In this section we present plots which may be used to rapidly estimate signal-to-noise ratio (SNR) for point sources with stellar spectra observed through popular WFPC2 filters. ... One uses these plots as follows: . ... Dotted lines across the top of each plot indicate the onset of saturation. ... We look at Figure B.10 and find this value on the horizontal axis. ... This exposure is well below the saturation lines in the plot, so saturation is not a concern. ... 0.45 Figure B.1: Point Source SNR vs. ...

... Let us assume to begin with that there is no source at a given location, only background. Let us calculate the probability that the observed counts at that location are due solely to background. ... The routines described in the present section are designed to take as arguments the probability cutoff (actually a cutoff in likelihood is used) and the background, or expectation value for the counts, and use them to calculate the minimum value of source counts which is detectable at those levels. ...

... 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. ...

Next: Discussion Up: The Second EGRET Catalog Previous: First Catalog Sources . In the first EGRET catalog, upper limits were given for selected objects not detected during the Phase 1 all-sky survey. These upper limits are determined using the likelihood calculation and depend on the EGRET exposure to a given direction, the contribution of the diffuse gamma radiation, and the proximity and strength of detected sources. ...

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'' . ...

The HyperNews Linux KHG Discussion Pages . Forum: The Linux Kernel Hackers' Guide . Re : resources hard limits . Keywords: getrlimit setrlimit limit ulimit hard resource limits . ... As for soft/hard limits, ulimit -S vs. ulimit -H ought to do that. Incidentally, if you specify neither, both should get changed at the same time. csh is an excemption; here you need to use limit -h for hard limits. ...

... A distance-limited sample of southern Wolf-Rayet stars within 3 kpc of the Sun has been observed with the Australia Telescope Compact Array at 8.64 GHz and 4.80 GHz. ... Five sources are classified as non-thermal. ... We derive mass-loss rates for the thermal sources. After combining them with all existing radio mass-loss rates of Wolf-Rayet stars in the northern and southern hemisphere, we perform a comparison with mass-loss rates derived from optical emission lines. ...

... Diffraction-limited Bispectrum Speckle Interferometry and Speckle Polarimetry of the Young Bipolar Outflow Source S140 IRS1 . ... P06P We present bispectrum speckle interferometry and speckle polarimetry of the deeply embedded infrared bipolar outflow source S140 IRS1, a massive protostellar object in the L1204 molecular cloud. ... Our data suggest that the central source is marginally resolved with a FWHM diameter of approximately 20 mas (~ 20 AU). ...

The NICFPS:Dither:Extended Source script allows you to a set of take pairs of dithered source/sky exposures. These pairs of exposures are taken over various points of a small 5-point dither pattern. ... dither point 1 on source . dither point 1 on sky . ... For more information see NICFPS:Dither:Point Source . ... As the script runs the status of each dither point is updated. ... This differs from the NICFPS:Dither:Point Source script, whose dither pattern is aligned with the detector. ...

The cumulative system performance is plotted for each receiver. ... When something occurs that may change the gain of the system (moving a horn, shimming the elevation rails) then a new epoch will be started. The old data is moved to the old system performance data page (the old data link points to this). ... Gain,Tsys,Sefd... (.ps) (.pdf) . ... Pointing errors (.ps) (.pdf) . ... Hour of day when sources measured (.ps). (.pdf) . list of sources with dates and filenames Old data . ...

This document explains some of the directives provided by the core server which are used to configure the basic operations of the server. ... Process Creation . Network Configuration . ... User . ... A single control process is responsible for launching child processes which listen for connections and serve them when they arrive. ... The User and Group directives are used to set the privileges of the Apache chil