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 . ...

... NICMOS Instrument Handbook version 10.0 . ... The revised main source of information on NICMOS for use in preparing proposals for Cycle 17 of the HST Observing Program. ... The first version of the handbook containing the main source of information on NICMOS for use in preparing proposals for Cycle 10 of the HST Observing Program. ... The revised main source of information on NICMOS for use in preparing proposals for Cycle 7-NICMOS of the HST Observing Program. ... NICMOS Data Handbook version 7.0 ....

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. ...

... This calibration approach is recommended when dealing with high frequency data from the old ATCA correlator, especially at 3mm wavelengths. ... The approach described here exploits the dual frequency bands that were available with the old correlator. ... Rather the current approach assumes that you have a single Miriad dataset containing bandpass calibrator, phase calibrator, flux density calibrator and program source. ... MFCAL . ... Input multi-source, dual-band dataset. select=source(1921-293) . ...

XMM-Newton SAS V5.1 Scientific Validation and Data . ... This page contains the Scientific Validation Report for SAS V5.1 (.ps.gz) as well as the data use for this validation. ... The SAS V5.0 Scientific Validation Page can be found here . ... Data Files Handbook (Issue 2.2). ODF/SDF Interface Control Document (Issue 2.9). The following datasets have been used for the Scientific Validation of SAS V5.1. ... Pipeline Products : Each Product Group is available separately as a .TAR file. ... ODF . ...

... Bojan Nikolic web pages (r. 329) . ALMA . ... AATM is a re-packaging of the version of ATM as used by the ALMA online calibration software ?TelCal?. ... The main reason for AATM is to bring the version of ATM used by ALMA to an as wide an audience as possible. ... This version of AATM therefore corresponds exactly to version on ATM-0_3_0 branch of the CVS, and will (I believe) be the same as what is used in ALMA 7.1. ... Computing dispersive atmospheric delay with AATM . ... ATM and AATM . ...

... Science . ... Science Users Information > Science Activities > VLT/VLTI Science Verification > FORS2 and UVES . ... Observing Facilities . ... Science in Garching . ... FORS2 SV Observations and Data Release . ... The Science Verification (SV) observations for FORS2 and UVES at Keuyen (UT2) will follow the same approach and policy as already described for the SV of Antu (UT1) and its instruments . ... The SV Teams plan to release UVES data by March 31, 2000, and the FORS2 data by April 30, 2000. ...

... Previous: Ground Tracking Station (GTS) Products . ... GRT Log File . ... GRT Gain Curves . ... What: Co-observing GRTs will each generate a log file identical to those for ground-based VLBI experiments. ... Where: Files are placed by GRTs on their regional server ( Regional Servers for GRT logs etc ) in the sub-directory named for the month and year (e.g. may97 ) below the sub-directory named gps . ... Where: Files are placed by GRTs on their regional server ( Regional Servers for GRT logs etc ). ...

Next: Data analysis and Spatial Up: Spatial Corrections of ROSAT Previous: Spatial Corrections of ROSAT . ... We start with an observation for which the PRF is much worse than it should be; caused by residual wobble errors or other causes. ... Spatial analysis of ROSAT HRI observations are often plagued by poor aspect solutions, precluding the attainment of the potential resolution of about 5''. ... A recent example showed one obi for which the source was 10 north of its position in the other 17 obis. ...

Next: NICMOS/HST H-band (F160W) Images Up: NICMOS Science Previous: HST NICMOS Observations of . ... Observations of P . ... The NICMOS team has devised a comprehensive program of observations of the Galactic Center. ... Data in hand give a first look at variability and a detailed look at the search for the tip of the main sequence will be discussed where NICMOS has demonstrated adequate sensitivity and photometric precision to identify likely O8-B1 stars at the Galactic Center. ...

Proposal Identi cation No.: A1474 Date Received: 2000-Oct-02 09:22:47 Technical Page Proposal Type: Long-term General Category: Astronomy Observation Category: Calibration Total Time Requested: 5hr/mo + hr in Mar01 + 30 Hours Proposal Title: Regular Monitoring of Calibration Parameters for the AO Receivers ABSTRACT: During September 2000, a considerable collective e ort was spearheaded by Carl Heiles towards characterizing the instrumental polarization for all available Arecibo receivers. ...

... The most precisely determined characteristic for accreting neutron stars (NS's) is their period. ... Period changes show fluctuations. ... Some applications of stochastic processes in astrophysics especially in accreting systems were discussed in Lipunov (1987),Hoshino Takeshima (1993) and Lipunov (1992).In Hoshino Takeshima (1993) the authors, using simple models of MHD turbulence, try to explain aperiodic changes in X-ray luminosity of X-ray pulsars. ... Here, -constant angular momentum. ...

Next: Research Up: Heritage Previous: Buildings Contents . The policy of the Armagh Observatory is to preserve and progressively restore the historic instruments, buildings and telescopes for future generations, and where possible make them available for display to visitors and the general public. In future years, subject to available funding, the Observatory plans to: . construct a new archive and historic instrument repository including an extension of the Library and Library Annex; . ...

... The choice of the spectrograph design (Fig.2) is determined by the quantity R, the overall dimensions of the PF cage and the restrictions on the rigidity of the structure of the device. ... As the camera's objective a fast 4-lens aplanat is used having a focal distance F cam =140 mm and a relative aperture of 1:1.8, the resolution at the centre is no less than 80 gr/mm, that over the field at a distance of 3 mm from the edge along the frame ( ) diagonal is 35 gr/mm. ...

... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . Research . ... Technical reports . Projects . ... General interest seminars . ... IT Services . ... Information . Resources and catalogs . ... Historical highlights . Historical research . Historical archive . ... Projects and events . Online resources . ...

PhD Thesis (PDF) . ... The evolution of stars and gas in galaxies. Observing the atomic neutral hydrogen (HI) 21 cm emission and radio continuum emission of galaxies. ... The goal of research is to quantify the neutral atomic hydrogen (HI) gas content galaxies as they evolve with time. ... Neutral atomic hydrogen gas produces a radio signal that can be used to directly measure the amount of gas present. ... USyd Summer Research Scholarship Report (PDF) . ... Research Topic Write Up (PDF) . ...

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

Peremennye Zvezdy", . ... V348 Aql, USNO-B1.0 0904-0422027 . ... Meinunger (1966) classified it as an eclipsing binary with a period very close to 1 day, noting however that the period and derived minima times were uncertain due to the low variability amplitude. As of July 2011, the O C gateway (Paschke Brat 2006; Paschke 2009) lists, in addition to Meinunger's photographic data, 2 visual and 3 CCD times of minima from Paschke (1988, 1996, 2006), Stepan (1995), Br t et al. ... Meinunger (1966) . ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...

... This project was my personal idea quite some time ago: to port XFree86 , the free and optimized X11R6 implementation to OS/2. ... XFree86/OS2 is now available as a public version 3.3.6, which does not expire and for which full source code is available. ... x.physics.usyd.edu.au Please send a mail to me with a complete URL if you have set up a ftp server or a mirror for XFree86/OS2. ... Available ported software . ... I'll still be available as the mediator between XFree86/OS2 and general XFree86. ...