scholarly journals Mid-infrared sources in the ELAIS Deep X-ray Survey

2004 ◽  
Vol 355 (1) ◽  
pp. 97-105 ◽  
Author(s):  
J. C. Manners ◽  
S. Serjeant ◽  
S. Bottinelli ◽  
M. Vaccari ◽  
A. Franceschini ◽  
...  
Keyword(s):  
X Ray ◽  
2020 ◽  
Vol 500 (3) ◽  
pp. 4078-4094
Author(s):  
Seong Jin Kim ◽  
Nagisa Oi ◽  
Tomotsugu Goto ◽  
Hiroyuki Ikeda ◽  
Simon C-C Ho ◽  
...  

ABSTRACT The North Ecliptic Pole field is a natural deep-field location for many satellite observations. It has been targeted many times since it was surveyed by the AKARI space telescope with its unique wavelength coverage from the near- to mid-infrared (mid-IR). Many follow-up observations have been carried out, making this field one of the most frequently observed areas with a variety of facilities, accumulating abundant panchromatic data from the X-ray to the radio wavelength range. Recently, a deep optical survey with the Hyper Suprime-Cam (HSC) at the Subaru telescope covered the NEP-Wide (NEPW) field, which enabled us to identify faint sources in the near- and mid-IR bands, and to improve the photometric redshift (photo-z) estimation. In this work, we present newly identified AKARI sources by the HSC survey, along with multiband photometry for 91 861 AKARI sources observed over the NEPW field. We release a new band-merged catalogue combining various photometric data from the GALEX UV to submillimetre (sub-mm) bands (e.g. Herschel/SPIRE, JCMT/SCUBA-2). About ∼20 000 AKARI sources are newly matched to the HSC data, most of which seem to be faint galaxies in the near- to mid-infrared AKARI bands. This catalogue is motivating a variety of current research, and will be increasingly useful as recently launched (eROSITA/ART-XC) and future space missions (such as JWST, Euclid, and SPHEREx) plan to take deep observations in the NEP field.


2003 ◽  
Vol 257 (1-2) ◽  
pp. 42-50 ◽  
Author(s):  
G. Hoffmann ◽  
H.J. Schimper ◽  
C. Schwender ◽  
N. Herhammer ◽  
G.F. West ◽  
...  

2006 ◽  
Vol 642 (1) ◽  
pp. 126-139 ◽  
Author(s):  
P. Barmby ◽  
A. Alonso‐Herrero ◽  
J. L. Donley ◽  
E. Egami ◽  
G. G. Fazio ◽  
...  
Keyword(s):  

2004 ◽  
Vol 418 (2) ◽  
pp. 465-473 ◽  
Author(s):  
D. Lutz ◽  
R. Maiolino ◽  
H. W. W. Spoon ◽  
A. F. M. Moorwood

2013 ◽  
Vol 434 (1) ◽  
pp. 639-651 ◽  
Author(s):  
P. Shalima ◽  
V. Jithesh ◽  
K. Jeena ◽  
R. Misra ◽  
S. Ravindranath ◽  
...  
Keyword(s):  

2010 ◽  
pp. 49-64
Author(s):  
D. Botez ◽  
G. Tsvid ◽  
M. D'Souza ◽  
J. C. Shin ◽  
Z. Liu ◽  
...  

2019 ◽  
Vol 622 ◽  
pp. A29 ◽  
Author(s):  
Chandreyee Maitra ◽  
Frank Haberl ◽  
Valentin D. Ivanov ◽  
Maria-Rosa L. Cioni ◽  
Jacco Th. van Loon

Context. Finding active galactic nuclei (AGN) behind the Magellanic Clouds (MCs) is difficult because of the high stellar density in these fields. Although the first AGN behind the Small Magellanic Cloud (SMC) were reported in the 1980s, it is only recently that the number of AGN known behind the SMC has increased by several orders of magnitude. Aims. The mid-infrared colour selection technique has proven to be an efficient means of identifying AGN, especially obscured sources. The X-ray regime is complementary in this regard and we use XMM-Newton observations to support the identification of AGN behind the SMC. Methods. We present a catalogue of AGN behind the SMC by correlating an updated X-ray point-source catalogue from our XMM-Newton survey of the SMC with previously identified AGN from the literature as well as a list of candidates obtained from the ALLWISE mid-infrared colour-selection criterion. We studied the properties of the sample with respect to their redshifts, luminosities, and X-ray spectral characteristics. We also identified the near-infrared counterpart of the sources from the VISTA observations. Results. The redshift and luminosity distributions of the sample (where known) indicate that we detect sources ranging from nearby Seyfert galaxies to distant and obscured quasars. The X-ray hardness ratios are compatible with those typically expected for AGN, and the VISTA colours and variability are also consistent with AGN. A positive correlation was observed between the integrated X-ray flux (0.2–12 keV) and the ALLWISE and VISTA magnitudes. We further present a sample of new candidate AGN and candidates for obscured AGN. Together these make an interesting subset for further follow-up studies. An initial spectroscopic follow-up of 6 out of the 81 new candidates showed that all six sources are active galaxies, although two have narrow emission lines.


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