Results 41 to 50 of about 29,479 (190)

The Weak Blue Bump of H2106-099 and AGN De-Reddening [PDF]

open access: yes, 1996
We present multi-frequency spectra of the Seyfert 1 galaxy H2106-099, from radio to hard X-rays, spanning over a decade of observations. The hard X-ray (2-20 keV) spectrum measured with Ginga had a Log slope of -0.80 +/- 0.02 on 1988 May 18 and -1.02 +/-
Bradt, H. V.   +5 more
core   +2 more sources

Near-infrared reddening of extra-galactic GMCs in a face-on geometry

open access: yes, 2008
[Abridged] We describe the near-infrared reddening signature of giant molecular clouds (GMCs) in external galaxies. In particular, we examine the E(J-H) and E(H-K) color-excesses, and the effective extinction law observed in discrete GMC regions. We also
Berlind   +22 more
core   +1 more source

The Carnegie Supernova Project I: methods to estimate host-galaxy reddening of stripped-envelope supernovae [PDF]

open access: yes, 2017
We aim to improve upon contemporary methods to estimate host-galaxy reddening of stripped-envelope (SE) supernovae (SNe). To this end the Carnegie Supernova Project (CSP-I) SE SNe photometry data release, consisting of nearly three dozen objects, is used
Bersten, M.   +13 more
core   +3 more sources

Spatial Variations of Galaxy Number Counts in the Sloan Digital Sky Survey. II. Test of Galactic Extinction in High Extinction Regions

open access: yes, 2007
Galactic extinction is tested using galaxy number counts at low Galactic latitude obtained from five band photometry of the Sloan Digital Sky Survey.
Fukugita, Masataka   +2 more
core   +1 more source

The Optical to Infrared 0.6–5.3 μm Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2

open access: yesThe Astrophysical Journal Letters
The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate the 0.6–5.3 μ m ...
Shu Wang, Xiaodian Chen
doaj   +1 more source

Empirical extinction coefficients for the GALEX, SDSS, 2MASS and WISE passbands

open access: yes, 2013
Using the "standard pair" technique of paring stars of almost nil and high extinction but otherwise of almost identical stellar parameters from the SDSS, and combing the SDSS, GALEX, 2MASS and WISE photometry ranging from the far UV to the mid-IR, we ...
Liu, Xiao-Wei   +2 more
core   +1 more source

Unveiling the Active Nucleus of Centaurus A [PDF]

open access: yes, 1999
We report new HST WFPC2 and NICMOS observations of the center of the nearest radio galaxy Centaurus A (NGC 5128) and discuss their implications for our understanding of the active nucleus and jet. We detect the active nucleus in the near-IR (K and H) and,
Alessandro Capetti   +21 more
core   +2 more sources

Detective Work and Invisible Assessments: Unpacking Discretionary Processes in Welfare Decision‐Making

open access: yesSocial Policy &Administration, EarlyView.
ABSTRACT Frontline discretion serves as a core function in welfare delivery. However, little is known about the process between input and output of discretionary assessments. As welfare administrations increasingly explore automated decision‐support systems to improve consistency and efficiency, it becomes crucial to understand the mechanisms and ...
Maria G. Volckmar‐Eeg, Silje Andresen
wiley   +1 more source

Question the Mark: A Review and Assessment of Bat Marking Practices

open access: yesMammal Review, Volume 56, Issue 1, March 2026.
We reviewed a decade of research on bats and conducted a broader systematic review to assess the nature of bat marking practices and the effects and efficacy of marks. Effects of marks on bats, mark details and marking procedures are rarely reported and further research on the effects of marks on bats and more thorough reporting are needed.
Susan C. Loeb   +10 more
wiley   +1 more source

A Near-infrared Extinction and Reddening Map toward the Galactic Bulge Using UKIRT

open access: yesThe Astronomical Journal
The Galactic bulge is one of the most information-dense regions to study resolved stellar populations, variables, and transients, such as microlensing events.
Aiden S. Zelakiewicz   +5 more
doaj   +1 more source

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