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... Initial on-orbit tests of the HST two-gyro fine guiding mode and its impact on science instrument performance were carried out on 20-23 February 2005. ... HST fine-pointing performance in two-gyro mode is essentially indistinguishable from the fine-pointing performance observed previously in three-gyro mode. The HST Pointing and Control Systems group monitored the pointing jitter throughout the two-gyro on-orbit tests. ... Figure 1.1: ACS/HRC Point Spread Function Widths in Two-Gyro Mode . ...

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

... EXPN DNO D A T E UT TIME FQ SOURCE CORR-Telescopes VT734 355-MO Dec 21 08:00-21:00 C TAU-A Pointing VT735 356-TU Dec 22 08:00-21:00 C TAU-A Pointing VT736 358-TH Dec 24 09:00-20:00 K ORIONKL Pointing VT737 359-FR Dec 25 09:00-20:00 K ORIONKL Pointing VT738 360-SA Dec 26 09:00-20:00 C 0528+134 Mitk-UD KA SH W018c 364-WE Dec 30 06:00-15:00 L 0552+398 Socr-VLBA W071n 6-WE Jan 06 10:00-17:00 L J0745+10 Mitk-AT HO MP UD SH KA W059e 7-TH ...

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

On February 11-13 1998 at Kiljavanranta near Helsinki an Interball project meeting was organized by the Finnish Meteorological Institute and Russian Space Research Institute (IKI) . ... Main attention was devoted to mechanisms and manifestations of magnetospheric substorms, as observed from space and from ground observations. Four time intervals were selected for a coordinated data analysis. ... Magnetospheric storm on October 22, 1996 ( The LLBL-Driven Substorm? ... Programme of the Workshop. ...

IBIS Data Analysis . ... IBIS . ... Flat Fielding - Introduction . The images obtained by IBIS will have intensity variations across the field of view that are not due to the solar image, but rather caused by instrumental effects that alter the observed intensity in each point of the field of view. ... IBIS Flat Fielding Techniques . ... Therefore, it is desirable to obtain the flat field measurements center on a point along the equator near the heliographic center of the solar disk. ...

... The comet 169P was first observed by the Near-Earth Asteroid Tracking system. In order to observe this comet we had to figure out if it was possible to view it from Faulkes Telescope South, a 2m reflecting telescope which is used for research as well as for use by school students around the world over the internet. ... Since 169P is such a bright object, we were able to use a red filter on some of our observations to provide a clearer image. ...

... At 13:30 pm March 2 stars were acquired with the WUPPE detector and the focussing process had begun . ... The galaxy below, UGC 6151, is in the center of the field. ... In addition, the active galaxies NGC 4151 and NGC 1068 were done. ... Later in the day HUT made observations of Jupiter, the interacting galaxy pair NGC 6090 and the UV bright galaxy- Markarian 3. ... HUT acquired additional spectra of NGC 4151, a new spectra of NGC 4631, more data on the Cygnus Loop and a new spectra of MKN 421. ...

... We will consider the rms, (K), for observations with a receiver of system temperature, T , frequency resolution, per polarization, and total integration time per observing cycle, . ... For ``in-band'' frequency switching, the line under investigation is always in the observing band. ... Position Switching or ``Out-of-Band'' Frequency Switching: Here the line is only observed for one half of the time, with noise being present all of the time. ...

... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

... Sun images . Magnetic storms online . Sun flares . ... February : 2009 . ... X-ray emission of the Sun from 08.02.2009 to 09.02.2009 (GOES-10) . No solar flares of C, M and X-class were observed today . No solar flares of C, M and X-class were observed yesterday . Last updated: February 10, 2009 00:00 UT . ... 1953-2016 Laboratory of X-ray astronomy of the Sun, LPI RAS, Russia . ... 7(499)132-65-96, Fax: +7(499)132-65-97 . ...

RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . ... SSRT - Possibilities of observing . ... Investigations of the SSRT 5.7 GHz radio maps in conjunction with images obtained in other emission ranges, suggested the following conclsions: . ... Solar images obtained in line H a ;(on the left, 16:11 UT, Big Bear observatory) and in the microwave emission (on the right, 04:04 UT, SSRT) 4 march 1997 . ...

The Wind spacecraft. ... It was designed to observe the solar wind approaching Earth, from a position near the Lagrangian point L1, and it is part of the International Solar-Terrestrial Physics (ISTP) Initiative . ... The original plan called for "Wind" to approach its final station over two years, undergoing two close encounters with the Moon to boost its speed. ... For additional details and updates, see the home page of the "Wind" mission. Exploration" home page (index) Glossary . ...

... Search . ... Astrophysics Group . Research . ... Research and Instrumentation . ... While this seems an extraordinary endeavour, in light of what we have learnt about Solar System planets, only a handful of key ingredients are required to start characterising an exoplanet. ... The NGTS project is a partnership between the University of Cambridge, Queen?s University Belfast, University of Warwick, University of Leicester, Observatoire de Geneve, DLR (Berlin) and Universidad Catolica de Chile. ...

... 2001 February 19 . Shuttle Plume Shadow Points to Moon . ... Explanation: Why would the shadow of a space shuttle launch plume point toward the Moon? ... Next, just at sunset, the shadow is the longest and extends all the way to the horizon . ... Therefore, as Atlantis blasted off, just after sunset , its shadow projected away from the Sun toward the opposite horizon, where the Full Moon just happened to be. ... About APOD | ...

... Modern aspects of statistical physics and its applications. The seminar welcomes survey talks by senior researchers for the student audience and, more importantly, talks by students of undergraduate and graduate level on their research in progress. ... Olga STETIUKHINA, MSU Math. ... Anna BODROVA, MSU Physics Dept : Size distribution of particles in the rings of Saturn . ... Misha TAMM, MSU Physics Dept : A queue model (continued) . ... Misha TAMM, MSU Physics Dept : A queue model . ...

GRANAT is the Russian x-ray sattelite launched to the high apogee orbit (200,000 km) and operated almost for 10 years (1989 -1999) , carrying out four major instruments: French SIGMA coded-mask hard x-ray telescope (30-1000 keV), Soviet ART-P coded-mask telescope (2??-60?? keV), all-sky monitor WATCH (6-150 keV), and a gamma-burst detector PHEBUS . ... Since September 1994, GRANAT is in the survey mode. ... Explore pages devoted to individual GRANAT instruments (including main scientific results): . ...

Australasian Science February, 2009 Page: 44 General News Region: National Circulation: 9000 Type: Magazines Science / Technology Size: 307.82 sq.cms Monthly back Cosmic Coincidence Is Not So Surprising T he "cosmic coincidence" is the term given to the observation that we seem to exist at an odd point in the Universe's history. ... The cosmic coincidence lies in the fact that the point where the proportions of matter and energy in the Universe crossed appears to have occurred relatively recently. ...

... This thread uses PINTofALE to generate a simulated Chandra spectrum. ... define a DEM . ... pset marx .par ExposureTime=50000 OutputDir='sim_ marx ' \ ; GratingType='NONE' DetectorType=' ACIS-I ' SourceFlux=-1 \ ; SpectrumType='FILE' SpectrumFile='spec_ marx .dat' \ ; SourceType='POINT' DitherModel='INTERNAL' ; marx TSTART=2006.46 ; marx2fits sim_ marx / spec_ marx .evt ; dmextract infile= spec_ marx .evt[EVENTS][(x,y)=circle(4018,4141,10)] ; [bin pi=1:1024:1] outfile= spec_ ...