... Image created from the following: 120 images of Clear filter, 20 of RGB. each of 60 second subframe. 10 Haplha of 120 second subframe. Combined Red and Halpa to get a red/haplha mean image and then processed normally through CCDStack with finishing process through Photoshop CS 5. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... omichain (omichain-1.51) [xmmsas_20080701_1801-8.0.0] . ... The omichain then cycles through each filter in the filter list and processes each exposure in the exposure list for that filter. ... If a USNO catalogue fits file is available, and the parameter usecat is set to true then it will also correct the astrometry for any offset between the OM and USNO RA and dec axes, adding the columns RA_CORR and DEC_CORR to the source-list. ...

... A tutorial on multispectral imaging of paintings using the Mona Lisa as a case study . ... Conclusions: In this article, we have presented a tutorial description of the multispectral acquisition of images from a signal processing point of view. ... I wonder if there?s literature in astronomy matching this tutorial from which we may expand and improve current astronomical photometry processes by adopting strategies developed by more populated signal/image processing engineers and statisticians. ...

... The analysis and reduction of the STIS flanking fields proceeded in similar fashion as for the imaging of the Main STIS Field. ... The DARK calibration reference file used in the CALSTIS data reduction steps was constructed using a 'delta-dark' image appropriate for the epoch of the flanking field observations. ... DRIZZLE drop-size used for the flanking fields was a "pixfrac" of 0.8. ... For information on the data reduction, please read first the technical information for the Main WFPC2 Field . ...

... New offset/filter box. A new filter/box is available. ... It is lighter, smaller and sturdier than the filter/clock and offset boxes used till now. ... The offset is stabilized to a few parts in a million. ... Notice that only positions 0-3 are meaningful, while values of 4 and above will leave the signal unfiltered. The box has one input BNC, and two output BNC: one outputs the signal with the same polarity as the input, the other reverses the signal (remember that FIRPO has negative output). ...

... A test was done with the alfa filter bank on 07dec11 to see how well the filter bank settled. ... This centered the high freq band at 1450 MHz. The low freq band at 1300 MHz was not used for the test. ... While the mock spectrometers were taking data, the alfa filterbank was switched between the wide band filter (300 MHz) and the narrow band filter (100 MHz centered at 1440 MHz). ... The alfa filter has has trouble switching between narrow band and wide band observing for most of the alfa beams. ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

World coordinates added with astrometry.net Images co-added with swarp Color images composited in ds9 and aladin image_00097.fits TARGET = ' NGC 7320 SQ' / target EXPTIME = 1.0E +02 / exposure time (seconds) FILTER = ' (1) g (400-530) ' / filter DATE-OBS = '2011-11-01T04:27:22' / date of observation (UT) image_00098.fits TARGET = ' NGC 7320 SQ' / target EXPTIME = 1.0E +02 / ...

Next: Hierarchical Wiener filtering Up: Noise reduction from Previous: The convolution from . Let us consider a measured wavelet coefficient at the scale i . We assume that its value, at a given scale and a given position, results from a noisy process, with a Gaussian distribution with a mathematical expectation , and a standard deviation : . ... We get: . ... This is done from the study of the variation of the noise between two scales, with an hypothesis of a white gaussian noise; . ...

... After the edit, recompile the kernel and recompile the Apache server then reboot. ... If you're running a really busy BSD Apache server, the following are useful things to do if the system is acting sluggish: . ... Maximum # of processes . ... This machine is a server that handles lots of traffic, # so we crank that value. options NMBCLUSTERS=4096 # mbuf clusters at 4096 # # Misc. options # options CHILD_MAX=512 # maximum number of child processes options OPEN_MAX=512 # maximum fds (breaks RPC svcs)...

... Meade Instruments Corporation . ... Meade Pictor 616A Color Filter System Instruction Manual . ... Remove the Meade Pictor 616A Color Filter System from the telescope or camera. Use the supplied hex wrench to remove the three screws from the telescope side of the Meade Pictor 616A Color Filter System. Position your Meade Pictor 616A Color Filter System to align with the diagram below. ... Carefully screw each filter into the wheel, and re-assemble the Meade Pictor 616A Color Filter System. ...

... 4.4 Imbedding HTML in a Document . In the following discussion of SPECIAL processing
, I will assume that rtftohtml has not been customized. If it has, the text styles used to create special effects may be different. ... Normally, if your RTF document contained the text "<cite>hello</cite>", the translator would output this as: "&lt;cite&gt;hello&lt;/cite&gt;". ... If, however, you want the <cite></cite> to be interpreted as HTML markup, you must format the tags using Hidden and Shadow. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Space Flight . ... Some 13.7 billion years ago, a mere millionth of a second after the Big Bang, the first hydrogen and helium nuclei condensed out of a hot, dense soup of quarks and gluons. ... In the very last few kilometres some of the light was scattered by a myriad of water droplets (containing hydrogen nuclei which had existed almost since the Big Bang) slowly descending through the air following a rainshower. ...

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... Flats : Properly exposed flats over all echelle orders require a two-step process. Flats are taken both with and without a CuSO4 (aka "blue") filter in the beam. ... Suggested exposures are 7 seconds ("red"; no filter) and 240 seconds ("blue", CuSO4 filter) yielding S/N values of ~480. The filter for "blue" flats is listed as "blue" in the Config window in Echelle control under Remark. ... Exposure times for objects can be derived from the following plot: . ...

CCD Forum Message . Forums: . ... CCD Tips and Techniques | ... CCD And What's Needed?? ... Going beyond this, you need a method of keeping the scope pointing accurately at the stars (guiding), and avoiding field rotation (wedge or a derotator). ... Now there are a number of different methods of getting the light needed for guiding. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

You can also see this page in Russian with using KOI8 (X Windows) or CP1251 (MS Windows) Cyrillic coding. The Laboratory supports the space TV experiments, mainly in the planetary exploration missions. ... Image Co-registration . ... PHOBOS mission - Martian satellites investigations. Phobos on the Martian limb, the image from Phobos-2 probe from 02/28/89. ... Russian Space Bulletin. ... Last modified at June,26 1997 Alexey Kuzmin: akuzmin@mx.iki.rssi.ru . Back to IKI home page ...

... Next: Star Finding and Up: Image Restoration and Previous: Multiresolution and Astronomical . ... Design improvements continue to be made in the filter developed using mathematical morphology principles for the Infrared Astronomical Satellite ( IRAS ) images. The purpose of this filter is to eliminate Galactic cirrus emission from extragalactic fields. ... With an appropriate normalization, the filter curve was applied to each pixel in the image to remove the Galactic cirrus. ...

... From a Bang to a Whimper - Celebrating Differing Views of the Universe - Tuesday 12 May 2009, Trinity College Dublin . ... Constructing a 16 inch Dobsonian Telescope: Monday 11 May 2009, Ballyclare . тАШ Discover the Stars at ArmaghтАЩ - the second Cross-Border Schools Science Conference, an International Year of Astronomy 2009 event, took place in Armagh on Wednesday 29th and Thursday 30th April 2009. ... International Year of Astronomy, Ireland National Node . ...