... To convert measurements in Kelvin to Jy (and vice versa) the global function convert_flux is needed. ... The function knows the basic parameters for some frequencies and telescopes, but the user may need to supply the aperture efficiency, telescope diameter or the Jy/K factor. ASAP>scans.convert_flux() # If efficency known ASAP>scans.convert_flux(eta=0.48) # If telescope diameter known ASAP>scans.convert_flux(eta=0.48,d=35) # Unknown telescope ASAP>scans.convert_flux(jypk=15) # Alternative . ...

Calibration and Data Reduction . The pipeline calibrated data are not flux calibrated and the data are in units of Data Numbers (DN). However a flux calibration is implicit in the header. To get flux density, multiply DN by the value of the keyword PHOTFLAM in the calibrated (. c0h ) science header file, and divide by the value of the keyword EXPTIME. ... Table 8.1 was generated using SYNPHOT to provide rough conversions to the Johnson UBVRI and Cousins RI systems. ...

... 3.2 CTI correction In CCDs part of the charge released by an absorbed photon is lost during transfer to the readout node. This loss depends on several parameters, in particular on the position where the photon was detected, its energy, the temperature of the CCD, and the saturation of traps by charges preceding along the readout direction. ... The model accounts for the e ects of incomplete charge collection close to the detector surface. ...

... You need to decide which standard of rest you would like to use. ... You also need to decide how you want this correction to be applied - to the center of each correlator board or to the four boards as a whole (thereby preserving the topocentric frequency offset between the boards). Typically, this choice depends on whether each board is centered on a known spectral line, or if you are doing a search in velocity space for an object. ...

Next: Quantum Efficiency Correction (a.k.a. Up: ROSAT HRI Recipes Previous: Appearance of new HRI . The mean pulse height analyzer channel (PHA) of a spectral distribution will vary depending on its location on the detector. Below is a method to compare observed data with that of preflight calibration measurements. ... For temporal gain variations, see The HRI Calbration Report . ... Retrieve the gain maps (mean PHA) from anonymous ftp at SAO. ... But don't forget temporal gain variations!] ...

As of Version 1.3, the Apache HTTP Server includes a port to (non-ASCII) mainframe machines which use the EBCDIC character set as their native codeset. ... On an EBCDIC based system, HTML files and other text files are usually saved encoded in the native EBCDIC code set, while image files and other binary data are stored with identical encoding as on ASCII based machines. ... In the case of text files of course, provisions must be made so that EBCDIC documents are always served in ASCII) . ...

... Up: Science Data Pipelines . ... Jenness, T., Archibald, E. N., Economou, F., Jessop, N., Robson, E. I., Tilanus, R. P. J., & Holland, W. S. 2001, in ASP Conf. ... Tim Jenness . ... This paper describes the automated calibration and reduction scheme used to process the archive data with particular emphasis on the pointing observations. This is made possible by using the ORAC-DR data reduction pipeline, a flexible and extensible data reduction pipeline that is used on UKIRT and the JCMT. ...

... What is the configuration of the device driver software? ... If the software you use doesn't adequately tell you what's wrong (or automatically configure it correctly) then you need to investigate how your hardware devices and their drivers are configured. ... Another problem is that when you view configuration messages on the screen, it's sometimes not clear whether the reported configuration is that of the device driver, the device hardware, or both. ...

GTK+ 2.0 Tutorial . ... This section is simply a gathering of wisdom, general style guidelines and hints to creating good GTK applications. ... Use GNU autoconf and automake! They are your friends :) Automake examines C files, determines how they depend on each other, and generates a Makefile so the files can be compiled in the correct order. ... When writing C code, use only C comments (beginning with "/*" and ending with "*/"), and don't use C++-style comments ("//"). ...

OptInt PmWiki : Pm Wiki / Upgrading From Pm Wiki 1 . This page gives suggestions for upgrading an existing PmWiki 1.x installation to use PmWiki 2.0. In this page we assume that a site administrator already has a site running using PmWiki version 1.x or earlier in a somewhat standard configuration, and wants to upgrade to the 2.0 software. Important note: The normal PmWiki upgrade procedure (i.e., copy the new software over the existing one) won't work for moving from 1.x to 2.0. ...

authspeed [ -cdm ] [ -n loops ] auth.samplekeys . This program encrypts a test file and determines the authentication delay to use in the NTP configuration file. ... Default is value to use in the authdelay configuration command. -d . ... Default is no debug output. -m . ... Default is DES-CBC algorithm. -n loops . ... Default is 20,000./authstuff/auth.samplekeys - a representative list of keys ./authstuff/auth.speed - a listing of results for a representative set of architectures and compilers . ...

... The tool is distributed through the utilities package ( utilPack ). tools related to calSelector: . ... QC1 table calsel_breakpoints . ... entry in $DFO_LST_DIR/CALSEL_BP . ... This tool manages new entries in the QC1 database table calsel_breakpoints, for a given instrument. ... Breakpoints are stored in the QC1 database table calsel_breakpoints . ... Then, the tool uses 'qc1Ingest' and writes all fields into calsel_breakpoints. ... The breakpoint table is read by the calSelector tool. ...

... Apache HTTP Server Version 2.4 . ... This page could be summarized with the statement: don't configure Apache HTTP Server in such a way that it relies on DNS resolution for parsing of the configuration files. If httpd requires DNS resolution to parse the configuration files then your server may be subject to reliability problems (ie. it might not start up), or denial and theft of service attacks (including virtual hosts able to steal hits from other virtual hosts). ... The "main server" Address . ...

... 1024 x 768 x 256 display mode is distorted. ... VESA LB Video card with S3 805 chip, 1MB RAM. ... The problem seems to be that SVGA.EXE shipped with Warp generates an SVGADATA.PMI file that does not properly "program" this particular type of S3 card. ... This generates the Warp version of \OS2\SVGADATA.PMI that you need as a base for later steps . ... Edit \OS2\SVGADATA.PMI and replace the 1024 x 768 x 256 mode configuration with the equivalent section from \OS2\PMI\OLD\SVGADATA.PMI . ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

... The International Conference "Mode Conversion, Coherent Structures and Turbulence" will be held in the Space Research Institute of RAS during the period from 23 up to 25 November 2009. ... The international conference MSS-09 is organized by Space Research Institute with participation of the Russian Academy of Sciences, the Dynasty Foundation, the Russian foundation of fundamental researches, the European Geosciences Union, the Education and the Scientific Council on Nonlinear Dynamics of RAS. ...

Physical and dynamical parameters of particles in outbursting Comet 17 P/Holmes . ... The time depending offset between the center of brightness and center of mass of the comet nucleus has been determined on the ground of positional observations of the comet. ... The motion of these particles allowed subsequent offset between the center of brightness and center of mass of the comet nucleus to be obtained from positional observations. ... comet, dynamical model, outburst, brightness. ...

... Optical constants of amorpous SiO 2 and GeO 2 in the region of valence band. ... The optical constants were determined by 4 methods: (i) Measurements of reflectivity of polarized radiation incident at 3 different angles following by solution of the Fresnel equations; (ii) Measurements of trasmittance (for tablettes of ultra-fine powder); (iii) A combined method applied to both kind of the data following by solution of Fresnel equation for the normal incidence; (iv) Kramers-Kronig method. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Star Atlas . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do astronomers determine the ages of stars? ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine ...

Astronomy Discussion Forums . Forums: . Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education . ... Discussion Forums . ... Depends . Forum List | ... Post Message | ... Posted by Rick Crockett on April 3, 2004 23:11:37 UTC . ... Correctamundo - rickcrockett - April 5, 2004 - 16:42 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...