Cryogenic telescope, scanner, and imaging optics for the wide-field infrared survey explorer (WISE)

ABSTRACT In order to understand the interaction between the central black hole and the whole galaxy or their co-evolution history along with cosmic time, a complete census of active galactic nucleus (AGN) is crucial. However, AGNs are often missed in optical, UV, and soft X-ray observations since they could be obscured by gas and dust. A mid-infrared (MIR) survey supported by multiwavelength data is one of the best ways to find obscured AGN activities because it suffers less from extinction. Previous large IR photometric surveys, e.g. Wide field Infrared Survey Explorer and Spitzer, have gaps between the MIR filters. Therefore, star-forming galaxy-AGN diagnostics in the MIR were limited. The AKARI satellite has a unique continuous nine-band filter coverage in the near to MIR wavelengths. In this work, we take advantage of the state-of-the-art spectral energy distribution modelling software, cigale, to find AGNs in MIR. We found 126 AGNs in the North Ecliptic Pole-Wide field with this method. We also investigate the energy released from the AGN as a fraction of the total IR luminosity of a galaxy. We found that the AGN contribution is larger at higher redshifts for a given IR luminosity. With the upcoming deep IR surveys, e.g. JWST, we expect to find more AGNs with our method.

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Detection and correlation of geosynchronous objects in NASA’s Wide-field Infrared Survey Explorer images

Acta Astronautica ◽

10.1016/j.actaastro.2021.03.009 ◽

2021 ◽

Author(s):

Joshua Fitzmaurice ◽

Donald Bédard ◽

Chris H. Lee ◽

Patrick Seitzer

Keyword(s):

Wide Field ◽

Infrared Survey

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Wide-Field InfraRed Survey Telescope (WFIRST) Mission and Synergies with LISA and LIGO-Virgo

Journal of Physics Conference Series ◽

10.1088/1742-6596/610/1/012007 ◽

2015 ◽

Vol 610 ◽

pp. 012007 ◽

Cited By ~ 16

Author(s):

N Gehrels ◽

D Spergel ◽

Keyword(s):

Wide Field ◽

Infrared Survey

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Challenges in Timeseries Analysis from Microlensing

Proceedings of the International Astronomical Union ◽

10.1017/s1743921316012886 ◽

2016 ◽

Vol 12 (S325) ◽

pp. 253-258

Author(s):

R. A. Street

Keyword(s):

Data Analysis ◽

Software Development ◽

Formation Mechanisms ◽

Wide Field ◽

Detection Techniques ◽

Timeseries Analysis ◽

Modeling Software ◽

New Software Development ◽

Host Stars ◽

Infrared Survey

AbstractDespite a flood of discoveries over the last ~ 20 years, our knowledge of the exoplanet population is incomplete owing to a gap between the sensitivities of different detection techniques. However, a census of exoplanets at all separations from their host stars is essential to fully understand planet formation mechanisms. Microlensing offers an effective way to bridge the gap around 1–10 AU and is therefore one of the major science goals of the Wide Field Infrared Survey Telescope (WFIRST) mission. WFIRST’s survey of the Galactic Bulge is expected to discover ~ 20,000 microlensing events, including ~ 3000 planets, which represents a substantial data analysis challenge with the modeling software currently available. This paper highlights areas where further work is needed. The community is encouraged to join new software development efforts aimed at making the modeling of microlensing events both more accessible and rigorous.

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H i galaxies with little star formation: an abundance of LIERs

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz593 ◽

2019 ◽

Vol 485 (3) ◽

pp. 3169-3184 ◽

Cited By ~ 6

Author(s):

Vaishali Parkash ◽

Michael J I Brown ◽

T H Jarrett ◽

A Fraser-McKelvie ◽

M E Cluver

Keyword(s):

Star Formation ◽

Emission Line ◽

Central Star ◽

Wide Field ◽

Dark Energy Survey ◽

Sky Survey ◽

Low Levels ◽

Field Unit ◽

Energy Survey ◽

Infrared Survey

Abstract We present a sample of 91 H i galaxies with little or no star formation, and discuss the analysis of the integral field unit (IFU) spectra of 28 of these galaxies. We identified H i galaxies from the H i Parkes All-Sky Survey Catalog (HICAT) with Wide-field Infrared Survey Explorer (WISE) colours consistent with low specific star formation (<10−10.4 yr−1), and obtained optical IFU spectra with the Wide-Field Spectrograph (WiFeS). Visual inspection of the PanSTARRS, Dark Energy Survey, and Carnegie-Irvine imaging of 62 galaxies reveals that at least 32 galaxies in the sample have low levels of star formation, primarily in arms/rings. New IFU spectra of 28 of these galaxies reveals 3 galaxies with central star formation, 1 galaxy with low-ionization nuclear emission-line regions (LINERs), 20 with extended low-ionization emission-line regions (LIERs), and 4 with high excitation Seyfert (Sy) emission. From the spectroscopic analysis of H i selected galaxies with little star formation, we conclude that 75 per cent of this population are LINERs/LIERs.

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WISE data and sparse photometry used for shape reconstruction of asteroids

Proceedings of the International Astronomical Union ◽

10.1017/s1743921315008492 ◽

2015 ◽

Vol 10 (S318) ◽

pp. 170-176 ◽

Cited By ~ 1

Author(s):

Josef Ďurech ◽

Josef Hanuš ◽

Victor M. Alí-Lagoa ◽

Marco Delbo ◽

Dagmara A. Oszkiewicz

Keyword(s):

Rotation Period ◽

Shape Reconstruction ◽

Physical Models ◽

Inversion Method ◽

Wide Field ◽

Reflected Light ◽

Space Data ◽

Spin Determination ◽

Infrared Survey

AbstractAsteroid disk-integrated sparse-in-time photometry can be used for determination of shapes and spin states of asteroids by the lightcurve inversion method. To clearly distinguish the correct solution of the rotation period from other minima in the parameter space, data with good photometric accuracy are needed. We show that if the low-quality sparse photometry obtained from ground-based astrometric surveys is combined with data from the Wide-field Infrared Survey Explorer (WISE) satellite, the correct rotation period can be successfully derived. Although WISE observed in mid-IR wavelengths, we show that for the period and spin determination, these data can be modelled as reflected light. The absolute fluxes are not required since only relative variation of the flux over the rotation is sufficient to determine the period. We also discuss the potential of combining all WISE data with the Lowell photometric database to create physical models of thousands of asteroids.

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