CATS home ] [ Back to CATS list ] [ ftp ] . ... Received 1999 November 5; accepted 2000 February 10 Since radio sources with Ultra Steep Spectra (USS; alpha -35ddeg, we selected only sources with angular sizes Theta Comparison with spectrally unbiased samples at similar flux density levels, shows that our spectral index, flux density, and angular size selections do not affect the angular size distribution of the sample, but do avoid significant contributions by faint foreground spiral galaxies. ...

Unlike at lower redshift, where there is a 40% detection rate, surveys for 21-cm absorption arising within the hosts of z 1 radio galaxies and quasars have been remarkably unsuccessful. ... In order to find this "missing" gas at high redshift, we have therefore undertaken a survey of z 2 radio sources, selected by optical faintness. ... The possibility that the other five could be located at lower photon rates cannot be ruled out, although zero detections out of five is not statistically significant. ...

... 13-Aug-2014 12:13 106K lk_20140815_0905.tar.. 15-Aug-2014 09:06 106K lk_20140901_0823.tar.. 01-Sep-2014 08:23 103K lk_20141016_1324.tar.. 16-Oct-2014 13:25 103K lk_20141211_1708.tar.. 11-Dec-2014 17:08 103K lk_20150430_0315.tar.. 30-Apr-2015 03:15 103K lk_20150430_0420.tar.. 30-Apr-2015 04:20 103K lk_20150818_1511.tar.. 18-Aug-2015 15:11 104K lk_20151113_1903.tar.. 13-Nov-2015 19:04 105K lk_20160314_0610.tar.. 14-Mar-2016 06:11 105K . ...

Next: *tabplot* - Displaying a Up: Radial Profiles and Projections Previous: Radial Profiles and Projections . Obtain a radial distribution of counts for the source centered at x = 503, y = 513, in the data image xdata$snr.qp . The background is taken locally from an annulus outside the source region. ... Region descriptors can also be given on the command line, but they must be enclosed by quotes. xs> imcnts xdata$snr ``a 503 513 0 50 n=5'' . ...

Thanks for your interest in accessing one of the higher education resources on the ASP website, and we hope you find it useful. ... So please help us by taking a minute to answer just a few questions below before downloading the resource. ... 4-year college instructor . ... NASA education/outreach/communications professional . ... With what type of course or program do you expect to use this resource? ... High school physics course . High school Earth science course . ... Skip to the resource . ...

... The results of long-term monitoring of Gigahertz-Peaked Spectrum sources were found the statistically significant differences (0.05 significance level) in the high-frequency spectral index distribution between subgroups of galaxies and quasars. ... This can mean that the electron energy distribution for GPS galaxies is steeper than for GPS quasars. ... The first area corresponds to GPS-quasars that have statistically larger value of redfhift, second area corresponds to GPS-galaxies. ...

COS Instrument Handbook for Cycle 24 . ... Cosmic Origins SpectrographInstrument Handbook for Cycle 24 > Chapter 5: Spectroscopy with COS > 5.9 COS Spectroscopy of Extended Sources . ... COS Spectroscopy of Extended Sources . COS spectra of extended objects can have significantly lower resolution than those of point sources, depending on the spatial distribution of the source. ... A similar situation arises when multiple point sources fall within the aperture. ...

... The distribution of redshifts among the DXRBS FSRQs identified so far (Figure 3) is quite similar to that of the 1 Jy and S4 samples. ... A more thorough comparison will have to await completion of our survey and the convolution of the redshift distribution with the WGACAT sky coverage. As has already been mentioned by Hook et al. (1996), selecting flat-spectrum sources is an efficient way of finding high-redshift, radio-loud quasars. ...

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

... 172 ] Briefly, the count rate at the detector from a source at a redshift z is . ... Figure 55 shows the ``Green functions'' for the double compact binary merging rate   evolution assuming no collapse anisotropy. ... Another way that diverse peculiarities in the - distribution induced by the sources evolution could arise is connected with a possible non-monotonic character of the star formation rate in galaxies. ... 22 ] Figure  56 shows two-dimensional cuts through the parameter space. ...

Spectral and spatial deformations on piled-up sources Spectral and spatial deformations on piled-up sources "a one case study, of MOS data" EPIC Cal-Ops Meeting - Leicester University, June 7, 2001 Philippe Ferrando, CEA/ SAp Spectral and spatial deformations on piled-up sources rationale Motivations : · A number of sources are with high flux, generating pile-up · Standard spectral and spatial analysis is no more valid, · Large corrections to get absolute flux, spectral shape, spatial distribution.. ...

spaceweb@oulu.fi - last update: 5 January 1999, 1500 UT (RR) . Geomagnetic pulsations, i.e., ultra-low-frequency (ULF) waves cover roughly the frequency range from 1 mHz to 1 Hz , i.e., from the lowest the magnetospheric cavity can support up to the various ion gyrofrequencies . ... Pulsation classes . ... Pulsations are studied with in situ observations in space of both magnetic and electric fields, and with ground-based magnetometers . ... correlation with IMF/solar wind parameters . ...

... a) As source material for the high-school or college curriculum, especially in physics. astronomy and their history. (b) As a source of supplemental projects by high school students or by undergraduates. (c) As material for independent studies, In particular by motivated students who seek to know more about space . ... Those wishing to look up specific topics are advised to use the index file, accessible from the end of any "Exploration" file. ... files not listed and at other resource material. ...

Neutral hydrogen distribution in the region of radio source Cygnus X . ... HI distribution in the region of radio source Cygnus X and supernova remnant G78.2+2.1 has been investigated from observations in 21 cm radio line using radio telescope RATAN-600. ... The existance of the large HI shell and a cavity in molecular gas distribution around Cygnus X indicates this radio source most probably to represent a united structure and whole gas may be drived by stellar wind of Cyg OB2 stellar assotiation. ...

... Now, all three programs come in one easy to build package. ... Unfortunately, because it is the only brand of F90 compiler I have access to, the source codes can only be guaranteed to build with Intel Fortran Compiler v6.0 , and now with the newer v7.1 . ... Binary RPM - RedHat 8.0 Binary RPM Package (~2.8 MB) [ How to install ] . Source RPM - Source RPM package (~1.7MB) [ How to install ] . ... Source RPM - Source RPM package (~2.5MB) [ How to install ] . ... Chris Winter, 2007 . ...

The steps in making a pointing model are listed below. ... While tracking the source rise to set, the tiedowns are pulled through a range of about 14 inches (taking 14 minutes) . ... We need a strong point source as sband because we want to measure the peak even when we are out of focus (so we can determine the best za location). ... Time: this takes about 80 hours (averaging 2 hours/source with wait time.. ... so 4 days 12 hours a day will probably work when you include the time for the source. ...

... December 31, 1995 . The X-ray Sources of M31 . Credit: ROSAT , MPE , NASA . Explanation: Just like our own Milky Way Galaxy , the nearest major galaxy M31 has many star systems spewing high energy radiation . ... The X-ray sources in M31 occur in globular clusters , the spiral arms , and near the galaxy's center. ... M31 has more X-ray sources near its center than our Galaxy, and the reason for this is currently unknown. ... About APOD | ... NASA Technical Rep.: ...

Astronomy Picture of the Day . The X-ray Sources of M31 . ... 31.12.1995 . ... Credit Copyright: ROSAT , MPE , NASA Explanation: Just like our own Milky Way Galaxy , the nearest major galaxy M31 has many star systems spewing high energy radiation . ... The X-ray sources in M31 occur in globular clusters , the spiral arms , and near the galaxy's center. ... M31 has more X-ray sources near its center than our Galaxy, and the reason for this is currently unknown. ... December 1995 . ... 1995 1996 . ...

... For eight samples of main-sequence disk stars, the metallicity indices 0.6 , R-1 (U-V), m1 ( ) have been calculated. The indices 0.6 and (U-B) have been calibrated to the metal abundance [Fe/H] for the spectral types F, G and K separately. ... It is found that the UBV and RI data for F- and K-dwarfs imply that the metallicity of the Sun coincides with that found for the Hyades, whereas the G-dwarfs give the well known smaller metallicity of the Sun with respect to the Hyades. ...

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