... Change to COS FUV Pulse Height Filtering to Lower the Observed Dark Rate . ... Changing Programs & Resolving Problems . ... FUV HV History . ... 99% of source counts while removing approximately 20% of the observed dark counts. The actual amount of the dark rate reduction depends on the PHD of the dark counts in each observation, which varies between observations and with solar cycle activity. Because of the incredibly low dark rate on COS, the effect on most observations is very small. ...

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• Observing with Linear Ramp Filters
• Fine Guidance Sensor Instrument Handbook
• HDF-S Observing Strategy

... Special problems arise with filters intended to measure red leaks in blue and ultraviolet filters. ... The column named REDLEAK contains an 8-character string that specifies the treatment of red leaks in short-wavelength filters. Possible values are 'MEASURED' if the red leak is measured by observations through a filter that isolates the leak; 'BLOCKED' if a copper-sulfate or other blocking filter is used; or 'IGNORED' if the leak is neither measured nor blocked. ...

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• Classification of images
• Normalization and Fitting
• Filter descriptors

... NICS will be the only infrared instrument for the first light of the TNG; as a consequence, we decided to incorporate a sufficient degree of operation flexibility by providing the instrument with six different observing modes, three aimed at imaging and three at spectroscopy: . ... It will be possible to use the narrow band filters as order sorters; this will allow to perform high resolution long-slit spectroscopy in the wavelength ranges covered by the available narrow band filters. ...

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• FIRPO Help 1
• Cannibal Stars Cause Giant Explosions in Fornax Cluster Galaxy (ESO Press

... Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. ... Technical Basis of the Meade Broadband Nebular Filter: As shown in the transmission graph below, the Meade Broadband Nebular Filter strongly rejects the light of sodium- and mercury-vapor lights as well as natural airglow and auroral emissions. ... Meade Series 4000 Narrowband Nebular Filters . ... Meade Series 4000 Oxygen-III Nebular Filters . ... Meade Series 4000 Photo-Visual Color Filters . ...

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• Meade Series 4000 Photo-Visual Color Filters
• Meade Instruments Corporation - Pictor 616A Color Filter System
• Blocking Filters - Coronado€о Solar - Products

... A1 centered at 2500 angstroms with a width of 1200 angstroms . ... UGC 6151 is a Low Surface Brightness Galaxy which is at the center of the first deep survey field taken with UIT. The total exposure time was 1370 seconds out of a planned 2000 through the A1 filter. ... The galaxy has very faint outer spiral structure and tightly wound inner spiral structure. The outer spiral structure should be more prominent at UV wavelengths if star formation is occurring out there. ...

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Next: Spectroscopic Data Up: Calculation of Extinction Previous: Calculation of Extinction . Near--infrared observations were made on 5--6 February 1996 at CTIO using the CIRIM imager. ... In the infrared, the sky background is high relative to the dynamic range of the detector. ... As the first step in the reduction, all frames had a linearity correction applied (Elston 1994). ... In some cases, the dithering procedure caused stars to overlap with other stars on the final frame. ...

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• Filtering ROSAT HRI data on the basis of background level
• Chandra Images for G326.3-01.8
• Chandra Images for G332.4+00.1

... The degradation correction coefficients have been calculated by a linear fitting to the measured counts (coincidence loss corrected) of the stars BPM 16274, Hz 2 and GD 153 observed periodically since the beginning of the mission. The fit is done for each filter as a function of the MJD of observation, using the data of all stars. These stars are observed once per year (BPM 16274 twice) to monitor the variation of sensitivity. Michael Smith 2011-09-20 ...

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• XMM-Newton SAS: Watchout Page
• pn Filter Wheel Closed Data
• XMM-Newton OM Response Files Page

Direct images gallery. Here we have presented some images obtained on SAO telescopes by using SCORPIO. ... NGC 6951 . ... This color image are combined from the frames in the filters V ("blue"), R ("green") and middle-band filter SED755 ("red"). ... The true color image is constructed from three frames in B (Texp=600 sec), V (Texp=480 sec) and R (Texp=400 sec) filters. ... The true color image is constructed from three frames in B (Texp=180 sec), V (Texp=120 sec) and R (Texp=90 sec) filters. ...

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• SCORPIO-2 project: filters

Next: NICMOS/HST H-band (F160W) Images Up: NICMOS Science Previous: HST NICMOS Observations of . ... Observations of P . ... The NICMOS team has devised a comprehensive program of observations of the Galactic Center. ... Data in hand give a first look at variability and a detailed look at the search for the tip of the main sequence will be discussed where NICMOS has demonstrated adequate sensitivity and photometric precision to identify likely O8-B1 stars at the Galactic Center. ...

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• Photometric Performance of NICMOS

... ESO, the European Southern Observatory . ... Travel and Contacts . ... Green ESO . ... Survey Telescopes . ... 2002 . ... Images of Titan taken on November 26, 2002 through nine different filters to probe different altitudes, ranging from the stratosphere to the surface. ... Due to these good observing conditions, Titan's trailing hemisphere was observed with contrasts of about 40%, allowing the detection of several bright features on this surface region, once thought to be quite dark and...

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• Titan Observed Through Nine Different Filters on November 26, 2002 | ESO United
• Titan Observed Through Nine Different Filters on November 26, 2002 | ESO...
• ESO - A number of OmegaCAM filters show vignetting in their central regions.

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Parkes | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• The high quality H interference filter
• Photometric Filters Activity
• Technical aspects of the new AAO/UKST H interference filter

... Tonight's Sky . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... solar system . galaxies . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Imaging Basics . ... Observing Basics . ... Observing Basics: Visual Solar Filters . ... Expand your observing at Astronomy.com . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• filter | Astronomy.com
• Maximize a minimum filter | Astronomy.com
• Using filters | Astronomy.com

... mar05: filter bank installed but left in wide band mode. 05apr05: 10db amps placed in pixel 2a,2b path in front of the filter bank. 08apr05: 10db amps placed in front of filter bank for all alfa pixels. 12apr05: 6db attenuators placed before 10db amps. 25apr05: 10db amps are now only in the OH filter bath. ... This allowed the search of the data taken by P2030 (100Mhz bandwidth, cfr 1420Mhz, 64usec samples) between 01feb05 and 01may05 for signals of the aerostat radar. ...

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• Arecibo Observatory L-Wide Band Receiver
• hardware_pdev
• Arecibo Observatory 430-MHz Gregorian Receiver

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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• Baader NEODYMIUM (Moon & Skyglow) filter

Home . ... Observing . Exposure Time Calculator (ETC) . Survey processing . ... ESO - Public Surveys . near IR surveys . ... Exposure Time Calculator . ... Survey Area Definition Tool . Recommended values for Detector Integration Time (DIT) . ... Detector Properties . ... Filter properties . ... ESO ][ VISTA Home ] ...

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• VISTA ETC - Exposure Time Calculator
• VISTA - Visible and Infrared Survey Telescope for Astronomy

... Filters and SPIcam's Filter Wheel . Mounting filters in SPIcam's Filter Wheel . Updating the filters.txt file . ... note which filters are in which slot, so you can update the filter file (next) Updating the filters.txt file . ... edit the [filters#.txt] file that corresponds to the wheel which you changed. (e.g. filters3.txt for wheel #3) . ... if this filter wheel was installed in SPIcam, replace the [filters.txt] file with the contents of the file you just updated: . ...

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• Astrophysical Research Consortium Small Aperture Telescope
• Echelle for Beginners
• ARC 3.5m | GFP

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. ...

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• ASP: Beacons in the Gloom

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Day Star Filters, LLC . Filters for use with solar observing. ... Listed Since February 16, 1999 . ... 909) 591-4673 . ... 909) 591-6886 . Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

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• Color Filters - an Astronomy Net Eyepieces Forum Message
• Schuler Astro-Imaging Filters, AstroGuide Listing

=== Telescope: CDK20N Filters: Sloan Observer: John Kielkopf Processing: dark, flat, astrometry, swarp to coadd Exposure times: m34 _g_coadd_ median .fits 300 seconds median filtered m34 _r_coadd_ median .fits 800 seconds median filtered m34 _i_coadd_ median .fits 300 seconds median filtered Color image from ds9 red: i green: r blue: g Square root mapping to compress scale Original images: m34 _g_00043.fits ...

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• http://www.astro.louisville.edu/shared_skies/archive/select/messier/m69/20121009/notes.txt
• ij.plugin.filter Class Hierarchy (ImageJ API)
• Uses of Interface ij.plugin.filter.PlugInFilter (ImageJ API)

... The improvement will be more pronounced in our crowded Wide Field Camera (WFC) images, and may be increased further through use of a more sophisticated method of combining the individual dithered images. Our analysis allows us to check for point spread function shape variations in the HST Planetary Camera (PC) field. ... In crowded field images, we are deriving information about the faint end of the luminosity function (LF) from the texture of the image background. ...

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• Filtering KPNO LaTeX Observing Proposals with Perl
• A New Entropy Measure Based on Multiple Resolution and Noise Modeling
• A Distributed System for ``Phase II'' Proposal Preparation