To change the Scaling Function (how pixel values are binned into color levels): . ... For example, the basic grey-scale color map specifies no intensity for any color at the lowest color level, full intensity for all colors at the highest color level, with the red, green and blue intensities varying linearly for intermediate levels. ... At low bias, low color levels (i.e., low pixel values) will have non-zero intensities, while at high bias only high pixel values will have non-zero intensity. ...

Еще в разделе: (Показать все результаты (>1441) - hea-www.harvard.edu/ )

• *xdisplay* - Image Display with scaling appropriate to x-ray images
• Adding New Scaling Algorithms
• *imlintran, magnify* - Image Scale, Orientation, and Translation

Next: Combining Bias Frames Up: Preparing Your Calibration Previous: Input and Output . Except for summing the frames together, combining frames may require correcting for variations between the frames due to differing exposure times, sky background, extinctions, and positions. ... The input frames are combined by applying a sigma clipping algorithm at each pixel. ... The input frames are combined with a variant of the sigma clipping algorithm which works well with only a few frames. ...

Еще в разделе: (Показать все результаты (>1029) - www.sao.ru/ )

• Big Pixels
• Patterns
• The ? trous algorithm

... A gain value of 1 will leave the image in the default situation in which the pixel with the largest net flux is saturated, ie has an RGB with at least one of its three values equal to 1.0. ... Say this value is set to . ... In the case that gainstyle =`auto', colimplot does two things: first, it creates (internally) a histogram of numbers of image pixels against net flux; using the histogram, it then estimates a value of net flux, call it , such that pixelfraction pixels fall below this value. ...

Еще в разделе: (Показать все результаты (>8745) - xmm.vilspa.esa.es/ )

• Correction of the energy scale in specific pixels

... HST . ... HST Overview . ... The documents listed below provide plate scale and geometric distortion information for data taken in the post-NCS era (Cycle 11 and beyond). This pdf document shows the calculations for plate scale and geometric distortion from SMOV 3b. The field observed and analysis methods used to calculate the SMOV 3b plate scale and geometric distortion parameters are identical to those used for the analogous Cycle 7 measurements, described fully in OSG-CAL-97-007 (pdf). ...

Еще в разделе: (Показать все результаты (>10385) - www.stsci.edu/ )

• Field of View and Lenslet Geometry GPI Data Pipeline 1.0 documentation
• WFPC2 Instrument Handbook Update
• Image Orientation Formats Catalog

Input file: lector.dvi % +first-page:* +last-page:* +double-sided:- +skip-sides:0 +number-of-sides:65535 +backward:off +left-margin: 0in +top-margin: 0in +height:11in +width:8.5in +transformation:0 +page-width:8.5in +page-height:11in +page-left-margin:1in +page-top-margin:1in +backside-offset-x: 0in +backside-offset-y: 0in +columns:1 +rows:1 +section-count:0 +section-size:0 +full-last-section:off +fold-other:off +page-shift: ...

Еще в разделе: (Показать все результаты (>251) - xray.sai.msu.ru/ )

• http://xray.sai.msu.ru/~mystery/html/AlMir/opechat/dvihplj.dlg
• http://xray.sai.msu.ru/~mystery/html/AlMir/opechat/dvidot.dlg
• http://xray.sai.msu.ru/~mystery/html/AlMir/opechat/dviscr.dlg

... User Guide ] Task: smooth Purpose: Convolve an image (in the image domain) with a 2-D Gaussian Categories: analysis SMOOTH is a MIRIAD task that convolves an image by an elliptical Gaussian or a boxcar the hard way. ... Additional scaling is provided by the keyword "scale" By default, SMOOTH will mask pixels in the output image if there are more masked pixels than unmaked pixels in the Gaussian convolution area. This means that pixels which were maked in the input may be unmasked in the output. ...

Еще в разделе: (Показать все результаты (>6644) - www.atnf.csiro.au/ )

• GPLOT recipes
• Smoothing Images
• kpvslice: interactive position-velocity slicing

Fermi arxiv: 1007.4556 : Ilias Cholis Jo Bovy CCPP, NYU HEA, , 2010 Spherical harmonics of gamma-rays and DM annihilation Dmitry Malyshev, NYU Motivation DM annihilation at high latitudes is a large scale small amplitude signal: ``Fourier transform'' is a tool of choice for such signals Advantages of spherical harmonics decomposition for large scale structure searches: 1. ... Spherical harmonics are a natural choice for fitting the large scale structures in gamma-rays. ...

Еще в разделе: (Показать все результаты (>600) - hea.iki.rssi.ru/ )

• Комментарии к ключам заголовков файлов формата FITS

Astronomy Picture of the Day, Nov 2, 2010 : IBIS mosaic of AR NOAA 11092, imaged in the core of chromospheric Ca II 854.2 nm (left) and H-alpha 656.3 nm (right). ... The Interferometric BIdimensional Spectropolarimeter - IBIS - is a high cadence, dual interferometer imaging spectro-polarimeter, installed at the Dunn Solar Telescope of the US National Solar Observatory in New Mexico. ... It is currently operated and supported by INAF in collaboration with the US National Solar Observatory . ...

Еще в разделе: (Показать все результаты (>7143) - www.arcetri.astro.it/ )

• IBIS Gallery

CEN_POL R "F7.3" % CEN_X R "F7.3" pixels CEN_Y R "F7.3" pixels EXP R "F7.3" SCALE R "F7.2" pixels

Еще в разделе: (Показать все результаты (>4133) - www.eso.org/ )

• POLIMODEL (V2.00) --- November00 --- POLIMODEL (V2.00)
• Frequently Asked Questions
• SPECPSF (V1.00) --- May00 stecf.specres --- SPECPSF (V1.00)

OptInt PmWiki . ... Tech Meet 2 . ... Page History | ... PmWiki . ... Return to Tech Meet 2 ( Edit ) . ... 1 pixel independent of pixel scale (avoids aliasing of high frequencies in speckled image) . ... ADR & CAH: Optical image quality tolerancing of OAP-based layout . ... ADR & CAH: Layout and tolerancing of lens-based optical system . ... ADR & CAH: Use tolerancing results to assign image quality and stability budgets by component . ... ADR & CAH: Think about how to apportion image quality budget . ...

Еще в разделе: (Показать все результаты (>630) - www.mrao.cam.ac.uk/ )

• OptInt PmWiki : MROIFastTipTilt / Tech Meet 2
• OptInt PmWiki : MROIFastTipTilt / Derived Requirements Document Outline
• OptInt PmWiki : Derived Requirements Document Outline | History

... Each plot has pixels 0,1,2,3 on the first page and pixels 4,5, and 6 on the 2nd page. ... There were 3337 system temperature measurements of the entire array (7 pixels). sky coverage (.ps) ( .pdf ): This shows the ra/dec , l/b coverage of the data by project. ... TsysRatio vs az (.ps) ( .pdf ): You can see a clear two az term here (a sine wave with 180 degree period). ... TsysRatio vs AlfaRotation angle (.ps) ( .pdf ): There is 180 period for some pixels and about 90 degrees for some others. ...

Еще в разделе: (Показать все результаты (>1469) - www.naic.edu/ )

• http://www.naic.edu/~phil/mbeam/problems/174khzripple/pix4aripple_sep04.html
• Mike Nolan
• M42 Color Images

... Earth is the tiny spot between Jupiter and the Sun). ... Distance Radius Mass Name Orbits (000 km) (km) (kg) --------- ------- -------- ------- ------- Sun 697000 1.99e30 Jupiter Sun 778000 71492 1.90e27 Saturn Sun 1429000 60268 5.69e26 Uranus Sun 2870990 25559 8.69e25 * Neptune Sun 4504300 24764 1.02e26 * Earth Sun 149600 6378 5.98e24 Venus Sun 108200 6052 4.87e24 Mars Sun 227940 3398 6.42e23 Ganymede Jupiter 1070 2631 1.48e23 + Titan ... Extrema .. ...

Еще в разделе: (Показать все результаты (>424) - www.iki.rssi.ru/ )

Here are listed the largest , brightest and densest of the major bodies in the solar system and those with best prospects for life. ... Earth is the tiny spot between Jupiter and the Sun). This composite shows Earth and the remaining 11 large solar system objects at a scale of 100 km/pixel. ... Note : Neptune is slightly denser than Uranus. ... But even if no life exists on other bodies in our solar system, it seem to be likely that there's probably life elsewhere in our galaxy. ... Extrema .. ...

Еще в разделе: (Показать все результаты (>642) - www.sai.msu.su/ )

• Hands-On Training; LightFX4, More on Masks
• CoolType - Chrome
• APOD: 2004 July 29 - Melas Chasma

Originally a manually operated photographic telescope, the Uppsala Southern Schmidt (USS, 0.5 metre corrector plate aperture) has been refurbished and modernised. ... This image of omega Centauri shows the central portion of the field. ... Built in 1956 at the Uppsala Observatory workshop in Sweden, the telescope was first located at Mount Stromlo Observatory near Canberra in 1957. ... The Uppsala Southern Station was relocated to Siding Spring Observatory in 1982. ... Siding Spring Survey Main Page . ...

Еще в разделе: (Показать все результаты (>311) - www.mso.anu.edu.au/ )

• Siding Spring Survey First Light
• Comparison of simulations with the large scale radio galaxy M87.
• Eta Carinae (log-lin-lin scaling)

polimodel -- Produce model linear polarization and position angle images . ... Whether to apply random errors to output polarization and position angle values. seed = "" [integer] . ... This task produces a model linear polarization image and corresponding position angle image from an input image assumed to represent intensity (Stokes I parameter). ... A threshold for the input image can be defined such that polarization and position angle are not computed for input values less than this threshold. ...

Еще в разделе: (Показать все результаты (>165) - www.stecf.org/ )

• ASNCOMBINE (Nov98) --- nictools --- ASNCOMBINE (Nov98)
• TRAXY (V0.4) --- Dec99 --- TRAXY (V0.4)
• TRANBACK (V0.2) --- Dec99 --- TRANBACK (V0.2)

MSU-E data examples. ... MSU-E . ... 16/03/1995 10:40 Msk . Pseudo-colour image. Red - channel 3, Green - channel 2, Blue -channel 1 . scale of projection 40 m/pixel . ... True-color image (786486K) . ... Channel 4 . ...

Еще в разделе: (Показать все результаты (>2) - sputnik.infospace.ru/ )

... 172, Astronomical Data Analysis Software and Systems VIII, eds. D. M. Mehringer, R. L. Plante, & D. A. Roberts (San Francisco: ASP), 395 . ... We have investigated the internal zero-points of the HST's Faint object spectrograph (FOS) on-orbit wavelength calibration between 1990 (launch) and 1997 (de-commissioning). ... For BLUE systematic shifts of the zero-points are present, which amount to a maximum offset of 7 pixels (1.75 diodes) over the entire period. ...

Еще в разделе: (Показать все результаты (>973) - www.adass.org/ )

• Robust Estimation and Image Combining
• ADASS 2002 Conference Proceedings
• Background Fluctuation Analysis from the Multiscale Entropy

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Equatorial coronal hole (top left), polar CH (top right), quiet Sun (bottom left) and quiet Sun with TCHs (bottom right) with the positions of all the corresponding identified brightening pixels over-plotted. ... We found that in comparison to the quiet Sun, the boundaries of coronal holes are abundant with brightening events including areas inside the coronal holes where closed magnetic field structures are present. ...

Еще в разделе: (Показать все результаты (>924) - star.arm.ac.uk/ )

• Uranus, I-band
• Uranus, V-band
• SCALING FACTORS

... 1024 x 1024 pixels (13.3 mm) . ... APOGEE U-47UV 13 um pixel, back-illuminated, UV enhanced . Read-out time: . 1 sec for the whole field, 1x1 binning . Pixel Scale: . ... 1.25 e-/ADU (left, right) . Read-out noise, e: . ... 0.1 e-/sec at T ~ -30C . ... 4096 x 4096 pixels (36.9 mm) . ... Apogee U16M-HC, 9 um pixel, KAF-16803, front-illuminated . ... 24 sec, 1x1 binning . ... 1.4 e-/ADU . ... 0.01 e-/sec at CCD T ~ -40C . ... ADU saturation: . ...

Еще в разделе: (Показать все результаты (>244) - www.apo.nmsu.edu/ )

• Astrophysical Research Consortium - Apache Point Observatory
• Instrument Data Fitting
• lsst.tcc: tcc::Inst Class Reference

... Telescope: TeleVue-85 . ... Integration: 0.1 hours . ... Bortle Dark-Sky Scale: 5.00 . RA center: 83.596 degrees . DEC center: -5.499 degrees . Pixel scale: 1.955 arcsec/pixel . Orientation: 115.687 degrees . Field radius: 1.287 degrees . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Еще в разделе: (Показать все результаты (>95) - www.atmob.org/ )