. XMM-Newton Science Analysis System . arfgen (arfgen-1.73.3) [???] . Meta Index / Home Page / Algorithm / Encircled Energy Correction . Create a filtered detector map for both the input and output regions from the input image. for each detector map pixel in the output region . foreach image pixel in the input area . Calculate fraction of PSF from this input pixel which lands in this output pixel . XMM-Newton SOC/SSC -- 2007-11-15

Describes how spatial region boundaries are handled. The golden rule for spatial region filtering was first enunciated by Leon VanSpeybroeck in 1986: . ... With this in mind, the rules for determining whether a boundary image pixel or table row are assigned to a region are defined below. For image filtering, pixels whose center is inside the boundary are included. ... That is, an row is inside the boundary without regard to its integerized pixel value. ...

... Data Reduction FAQ > A number of OmegaCAM filters show vignetting in their central regions. What are the causes for this and what are the dimensions of these features? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... A number of OmegaCAM filters are not monolithic, but consist of four segments (each covering 8 detectors) that have a central cross-shaped support structure. ... Filter . ...

... 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. ...

... Australia Telescope Compact Array Radio Imaging of the Proplyd-like Objects in the Giant HII Region NGC 3603'' . M?cke, A., Koribalski, B.S. , Moffat, A.F.J., Corcoran, M.F., Stevens, I.R. 2002, ApJ 571, 366 . ... Brenneman, L., Corcoran, M.F., Moffat, A.F.J., Marchenko, S.V., Ptak, A., Skalkowski, G., Mushotzky, R., Stevens, I.R., Mueke, A., Koribalski, B.S. , et al. ... Physical Properties of visual counterparts to X-ray sources in the giant HII region NGC 3603'' . ...

... CALSTIS V1.9 Release Notes . ... HST Overview . ... In other words, if the science data value is greater than zero, the error array value should be set to the square root of the science array value; otherwise, the error array value should be set to zero. When computing statistics, a zero error should only be regarded as a bad value if the science value is greater than zero. If both the science and error array values are less than or equal to zero, the signal to noise should be set to zero. ...

... This noise can be reduced by replacing the pixels with an average of the surrounding values using a linear filter. ... The effects of applying linear filters to a CCD frame is shown in Figure . Figure: Different digital filters applied on a CCD image: (A) original, (B) block filter, (C) smooth filter, and (D) Laplacian filter. ... To remove stellar images from a picture of comet Halley, the results of applying different non--linear filters to the frame are given in Figure . ...

Example 2: Figure 8 (90 Kbytes) shows an image of M31. While this is not a particularly spectacular image of M31 it is nevertheless unique as it was taken in a suburban backyard using a Lynxx CCD camera. The exposure is unfiltered. ... The image scale in this system is 41 arcseconds per pixel which yields a total field size of 2.2 x 1.9 square degrees. At this pixel resolution M32 blends into the light of M31, although NGC 205 (marked with a red arrow) is plainly visible. ... Page 6 . ...

... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

... A 12.5 Mhz and .78 Mhz band were input to the correlator. ... The signal then goes to the power counters (which see all 50 Mhz) and the A to D converter (8 bits) which digitizes the data and then passes it to the digital filters, and then the correlator. ... Figure 2 TOP shows the power counter values versus the 0 lag power for the 12.5 Mhz band centered at 701 Mhz. ... Figure 2 BOTTOM shows the power counters versus the 0 lag power for the .78 Mhz band that has the 5 Mhz IF filter. ...

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

Geomagnetic storms and substorms are a natural hazard similar to hurricanes, floods etc. ... Solar and geomagnetic activity also probably influences the Earth's climate and human health. ... Under southward directed IMF the Earth's magnetosphere is open to input from the solar wind flow. ... Since practical importance of solar wind measurements was recognized, a number of approaches was developed for prediction of the geomagnetic activity basing on the solar wind data. ...

... 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) . ...

... commands . ... data_spectrum <name> : data in "spectrum" format . ... Repeat command to add additional mask regions. sigma is the s.d. to apply to the data within the region to be masked. ... Repeat command to add additiona continuum regions. ... cont_reg_clear : Clear current continuum regions . ... The observed spectrum is then multipled by this filter to obtain a new spectrum for use by SFIT. cont_sigma : Computes standard deviation of data in continuum regions and applies it to current data . ...

... Big ellipse: the region of the photometric analysis Smaller ellipses: the adopted inner boundaries of the Main Body and the C component Small circles: diffuse background objects, manually selected and removed from the photometry Uncleaned CMDs [V-I, I] of I Zw 18, obtained using Aloisi et al. (left) and Izotov & Thuan (right) datasets. ... Where is the 'halo'? Blue compact dwarf galaxy SBS 1415+435 Hubble Space Telescope / Advanced Camera for Surveys NASA, ESA A. Aloisi (STScI, ESA) et al. ...

Galileo image of asteroid 951 Gaspra. This image is a combination of images taken with the violet, green and near-IR filters at a resolution of about 163 m/pixel overlain on a 54 m/pixel resolution clear filter image. ... Central Latitude/Longitude (deg): N/A . ... Instrument: Solid State Imaging CCD Camera . ... Illumination Incidence Angle (deg): N/A . Phase Angle (deg): 50. ... NASA Image ID number: P_40450c . ... Code 633, NASA Goddard Space Flight Center . Greenbelt, MD 20771, USA . ...

XPA version: 2.1.15 exposure: exposure on/off [time] file: file basename filter: filter number instrument: instrument name interrupt: interrupt mode: mode single/focus/multi multicount: multicount number number: image number process: process on/off region: region on/off [ds9/clear/select x y w h] relay: relay mask time status: on/off target: target name telescope: telescope name temperature: temperature setpoint type: type light/dark/bias/flat

The Color of IC 1795 . ... Credit Copyright: Bob and Janice Fera ( Fera Photography ) Explanation: This sharp cosmic portrait features glowing gas and obscuring dust clouds in IC 1795, a star forming region in the northern constellation Cassiopeia . ... Not far on the sky from the famous Double Star Cluster in Perseus, IC 1795 is itself located next to IC 1805, the Heart Nebula , as part of a complex of star forming regions that lie at the edge of a large molecular cloud. ...

State Research Center of Genetics and Selection of Industrial Microorganisms, GosNIIGenetika, Moscow , Russia Some questions of interpretation of results for DNA-protein binding on tiling arrays October 9, 2008 3rd workshop on algorithms in Molecular Biology , Moscow , 2008 ChIP-chip technology From: http://www.tigr.org October 9, 2008 3rd workshop on algorithms in Molecular ...

A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...