Table of Contents, Calibrating Hubble Space Telescope . ... John W. MacKenty, Sylvia Baggett, John Biretta, . ... FOS Calibration Pipeline . ... Reference Guide and History of FOS Calibration Reference Files and Tables . ... Ultraviolet Calibration Issues in the FOS . ... GHRS Instrument and Calibration Status: 1990-1993 . ... An Assessment of the Pipeline Wavelength Calibrations for the First-Order Gratings of the GHRS in Cycle 2 . ... Return to the Calibrating Hubble Space Telescope homepage. ...

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

... The routine processing of STIS data in the calibration ``pipeline" requires an interrelated set of software tasks and databases developed and maintained by many groups at STScI. We present the systems-level design of this calibration pipeline from the perspective of the STIS instrument group at STScI. We describe the multiple interfaces to the pipeline processes that the STIS group works across in an effort to provide for the routine calibration of STIS data. ... For example, the STIS group: . ...

... The first step to improve the FORS calibration is therefore to obtain data to allow a computation of the illumination correction across the field. ... Another limitation on the calibration accuracy has been the brightness of the Landolt standards which have forced the use of extremely short exposures introducing small but non-negligible shutter-time errors and also resulting in a very small number of useful standards per frame. ...

... Калибровка снимка - это удаление из него паразитной информации, которая включает в себя: темновой шум, горячие пиксели, шум считывания (ток смещения), а также тени от пыли на матрице и оптике. Для калибровки снимка нужно подготовить снимки с паразитной, т.е. нежелательной информацией. В первую очередь нам нужно получить мастер-кадр шума считывания (ток смещения), на западе снимок шума считывания называют Bias или Offset . ... Уровень темнового шума сильно зависит от температуры матрицы. ...

... Charles Moss Duke, Jr. ... NASA Astronaut (former) . ... ORGANIZATIONS: Member of the Air Force Association, the Society of Experimental Test Pilots, Reserve Officer Association, Full Gospel Businessmen's Fellowship, Christian Businessmen's Committee; National Space Society. ... EXPERIENCE: When notified of his selection as an astronaut, Duke was at the Air Force Aerospace Research Pilot School as an instructor teaching control systems and flying in the F-101, F-104, and T-33 aircraft. ...

... List of SAS threads This thread illustrates you how to reprocess Observation Data Files (ODF) to obtain calibrated and concatenated event lists, which can be directly used to generated scientific products (images, spectra, light curves) through evselect or xmmselect . ... run the EPIC reduction meta-tasks. ... emproc For the pn: . ... emproc selectinstruments=yes emos1=yes . ... Concatenated and calibrated EPIC event lists are already available in the PPS Pipeline Products . ...

... CentralProcessor 0.11 documentation . ... These parameters govern all processing used for the calibrator observation. ... The dynamic flagging step can also optionally include antenna or baseline flagging. Then the bandpass table is calculated with cbpcalibrator , which requires MSs for all beams to be given. ... Second amplitude threshold applied when flagging 1934 data [hardware units - before calibration] . ... Name of the CASA table used for the bandpass calibration parameters. ...

... A data set contains a science frame, all its associated raw calibration frames and the master calibration frames created by combining and processing the raw calibration frames. ... Either one creates a MIDAS catalogue which contains the names of all single calibration frames to be combined in to the master frame, or, in the case of pipe line reduction, one use the Association Table. ... The names of single calibration frames are however also available in the Association Table. ...

Test stand for geometrical calibration of imaging cameras . determination of the elements of internal orientation for imaging cameras as well as the parameters of mutual orientation of the internal and instrument coordinate systems . Test stand for photometric calibration of imaging spectrometric cameras . determination of the spectral and radiance characteristics of the imaging systems . ... Test stand for determining radiation stability of components . ...

... the alfa calibration results (.ps) ( .pdf ): . the pointing error vs rotation angle offset (.ps) ( .pdf ): . ... Comparing the two lets you separate out the alfa installation errors with general telescope pointing problems (from the beam repair). ... Part of the pointing error could come from the alfa rotation angle being off. ... Compute the change in the pointing error if the alfa rotation error was off by -5 to +5 degrees in .1 degree steps. ... Top: rms pointing error vs rotation angle offset. ...

... Phase Correction Algorithms | ... This page describes work undertaken at the Cavendish Astrophysics Group , developing phase correction algorithms and software for the Atacama Large Millimetre Array (ALMA). Without correction, phase fluctuations, mainly arising from the water content of the atmosphere, would limit ALMA's performance . ... The following people are currently involved in the phase calibration workpackage, based at the Cavendish Astrophysics Group in the University of Cambridge : . ...

... Class . ... Packages that use Calibration . ... TextEncoder ( ImageProcessor ip, Calibration cal, int precision) . Constructs a TextEncoder from an ImageProcessor and optional Calibration. ... ImageStatistics. getStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... ByteStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... ColorStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... FloatStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ...

Next: Vignetting correction Up: Spatial Analysis Previous: *imcontour* - Iso-intensity contour . In order to perform detailed analysis on an x-ray field, a user will need to access the various calibration files, apply corrections for vignetting and propagate errors. Vignetting correction . makevig, vigdata* - Apply Vignetting Correction to an image . ... Background Corrections . imcalc* - Obtain a background subtracted image for ROSAT PSPC Data . ... To Resample Calibration Images . ...

... Published spectra . Published k-corrections (Bessel & Brett filters) . K-corrections using CIT filters . Filters used for the integration: U B V Rc Ic J CIT H CIT K CIT . Filters used for the k-corrections: J BB H BB K BB . New calibration of the spectra: set the desidered colors (Johnson BV- Cousins RI- CIT JHK) in the table below, press "SUBMIT" and save the output as text file. ... Spectra of individual galaxies ( calibrated in lambda and flux and normalized to average=1) . ...

Astronomy Picture of the Day . ... 27.10.1998 . ... Working at Harvard College Observatory , Leavitt precisely calibrated the photographic magnitudes of 47 stars to which all other stars could be compared. Leavitt discovered and cataloged over 1500 variable stars in the nearby Magellanic Clouds . From this catalog, Leavitt discovered that brighter Cepheid variable stars take longer to vary, a fact used today to calibrate the distance scale of our universe . ... October 1998 . ... 1997 1998 . ...

... October 27, 1998 . Henrietta Leavitt Calibrates the Stars . ... Explanation: Humanity's understanding of the relative brightness and variability of stars was revolutionized by the work of Henrietta Swan Leavitt (1868-1921). ... Leavitt discovered and cataloged over 1500 variable stars in the nearby Magellanic Clouds . From this catalog, Leavitt discovered that brighter Cepheid variable stars take longer to vary, a fact used today to calibrate the distance scale of our universe . ...

Home . Overview . ... ESO - Public Surveys . ... Draft documents describing the QC pipeline design. Calibration Plan v1.4 . Data Reduction Library Design v1.6 . ESO Calibration Workshop 2007 talks . ... Calibration for VISTA . ... The VISTA Data Flow System . ... SPIE talks . 2006 SPIE talk - VDFS Status . 2004 SPIE talk - VDFS Overview . ... ESO ][ VISTA Home ] ...

... 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: . ...

... Created: 22 January 2001 . ... SERVICE AND CALIBRATION MANUAL . ... Draft Document Outline. ... 4 Preparing NIFS for Use or Storage . ... The purpose of this Service and Calibration Manual is describe the procedures used to service, maintain, and calibrate the operation of the Gemini Near-infrared Integral Field Spectrograph. ... Section 19.4.2 of the document “Programmatic Requirements for Gemini Instrumentation Development” states the requirements for the Service and Calibration Manual . ...