... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

Next: Other People's Software . ... Quality system management of computer workstations for astronomy can be achieved with relatively small manpower requirements, if the right cost-effective administrative design decisions are made. ... This is all done with essentially one system manager. ... The system is designed so that one doesn't depend on four or more hosts, (such as a software server, cpu server, data file server, font server, etc.) to get work done. ...

... Imagine that for every pixel in the color image, you take its luminance value (that's how bright it appears). ... In the end, you will have a histogram which counts how many times each luminance value appears in the image (that histogram can be used to analyze the distribution of the luminance values in the image). ... For the watermark effect, we want to use the same value that we used in the Stretch Contrast step, so that the lightest color will be in fact white (255), and nothing will get clamped...

... The shape of the spectrum and its overall level are closely tied, which is why both sensitivity and vignetting were discussed in the previous section. ... Therefore, undulations in the sensitivity function, which have length scales of many ngstroms, at most have a small linear effect across a given spectrum. ... Thermal drifts caused a spectrum to move on the photocathode, so the GHRS routinely performed a SPYBAL (spectrum Y-balance) to properly center the spectrum on the diode array. ...

... User Guide ] Task: linmos Purpose: Linear mosaicing of datacubes Categories: map combination LINMOS is a MIRIAD task that performs simple linear mosaicing of input cubes to produce a single output cube. If only one input cube is given, LINMOS essentially does primary beam correction on it. ... To determine the primary beam of the telescope, LINMOS first checks the map header for the presence of the "pbtype" and then "pbfwhm" parameters. ... If so, then the known form for the primary beam is used. ...

... epiclccorr (epiclccorr-1.0.8) [?? Meta Index / Home Page The aim of this task ( epiclccorr ) is to correct EPIC source TS produced by eveselect for the following effects: . ... Relative Corrections : Corrections which vary with time: . Dead Time. ... Exposure. background counts. ... The background TS will be corrected for relative effects related to the geometrical area of the source TS. epiclccorr will perform the Absolute corrections making use of the arfgen and evselect SAS tasks. ...

... Give volunteers public recognition . ... previous page | ... Public recognition for service to the club (such as managing the website or securing meeting speakers) is as important as recognition for public outreach. ... Ideas for Giving Public Recognition . ... Sharing the Universe videos are produced by the Astronomical Society of the Pacific (ASP) from research conducted by the Institute for Learning Innovation, the ASP, and from astronomy clubs like yours. www.astrosociety.org/SharingTheUniverse ...

... How much energy is there in a 20 mph wind? . 20 mph wind =10 m/s .0006 * 10 3 = .0006 * 1000 = .6 KILO watts per square meter . ... In your back yard the average wind speed is 10 mph which yields 100 watts per square meter. ... 4 3 = 64 if a 10 mph wind gives you 100 watts per square meter then a 40 mph wind gives you 64 times more power per square meter 6400 watts per square meter . total power = 6400 watts per square meter * 2 square meters = 12800 watts = 12.8 Kilowatts this is a lot! ...

... The BM effect causes low-luminosity blazars (particularly BL Lacs) to be missed in surveys because the apparent luminosity of the non-thermal nuclear source does not exceed that of the host galaxy by a large factor. ... Browne (1995). ... In addition to these objects, a large fraction of the newly-identified BL Lacs in our sample (10 of 22; see Table 5) have been so classified only by virtue of our usage of the expanded March? et al. (1996) definition of the BL Lac class. ... 1996). ...

Plasma phenomena occuring at one place in the magnetosphere also affect other locations This linkage is most pronounced between points that share the same field line, since field lines guide the motion of ions and electrons. ... It follows that the places on Earth most sensitive to distant magnetic effects are the "polar caps" , the regions around the magnetic poles. A good example is the polar aurora . ... way polar field lines . ... and to the Sun . ... Next Stop: #26H. Polar Cap--History . ...

... Briefly, the count rate at the detector from a source at a redshift z is . ... Another possible way that could lead to arising diverse peculiarities in the - distribution induced by the sources evolution is connected with a possible non-monotonic character of the star formation rate in galaxies. ... The most prominent feature of the obtained theoretical - is a notable sharp increase at low count rates due to evolutionary effects. ...

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