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Related papers: The UIT Survey of the Ultraviolet Sky Background

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We have used Voyager and Galex observations to map the diffuse Galactic light near the Galactic equator. We find that most of the observations are relatively faint with surface brightnesses of less than 5,000 photon units. This is important…

Astrophysics of Galaxies · Physics 2020-04-14 Jayant Murthy , R. C. Henry , James Overduin

The infrared sky from space is the sum of a cosmic signal from galaxies, quasars, and perhaps more exotic sources; and foregrounds from the Milky Way and from the Solar System. At a distance of 1 AU from the Sun, the foreground from…

Astrophysics · Physics 2009-11-10 E. L. Wright

We have used GALEX observations of the North and South Galactic poles to study the diffuse ultraviolet background at locations where the Galactic light is expected to be at a minimum. We find offsets of 230 -- 290 photon units in the FUV…

Astrophysics of Galaxies · Physics 2018-05-23 M. S. Akshaya , Jayant Murthy , S. Ravichandran , R. C. Henry , James Overduin

Ultraviolet observations from low Earth orbit (LEO) have to deal with a foreground comprised of airglow and zodiacal light which depend on the look direction and on the date and time of the observation. We have used all-sky observations…

Instrumentation and Methods for Astrophysics · Physics 2014-03-11 Jayant Murthy

We have used data from the Galaxy Evolution Explorer to study the different components of the diffuse ultraviolet background in the region between the Galactic latitudes 70-80 degree. We find an offset at zero dust column density (E(B - V)…

Astrophysics of Galaxies · Physics 2019-08-12 M. S. Akshaya , Jayant Murthy , S. Ravichandran , R. C. Henry , James Overduin

I review the development of UV and EUV astronomy, covering the spectral range from 5 to 300 nm, with emphasis on sky surveys for discrete sources. I discuss studies which resulted in lists of sources observed by imaging. The missions are…

Astrophysics · Physics 2008-02-03 Noah Brosch

The ultraviolet and optical background forms a baseline for any observation of the sky. It includes emission lines and scattered light from the atmosphere; resonant scattering from the Lyman lines of interplanetary hydrogen and the…

Astrophysics of Galaxies · Physics 2019-09-26 Jayant Murthy , M. S. Akshaya , S. Ravichandran

The spatial fluctuations of the extragalactic background light trace the total emission from all stars and galaxies in the Universe. A multi-wavelength study can be used to measure the integrated emission from first galaxies during…

The diffuse cosmic background radiation in the GALEX far ultraviolet (FUV, 1300 \AA\ - 1700 \AA) is deduced to originate only partially in the dust-scattered radiation of FUV-emitting stars: the source of a substantial fraction of the FUV…

Astrophysics of Galaxies · Physics 2015-06-19 Richard Conn Henry , Jayant Murthy , James Overduin , Joshua Tyler

We draw attention to observational evidence indicating that a substantial fraction of the well-known cosmic celestial diffuse ultraviolet background radiation field is actually due not to dust-scattered starlight, but rather---considering…

Astrophysics of Galaxies · Physics 2018-05-25 Richard Conn Henry , Jayant Murthy , James Overduin

Far-UV observations in and near the Hubble Deep Fields demonstrate that the Space Telescope Imaging Spectrograph (STIS) can potentially obtain unique and precise measurements of the diffuse far-ultraviolet background. Although STIS is not…

We present a map of the diffuse ultraviolet cosmic background in two wavelength bands (FUV: 1530 {\AA}; NUV: 2310 {\AA}) over almost 75% of the sky using archival data from the GALEX mission. Most of the diffuse flux is due to…

Astrophysics of Galaxies · Physics 2010-11-30 Jayant Murthy , Richard C. Henry , N. V. Sujatha

We present the general properties of the far-ultraviolet (FUV; 1370-1720A) continuum background over most of the sky, obtained with the Spectroscopy of Plasma Evolution from Astrophysical Radiation instrument (SPEAR, also known as FIMS),…

Astrophysics of Galaxies · Physics 2015-05-19 K. -I. Seon , J. Edelstein , E. Korpela , A. Witt , K. -W. Min , W. Han , J. Shinn , I. -J. Kim , J. -W. Park

We have previously calculated the intergalactic background light (IBL) as a function of redshift in the far ultraviolet to near infrared range, based purely on data from deep galaxy surveys. Here we utilize similar methods to determine the…

High Energy Astrophysical Phenomena · Physics 2016-08-17 Floyd W. Stecker , Sean T. Scully , Matthew A. Malkan

This paper presents optical night sky brightness measurements from the stratosphere using CCD images taken with the Super-pressure Balloon-borne Imaging Telescope (SuperBIT). The data used for estimating the backgrounds were obtained during…

We present an improved approach for constructing the UV source catalogs using observations from the UltraViolet Imaging Telescope (UVIT) onboard AstroSat, by considering the Poisson distribution of the UV background. The method is tested…

Instrumentation and Methods for Astrophysics · Physics 2025-11-19 B. Ananthamoorthy , Debbijoy Bhattacharya , P. Sreekumar , Swathi B

The cosmic far-infrared background is now well measured from 140 micron to 1 mm. Uncertainties remain at 100 micron (and even more at 60 micron). These are dominated by limitations of the zodiacal model. The nature of sources dominating the…

Astrophysics · Physics 2007-05-23 Jean-Loup Puget , Guilaine Lagache

I review the development of UV and EUV astronomy, covering the spectral range from 5 to 300 nm, with emphasis on sky surveys for discrete sources. I discuss studies which resulted in lists of sources observed by imaging and deliberately…

Astrophysics · Physics 2007-05-23 Noah Brosch

I report on progress in my ongoing work with Professor Jayant Murthy concerning the origin and nature of the diffuse ultraviolet background radiation over the sky. We have obtained and are reducing a vast trove of Voyager ultraviolet…

Astrophysics of Galaxies · Physics 2012-05-03 Richard Conn Henry

Indirect constraints on the intensity of the Extragalactic Background Light (EBL) were provided by recent studies of extragalactic sources emitting sub-TeV to multi-TeV photons. These constraints are provided thanks to the absorption of…

High Energy Astrophysical Phenomena · Physics 2014-11-07 F. Krennrich
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