Ideal Integrating Bolometer Ideal Integrating Bolometer A. Kogut, M. DiPirro, S.H. Moseley, and C. Allen Goddard Space Flight Center A bolometer consists of a thermometer with heat capacity C mounted on an absorbing substrate, weakly coupled to a bath at temperature T0 via a thermal conductance G ( Figure 1 ). ... We have developed a new bolometer concept using a non-dissipative thermometer coupled with a heat switch to break the link between thermal conductance and performance. ...

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• Gaps in the Cloud Cover? Comparing Extinction Measures in Spiral Disks
• Terrestrial Silicates Compared to Astronomical Silicates
• Imaging Performance of HST Compared to Future Ground-Based Adaptive Optics

Next: Modes of Operation Up: CCD Scientific Performance Previous: Field of View . Thermal excitation of charge carriers from the valence to the conduction band creates a dark current signal which may vary with position in the array, and also has temporal shot noise variation. ... In a device devoid of localized defects which give rise to individual dark current spikes , most dark current arises from electrons generated at interface states at the surface. ...

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• isNearlyEqual(): Comparing numbers with a given precision
• compare_columns utility
• compare_realcols utility

... The hotter the gas, the faster they move, and the more energy each of them holds. The free ions and electrons in a plasma behave the same way. Knowing the temperature of the high atmosphere of Earth, or that of the Sun, we can calculate energies expected of ions and electrons found there. However, ions and electrons actually observed in space are often much , much more energetic, and may move at a respectable fraction of the velocity of light (300,000 km/sec or 186,000 miles/sec). ...

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... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

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... User Guide ] Task: colden Purpose: calculates column densities for linear molecules Categories: map analysis COLDEN is a MIRIAD task to calculate column densities. ... Key: method Three possibilities: (1) Give one optically thin transition and the kinetic temperature (Assumes tau=0). ... Default=1. Key: in1 The first input image contains the most abundant isotope (e.g. 12CO). ... No default Key: in2 For method 1, give the kinetic temperature in the first plane. ... Key: cut Two values. ...

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• casacore: casa/Utilities/Compare.h Source File
• casacore: casa/Utilities/Compare.h File Reference
• casacore: casa::Compare_global_functions_ObjCompareFunc Struct Reference

. You can compare any two versions of a file that is under the control of SCCS with the sccsdiff command: /usr/sccs/sccsdiff -r version -r version s. filename . Using this command produces a line by line difference between the two versions of the file. Results are shown in the same format as that produced by the diff command. Examples .

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• Comparing directories
• Examples of comparing files with the sccsdiff command
• Comparing files

Jeff mock supplied 6 different types of filters to use with the high resolution mode of the mock spectrometer. ... Plots were made of the time domain voltage response as well as the frequency domain power response. A decimation of 10 was used for the filter decimation. this gave a filter length of 80 coeff. The plots compare the filter shapes for these filter types (.ps) ( .pdf ) . ... Each color is a different filter type . middle: spectral density reponse for each filter . ...

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• pntErrVsPlatformMotion
• turret cabinet,327rfi Jan16
• nov12_sbn_cals

.

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• Global Warming
• The Galaxy Gallery Page 6: Comparative Morphology
• Astronomy HyperText Book: Fusion Sequences in Stars

... Mass . 17a. Measuring Mass . ... A medium-size (1.25 inch wide) binder clip, as is used in offices to hold papers together--the type made of flat blue steel, with two wire handles. ... The theory predicts that the oscillation period should be proportional to the square root of the oscillating mass, including the mass of the clip. Note that gravity plays no part here: the oscillation period would be the same on the Moon or in zero-g. Denoting square root by SQRT, we have . ...

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• Energetic Particles

Next: Infrared Data Up: Contents Previous: Optical Photometry . ... For example, one method is to derive the spectral energy distribution (SED) for a target star and compare it to the SED of a dereddened standard star. ... Temperature can be determine via the B - V color (Gilliland 1985): . ... The results produced small extinctions to the background stars of between A and A . ... The most accurate extinction calculation requires both IR and spectral data. Infrared Data . Spectroscopic Data . ...

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• Very Low Mass PMS Objects
• PINTofALE EXAMPLE : Simulation for Chandra ACIS-I
• Correlating Spectral Data with Spatial Gain Variations

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Directory of astronomy web sites. ... Listed Since October 25, 2004 . ... Web Site . http://123world.com/astronomy/index.html . ... Web . www.astronomy.net . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

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... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Usage of ESO Images and Videos . ... View shopping cart . ... This video sequence compares a new view of the Trifid Nebula in infrared light, from the VVV VISTA survey with a more familiar visible-light view from a small telescope. The glowing clouds of gas and dust are much less prominent in the infrared view, but many more stars behind the nebula become apparent, including two newly discovered Cepheid variable stars. ...

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• Illustration the advantage of the Ultra HD format for video compared to other
• ESO publication statistics compared to other observatories
• ArtistтАЩs impression comparing the disc of material around SDSS J1228+1040 and

. Album : asv-album :: Travels to distant places and countries :: 1997/08 Kyoto, Nara (Japan) :: 20/08 Nijo castle (ancient shogun palace). Assembly opening. Maiko . Up . Nijo castle, Shogun palace. The main building. Comparing to temples and shrines, royal architecture looks modest. Next >> . Photo album generated by album generator from Marginal Hacks by David Madison on Tue Jun 23 14:46:11 2015 .

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. First page Back Continue Last page Overview Graphics .

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• Armagh Observatory Weather January 2005
• Armagh Observatory
• Another Mild November

... Design, fabrication and experimental studies of a novel device: Cold Electron Bolometer (CEB). ... The Cold-Electron Bolometer (CEB) proposed at Chalmers University is a novel device, which could be a turning point in realization of modern supersensitive detectors. ... The key element of my research is design, fabrication and studies of such terahertz band cold electron bolometer with attowatt sensitivity, to develop a novel type of bolometer in which electrons are cooled below the phonon...

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... Amorphous carbonaceous materials can show a great diversity of optical properties due to the variability in their microstructure. ... The differently pyrolized celluloses are representative for a suit of carbonaceous material ranging from strongly disordered (insulating) to graphitized (conducting) material. Figure: Complex refractive index of hydrogenated amorphous carbon prepared by pyrolysis (annealing) of cellulose at different temperatures. ...

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• Optical constant database - Level: measurement/paper
• Database of Optical Constants -- Level: group of materials

... Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... What are typical star-to-star distances in globular clusters compared to stellar distances in our region of the galaxy? ... RELATED TOPICS: GLOBULAR CLUSTERS . ... Get instant access to subscriber content on Astronomy.com! ...

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• Record-breaking photo reveals a planet-sized object as cool as Earth |

... We have made series of computer runs of the orbital evolution of asteroids for the 3/1 and 5/2 resonances with Jupiter using both the symplectic integrator RMVS3 [1] and the Bulirsh­Stoer method [2] (BULSTO). ... Besides the values of r hc presented in the Table at N = 144, for the 3/1 resonance at N = 24 we obtained r hc equal to 4.0, 1.7, 0.33, 0.4, and 0.7 at '' = 10 \Gamma8 , 10 \Gamma9 , d s = 3, 10, and 30 days, respectively. So in some cases a symplectic method can give large errors. ...

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• NAA 2011-2012 (preface)
• NAA 2007-2008 (preface)
• NAA 2009-2010 (preface)

... In short, ROMAFOT performs the best fit by comparing a given pixel to the value of the PSF at the centre of the pixel. This approximation is valid if the pixel size is small compared with the scale length of the point images. ... With the commands below the integral of the PSF over the pixel area is computed via the Gauss - Legendre integration formulae which are characterized by a high precision for a correspondingly small number of subpixels where the PSF must be calculated. ... MODEL/ROMAFOT . ...

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• Application Commands
• What is needed
• CMOS tutorial-results

... New Stars In 30 Doradus . ... Credit: John Trauger ( JPL ), James Westphal ( Caltech ), Nolan Walborn ( STScI ), Rodolfo Barba' ( La Plata Observatory ), NASA Explanation: Compare these matched Hubble Space Telescope views (visible-light on top; infrared on bottom) of a region in the star-forming 30 Doradus Nebula . Find the numbered arrows in the infrared image which identify newborn massive stars. For example, arrows 1 and 5 both point to compact clusters of bright young stars . ...

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• Астронет > New Stars In 30 Doradus
• Journal "Peremennye Zvezdy"
• XWare > APOD