... Home . ... Data . ... WFPC2 Home . ... Calibration . Calibration Home . ... Data Analysis . Data Analysis Home . Data Analysis Library . Photometry . ... We have examined the impact of the long term focus position variations on small aperture photometry. ... If high absolute accuracy is desired in aperture photometry, it is recommended therefore that either apertures of 5 pixels or larger be used, or the aperture correction be determined from the brightest stars in each observation. ...

Next: The ESO VLT CCD Detectors Software . ... Up: Instrument-Specific Software . ... The framework for data calibration and analysis of the VLT instrumentation is presented, based on the concepts of a calibration plan, pipeline calibration, quality control, and archiving of calibrated data for a ground-based observatory. ... Quality Control Pipeline provides quality assessment for instrument performance data and observing conditions, and tests the results of the Reduction Pipeline. ...

Next: INTRODUCTION . ... This article presents the Quality Control system of the Very Large Telescope. ... After a presentation of the QC levels and their implementation for the VLT, the paper discusses the usage of instrument models. ... On the other hand the observatory can control the instrumental configuration, test data analysis procedures, and provide calibration solutions with the help of instrument models. ... Quality Control . ... Instrument models for calibration and quality control . ...

... Parameter Mand Type Default Constraints instrument no string EMOS1 EMOS1jEMOS2jEPNjRGS1jRGS2jOM Instrument to which provided coordinate pair x/y applies. camcoordtype no string 2 1j2jDETXY Input parameters x/y are provided in xmmsas 20050815 1803-6.5.0 XMM-Newton Science Analysis System Page: 2 1 : CAMCOORD1 frame in units of mm 2 : CAMCOORD2 frame in units of mm DETXY : CAMCOORD2 frame in units of 0.05 arcsec (DETX/DETY event list column frame) x no real 0. ... CAMCOORD y coordinate value. ...

... Image Quality of the VLT . Total Optical Control . First light for the ESO VLT unit telescope 1 occurred during the workshop. ... The image shown (Figure 1 ) here was obtained with the VLT on May 16, 1998, in red light (R band), i.e. while the mirror was still uncoated. ... In this diagram (FIgure 2), the measured image quality of the VLT UT1 astronomical images is plotted versus the ``seeing", as measured by the Seeing Monitor, a small telescope also located on top of the Paranal Mountain. ...

... One of the instruments, the Troughton equatorial telescope, is maintained at constant temperature and relative humidity, to reduce the rate of deterioration. ... 3.1 Troughton Equatorial Telescope . Figure 1 shows the equatorial telescope constructed by J E Troughton of London and which was erected in the west dome of Armagh Observatory in 1795. ... Troughton, J. E.: c.1790, Instructions for Adjusting the Troughton Equatorial Telescope, Armagh Observatory Archives , M17.2, 3pp. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Coronado€о Solar . ... Spotting Scopes . ...

... These sources are much more likely to be gravitationally lensed by intervening galaxies as compared with sources discovered in surveys in other wavebands. ... The effect of lensing by clusters is then discussed briefly. This is expected to increase the source confusion noise in a Planck survey in the directions of clusters, and could provide information about galaxies with flux densities that are too faint to be detected directly by Planck . ... 2 The properties of galaxy--galaxy lensing . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Science & Technology . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Science with NIFS, Australia's First Gemini Instrument . ... The Near-infrared Integral Field Spectrograph (NIFS) will be Australia's first Gemini instrument. ... These and other science drivers for NIFS are discussed. ... NIFS Core Science . ... Gemini Core Science . ...

... 1) CAISMI--CNR, Largo E. Fermi, 5, I--50125 Firenze, Italy . 2) Osservatorio Astrofisico di Arcetri, Largo E. Fermi, 5, I--50125 Firenze, Italy . 3) Dipartimento di Astronomia e Scienza dello Spazio, Largo E. Fermi, 5, I--50125 Firenze, Italy . ... In this paper, we discuss ARNICA's optical and astronomical performance at the TIRGO and at the William Herschel Telescope on La Palma. Optical performance is evaluated in terms of plate scale, distortion, point spread function, and ghosting. ...

... A1659 Date Received: 2002-Apr-10 16:13:41 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Galactic Total Time Requested: 72 Hours Proposal Title: The CO-H2 Conversion Factor in Two Translucent Clouds ABSTRACT: The determination of the CO-H2 conversion factor for molecular clouds is one of the most important steps in deriving the physical properties of these objects. ... Maybe Part of the observing run. ...

Next: Airmass Calculation Up: Flux Calibration Previous: Flux Calibration . To calibrate the chromatic response, observations of a standard star (preferably more than one) are needed, for which the absolute fluxes are known. The spectral response curve of the instrument can then be determined with the command RESPONSE/LONG , and absolute fluxes for the objects of interest are obtained with CALIBRATE/FLUX . ...

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . ... python . ... axis . coordConvWithFP.py . ... 22 љ def coordConvWithFP (fromCoordSys, fromPVTPair, fromPxPMRadVel, fromDir, toCoordSys, obj, inst, zeroPM, useGSWavelen): . 23 љ """!Convert a coord from one coordinate system to another . ... 35 љ @param[in] obj object block computed at desired desired TAI date of conversion . ... 50 љ obj = tcc.base.Obj(obj) # make a copy so I can change obj.site if useGSWavelen . ... tcc.axis.rotFromObs.rotFromObs . ...

To appear in "Fourth Workshop on Robotic Autonomous Observatories (2015)"RevMexAA(SC) MASSIVE PHOTOMETRY OF LOW-ALTITUDE ARTIFICIAL SATELLITES ON MINI-MEGATORTORA S. Karpov, 1, 3 E. Katkova,2 G. Beskin, 1, 3 A. Biryukov3,4 S. Bondar,2 E. Davydov5 E. Ivanov,2 A. Perkov,2 V. Sasyuk3 RESUMEN Favor de prop orcionar un resumen en espanol. ... The nine-channel Mini-MegaTORTORA (MMT-9) optical widefield monitoring system with high temporal resolution system is in operation since June 2014. ...

First light from the Superconducting Integrated Receiver on board Terahertz limb sounder TELIS P. Yagoubova, G. de Langea, R. Hoogeveena, A. de Langea and V. Kosheletsb a Netherlands Institute for Space Research, SRON, the Netherlands b Institute of Radio Engineering and Electronics, IREE, Russia Abstract-- We present the flight configuration and performance of the Superconducting Integrated Receiver (SIR) channel on the TELIS instrument (Terahertz and Submm Limb Sounder). ...

SITE 2010 Comprehensive Characterization of Astronomical Sites Kislovodsk, Russia, 49 October 2010 Conference Summary Marc S. Sarazin*a a European Southern Observatory, Garching, Germany Abstract The main topics discussed during the Site 2010 conference are outlined and the outcome is described. Keywords: Astronomical Site testing, precipitable water vapor, atmospheric turbulence, cloudiness, seeing 1. ... Site surveys for National observatory projects in China, India, and Iran benefit from this. ...

. Periodic orbits in photogravitational three-body problem . A. S. Zimovschikov 1 , N. N. Titova 2 , V. N. Tkhai 1 . 1 Moscow State Academy of Instrument Making and Computer Science, Moscow, Russia . 2 A. A. Dorodnitsyn Computing Center of Russian Academy of Sciences, Moscow, Russia Abstract: . No abstract Key words: . Very Long Baseline Interferometry (VLBI), celestial mechanics, photogravitational three-body problem, periodic orbits.

Next: Model Spectra for Spectral-Fitting Up: Spectral Analysis Previous: A Quick Look at . ... For ROSAT PSPC data, this conversion is done during the on-line (SASS) processing. For IPC observations, the instrument gain varies both across the detector and in time, and is applied during off-line processing (PROS) using the BAL histogram. By default, spectra are extracted in PI bins for PSPC data and in PHA bins for IPC data. ... Special techniques are required when using Einstein IPC data. ...

... GSAOI Home . Instrument . ... The Gemini South Adaptive Optics Imager (GSAOI) is a near-infrared adaptive optics camera that will be used with the Multi-Conjugate Adaptive Optics (MCAO) system on the Gemini South 8-m telescope . ... Gemini's major instrumentation goal is to develop its Multi-Conjugate Adaptive Optics (MCAO) system for scientific use on Gemini South. ... Existing adaptive optics systems use a single natural guide star or artifical laser guide star to measure this image blur. ...

University Satellites and . Space Science Education . ... SWAP and LYRA Instruments onboard PROBA2 Microsatellite . ... SWAP telescope will obtain images of the solar corona in the extreme ultraviolet (UV) using a novel Active Pixel Sensor (APS) detector. ... SWAP and LYRA data will be of use for solar physics, aeronomy and space weather studies. ... Skobeltsyn Institute of Nuclear Physics, Moscow State University, 2005-2006 . ...