Next: ZODIACAL Up: DIFFUSEGALA Previous: Generation from Ground Calibration Contents . It is not expected to update these CCF files on the short term, neither is there a dedicated calibration activity. However on the longterm it will be possible to estimate the diffuse background components (DGL and Zodiacal light). ... The two background components can be disentangled in this 5-dimensional data-space. Michael Smith 2011-09-20 ...

CCD Performance . ... The dark current appears to have two components: one from electronic sources in the CCD, and a second component whose strength correlates with the cosmic ray flux. ... As of this writing, the " DARKTIME" keyword in the WFPC2 image headers does not reflect correctly the actual time during which the CCD collects dark current. ... External exposures of 180s or longer made with the serial clocks off (CLOCKS=NO; the default setting) suffer an additional 60s of darktime (restart=1). ...

... The Russian Federation State Program "Physics of Condenced Matter", the "Superconductivity" division , Project code "Generation-2" . ... The multielement josephson structures are known to allow implementation of the unique properties of the Josephson junctions as electromagnetic waves sources with high change rate of generation frequency, working in the millimeter and submillimeter wavelength diapasones. ... Even the optimal type of the junction electrodynamic interconnection isn't chosen. ...

SIGNAL TO NOISE RATIO FOR SINGLE ELECTRON EVENTS . There are two types of noise present during single electron counting: the noise per event and the noise per pixel. ... 3.2 Dark Current Shot Noise . ... N g = gain noise discussed in section 1 above . ... G * S opt / S e = optical noise; the gain of a single electron times the ratio of the optical to electrical signal (see discussion above). k = 0 if background subtraction is used, or the pixel to pixel dark current non-uniformity if not. ...

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

Next: *ltcplot* - Plot the Up: Counting rate vs. time Previous: Counting rate vs. time . Produce a light curve for the source at 6940 9390, using timesorted QPOE file . input file: rp90_sti.qp . ... xt> ltcurv # In the timing package Input Source Timing File: rp90 # Only the root name is needed, # the default extension is known Input Background Timing File (NONE): <cr> # No bkg data rootname for output file: rp90 or . will assign same root name Number of Bins: 500 # 500 data bins xt> . ...

... The generation of simulated sources whose physical properties are well understood is useful in assessing the functionality of point source analysis software. Qpsim is an IRAF/PROS task which will generate events from sources of given intensity, shape, and position and either overlay them on a flat background in a new QPOE file or inject them into an existing QPOE file. ... The simulated data can be a useful tool in calibrating point source analysis software. ...

. Album : asv-album :: Travels to distant places and countries :: 1997/08 Kyoto, Nara (Japan) :: 24/08 Nara . Up . << Prev . Lawn of the temple. Golden spear on the background is explained on the next shot. Next >> . Photo album generated by album tool from Marginal Hacks by Dave Madison on Tue Jun 23 14:46:23 2015 .

Polarization signatures of clusters in the microwave background Anthony Challinor University of Cambridge, U.K. Galaxy clusters along the line of sight leave an imprint in the po- larization of the cosmic microwave background radiation (CMB). ... We also discuss the prospects of detecting such e ects, and outline some possibili- ties for using cluster polarization as a probe of cluster physics and cosmology. ...