) of far-infrared galaxies detected in the AKARI Deep Field-South (ADF--S) Survey. The analysis uses a carefully selected sample of 186 sources…

星系天体物理 · 物理学 2013-11-01 K. Malek , A. Pollo , T. T. Takeuchi , E. Giovannoli , V. Buat , D. Burgarella , M. Malkan , A. Kurek

Accurate instrumental bandpass corrections are essential for the reliable interpretation of spectral lines from targeted and survey-mode observations with radio interferometers. Bandpass correction is typically performed by comparing…

天体物理仪器与方法 · 物理学 2020-04-22 I. Heywood , E. Lenc , P. Serra , B. Hugo , K. W. Bannister , M. E. Bell , A. Chippendale , L. Harvey-Smith , J. Marvil , D. McConnell , M. A. Voronkov

We present the first galaxy counts at 18 microns using the Japanese AKARI satellite's survey at the North Ecliptic Pole (NEP), produced from the images from the NEP-Deep and NEP-Wide surveys covering 0.6 and 5.8 square degrees respectively.…

星系天体物理 · 物理学 2015-06-22 Chris Pearson , S. Serjeant , S. Oyabu , H. Matsuhara , T. Wada , T. Goto , T. Takagi , H. M. Lee , M. Im , Y. Ohyama , S. J. Kim , K. Murata

A survey of the northern hemisphere for astrophysical point sources with continuous emission of high-energy cosmic rays is presented. Around 47 Mio extensive air showers with primary energies above $\approx$ 300 TeV measured by the KASCADE…

天体物理学 · 物理学 2019-08-14 T. Antoni

We present the characterization and calibration of the Slow-Scan observation mode of the Far-Infrared Surveyor (FIS) onboard the AKARI satellite. The FIS, one of the two focal-plane instruments on AKARI, has four photometric bands between…

Here I will outline successes and challenges for finding spectral line sources in large data cubes that are dominated by noise. This is a 3D challenge as the sources we wish to catalog are spread over several spatial pixels and spectral…

宇宙学与河外天体物理 · 物理学 2015-06-05 Baerbel S. Koribalski

We present multi-frequency and high-resolution studies of a sample of 24 radio transients sources discovered by comparing the NRAO VLA Sky Survey (NVSS) and Very Large Array Sky Survey (VLASS) surveys. All of them are characterized by a…

We investigate the clustering properties of radio sources in the Alternative Data Release 1 of the TIFR GMRT Sky Survey (TGSS), focusing on large angular scales, where previous analyses have detected a large clustering signal. After…

宇宙学与河外天体物理 · 物理学 2019-03-27 A. Dolfi , E. Branchini , M. Bilicki , A. Balaguera-Antolínez , I. Prandoni , R. Pandit

We performed a far-IR imaging survey of the circumstellar dust shells of 144 evolved stars as a mission programme of the AKARI infrared astronomical satellite using the Far-Infrared Surveyor (FIS) instrument. With this survey, we deliver…

太阳与恒星天体物理 · 物理学 2018-12-19 Toshiya Ueta , Andrew J. Torres , Hideyuki Izumiura , Issei Yamamura , Satoshi Takita , Rachael L. Tomasino

The INTEGRAL/SPI, X-gamma-ray spectrometer (20 keV - 8 MeV) is an instrument for which recovering source intensity variations is not straightforward and can constitute a difficulty for data analysis. In most cases, determining the source…

天体物理仪器与方法 · 物理学 2015-06-16 L. Bouchet , P. -R Amestoy , A. Buttari , F. -H. Rouet , M. Chauvin

We demonstrate two new approaches that have been developed to aid the production of future hard X-ray catalogs, and specifically to reduce the reliance on human intervention during the detection of faint excesses in maps that also contain…

高能天体物理现象 · 物理学 2022-01-19 V. A. Lepingwell , A. J. Bird , S. R. Gunn