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RADIO IDENTIFICATIONS IN THE NEP DEEP FIELD
Glenn J. White,Laia Barrufet de Soto,CHRIS PEARSON,STEPHEN SERJEANT,Tanya Lim,Hideo Matsuhara,S.K.Sirothia,S.Pal,Marios Karouzos 한국천문학회 2017 天文學論叢 Vol.32 No.1
We have imaged the AKARI Deep Field with the GMRT radio telescope at 610 MHz, detecting 1224 radio components, which are optically identified with 455 optical galaxies having a mean r' magnitude brighter of 22.5 (to a completeness limit of 25.4 mag), and an average redshift ~ 0.8.
THE FILAMENTARY WEB OF STAR FORMATION
White, Glenn J.,Doi, Yasuo,Komugi, Shinya,Kawada, Mitsunobu,Takita, Satoshi,Arimatsu, Ko,Ikeda, Norio,Kato, Daisuke,Kitamura, Yoshimi,Nakagawa, Takao,Ootsubo, Takafumi,Morishima, Takahiro,Hattori, Mak The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
Following the first Public Release of the AKARI Point Source catalogues, we have worked on the production of a new far-infrared All-Sky Diffuse mapping product. In this paper we report first results from the All Sky diffuse maps that will shortly be released to the community, based on analysis of data from the Far Infrared Surveyor ($65{\mu}m-160{\mu}m$) instrument. These data are likely to have a strong impact on studies of extended structures, and the diffuse ISM.
CONFERENCE SUMMARY: THE LEGACY OF AKARI: A PANORAMIC VIEW OF THE DUSTY UNIVERSE
White, Glenn J. The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
This report presents a summary of the Legacy of AKARI: A Panoramic View of the Dusty Universe meeting held between 27-29th February 2012 at Jeju Island, South Korea.
THE RADIO-FAR INFRARED CORRELATION IN THE NEP DEEP FIELD
Laia Barrufet,Glenn J. White,Chris Pearson,STEPHEN SERJEANT,Tanya Lim,Hideo Matsuhara,Nagisa Oi,Marios Karouzos 한국천문학회 2017 天文學論叢 Vol.32 No.1
We report the results of a multi-wavelength study in the North Ecliptic Pole (NEP) deep field and examine the far infrared-radio correlation (FIRC) for high and low redshift objects. We have found a correlation between the GMRT data at 610 MHz and the Herschel data at $\mathrm{250 \mu m}$ that has been usedto define a spectral index. This spectral index shows no evolution against redshift. As a result of the study, we show a radio colour-infrared diagram that can be used as a redshift indicator.
THE AGN POPULATION IN THE AKARI NEP DEEP FIELD
Laia Barrufet de Soto,Glenn J. White,Chris Pearson,STEPHEN SERJEANT,Tanya Lim,Hideo Matsuhara,Nagisa Oi,Marios Karouzos 한국천문학회 2017 天文學論叢 Vol.32 No.1
The AKARI North Ecliptic Pole Deep Field is a natural location to accomplish deep extragalactic surveys. It is supported by comprehensive ancillary data extending from radio to X-ray wavelengths, which have been used to classify radio sources as radio-loud and radio-quiet objectsand to create a catalogue of Active Galactic Nuclei (AGN). This has been achieved by using a radio-optical classificationand colour-colour diagrams rather than the more usual way based on spectroscopyFurthermore, we explore whetherthis technique can be extended by using a far-Infrared (FIR) colour-colour diagram which has been used to identify 268 high redshift candidates.
THE SYNERGY OF LARGE AREA SURVEYS WITH AKARI AND HERSCHEL
Pearson, Chris,Serjeant, Stephen,Sedgwick, Chris,White, Glenn J.,Matsuhara, Hideo,Takagi, Toshinobu,Nagisa, Oi,Murata, Kazumi,Nakagawa, Takao,Yamamura, Issei The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
The Herschel Space Observatory is the European Space Agency's state of the art infrared space telescope launched into space on 14 May 2009, covering the wavelength range from 70-700 microns with 3 instruments SPIRE, PACS and HIFI. Large area surveys are being carried out by Herschel in the AKARI legacy fields at the North and South Ecliptic Poles and the AKARI All-Sky Survey provides additional synergy with the largest survey with Herschel, H-ATLAS, covering more than 500 square degrees. This paper reports on some of the early results of these synergies between Herschel and AKARI including the first comparison of the AKARI All-Sky Survey number counts with the deeper Herschel surveys.
HERSCHEL OBSERVATIONS IN THE AKARI NEP FIELD: INITIAL SOURCE COUNTS
Chris Pearson,Ryan Cheale,STEPHEN SERJEANT,Hideo Matsuhara,Glenn J. White,Denis Burgarella,Ivan Valtchanov,Bruno Altieri,David L. Clements,Ros Hopwood 한국천문학회 2017 天文學論叢 Vol.32 No.1
The preliminary data reduction, analysis and first results from the Herschel survey of the AKARI NEP field are presented. Herschel SPIRE observations of the NEP-Wide region and PACS observations of the NEP-Deep region have yielded galaxy catalogues of 4000 and 900 sources respectively down to flux density levels of approximately 15 mJy at 100-250 microns. Source counts produced from these catalogues reach cosmologically significant depths tracing the evolutionary upturn and turnover in the source counts. The source counts are in agreement with other large area surveys carried out with Herschel bridging the gap between the shallow and deep Herschel surveys.
Hwang, Ho Seong,Serjeant, Stephen,Lee, Myung Gyoon,Lee, Kang Hwan,White, Glenn J. Blackwell Publishing Ltd 2007 Monthly notices of the Royal Astronomical Society Vol.375 No.1
<P>ABSTRACT</P><P>We present a result of cross-correlating the <I>Infrared Astronomical Satellite</I> Faint Source Catalogue with the spectroscopic catalogues of galaxies in the Fourth Data Release of the Sloan Digital Sky Survey, the Final Data Release of the 2dF Galaxy Redshift Survey (2dFGRS) and the Second Data Release of the 6dF Galaxy Survey. We have identified 324 ultraluminous infrared galaxies (ULIRGs) including 190 newly discovered ULIRGs, and two hyperluminous infrared galaxies. Adding these new ULIRGs, we increase the number of known ULIRGs by about 30 per cent. The reliability of the cross-correlation is estimated using the likelihood ratio method. The incompleteness of our sample introduced by the identification procedure in this study is estimated to be about 5 per cent. Our sample covers the redshift range of <I>z</I>= 0.037–0.517 with a median redshift of <IMG SRC='http://mnras.oxfordjournals.org/content/375/1/115/embed/inline-graphic-1.gif'/>, which is larger than that <IMG SRC='http://mnras.oxfordjournals.org/content/375/1/115/embed/inline-graphic-2.gif'/> of the sample of previously known ULIRGs.</P>
Far-infrared detection limits – I. Sky confusion due to Galactic cirrus
Jeong, Woong-Seob,Mok Lee, Hyung,Pak, Soojong,Nakagawa, Takao,Minn Kwon, Suk,Pearson, Chris P.,White, Glenn J. Blackwell Science Ltd 2005 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.357 No.2
<P>ABSTRACT</P><P>Fluctuations in the brightness of the background radiation can lead to confusion with real point sources. This type of confusion with background emission is relevant when making infrared (IR) observations with relatively large beam sizes, since the amount of fluctuation tends to increase with the angular scale. To quantitively assess the effect of the background emission on the detection of point sources for current and future far-IR observations by space-borne missions such as <I>Spitzer</I>, <I>ASTRO-F</I>, <I>Herschel</I> and <I>Space Infrared Telescope for Cosmology and Astrophysics</I> (<I>SPICA</I>), we have extended the Galactic emission map to a higher level of angular resolution than that of the currently available data. Using this high-resolution map, we estimate the sky confusion noise owing to the emission from interstellar dust clouds or cirrus, based on fluctuation analysis and detailed photometry over realistically simulated images. We find that the confusion noise derived by simple fluctuation analysis agrees well with the results from realistic simulations. Although sky confusion noise becomes dominant in long wavelength bands (>100 μm) with 60–90 cm aperture missions, it is expected to be two orders of magnitude lower for the next generation of space missions (with larger aperture sizes) such as <I>Herschel</I> and <I>SPICA</I>.</P>