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Next: Calibration of Data with Up: Calibration Methods Previous: Calibration Methods . ... If the calibrator is weakly polarised ( %), one quantity that it is difficult to solve for is the absolute XY phase, absolute feed alignment and absolute feed ellipticity. ... If we assume that the absolute alignment and ellipticity errors of the reference antenna are zero and that the XY phase measurements are accurate, a ``polarisation position angle calibrator'' is not needed. ...

Next: J.E. Chambers, Research Astronomer Up: Research Previous: Research Contents . ... Solar Variability and Climate . Other Activities . ... Applied to data of flares on Gliese866 he was able to estimate the area of hydrogen emitting flare regions as 1-13% of the stellar surface. ... As partners in the project, Armagh Observatory has been asked to contribute to the selection process in exchange for priority access to the data which will eventually flow from the satellite. ...

... OOF . ... Technical notes . ... OOF software . ... History of the OOF data reduction software . ... Building . ... SWIG 1.3.31 or later * PGPLOT * GSL V 1.6 or later * Boost C++ libraries v. 1.30.0 or later * CFitsIO Following Python Libraries: * numarray * pyfits ** Note: Problems have been reported with pyfits + numpy. ... Note . The versions of components comprising each release are a more definitive description of a build of the OOF system then the version shown in titles of these sections. ...

Next: Sample Properties Up: Sample Identification Previous: Comments on Individual Sources . Previously known serendipitous sources were selected by cross-correlating WGACAT with a variety of optical and radio catalogs, including the Ver?n-Cetty & Ver?n (1996) and Hewitt & Burbidge (1993) quasar catalogs, the 1 Jy (Stickel et al. 1994) and S4 (Stickel & K?hr 1994) radio catalogs, and the BL Lac catalog of Padovani & Giommi (1995b). ... Details of these 97 objects are given in Table 6. ...

Next: Rotation Periods of ZAMS stars Previous: T Tauri Stars . ... The first attempts to directly measure periodic modulation of T Tauri stars occurred in the early 1980s. Rydgren & Vrba (1983) observed four PMS stars using photoelectric photometry over a period of seven consecutive photometric nights. ... Because the spot lifetime is much longer than the rotational period, the observed effect will be a modulation of the light from the star synchronously with the rotation period. ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

2007 Jan 08) Bright comet C/2006 P1 (McNaught) . 2005 Jan 20) Tornado near Coonabarabran . 2005 Jan 16) Major upgrade in progress . 2005 Jan 16) Near Earth Comet 162P/Siding Spring . 2004 Apr) 2004 CB identified as a comet . 2004 Apr) Systematic surveying commenced 2004 March 16 . 2004 Apr) Media Releases on commencement of survey . 2004 Jan) 'Accidental' discovery of 2003 XB22 . ... Siding Spring Survey Main Page . ... Previous News Items . ...

. Album : asv-album :: Travels to distant places and countries :: 1998/05 Boston (USA) :: 4 Harvard . Up . << Prev . Harvard Medical School, view from the previous building . Next >> . Album created by album from David Madison 's MarginalHacks on Tue Jun 23 14:46:43 2015 .

Next: Survey Simulations Up: Minutes of the 1st Previous: RFI at Arecibo . GALFA is really a consortium of 3 separate sub-consortia centered around different science topics: Galactic HI, Continuum and Recombination lines. ... Continuum survey . ... Recombination lines . 12 H lines are found in the ALFA band, from n=163 to 174. ... At the same time, you could make an L-band map of SNR in OTF mode, basketweaving scans in RA and in Dec (the HI map would require more time than the continuum data). ...

... 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 . ...

... Muon Wobble Possible Door to Supersymmetric Universe . ... Credit: R. Bowman, g-2 Collaboration , BNL , DOE Explanation: How fast do fundamental particles wobble? ... The unexpected wobble rate may indicate that this sea houses virtual particles that include nearly invisible supersymmetric counterparts to known particles. If so, a nearly invisible universe of real supersymmetric particles might exist all around us. ... August . ... NASA Web Site Statements, Warnings, and Disclaimers . ...

Experiment COLD . ... JSEC Astronomy . ... The entire project was called "Experiment Cold". ... The best radiometer (in terms of fluctuation sensitivity) known to us, based on a parametric amplifier with a closed-cycle helium cooling system, was used in the experiment; measures were taken to "cool" the radio telescope itself; and a method of controlling the numerous sources of interference was carefully thought out. ...

Next: Electronic database Up: A Database of Optical Previous: A Database of Optical . ... Many new observational data have been measured in the last years, e.g. by the Infrared Space Observatory in 1995-1998, and interpretation of these spectroscopic data is still in progress. This requires the comparison with data of ``analog materials'' delivered by spectroscopical laboratories. Various terrestrial analogs of cosmic solids have been studied in chemical and physical laboratories. ...

. General Information . Media Files . Participants . Timetable . Local Information . Photos . Back to the album list . Previous Click the image to view it in fullsize. Previous . St. Nicholas' Cathedral was restored in 1993-1999 years after demolition in 1936. During construction the appearance of the cathedral was brought as much as possible to the initial one.

... Next: Star Finding and Up: Image Restoration and Previous: Multiresolution and Astronomical . ... Design improvements continue to be made in the filter developed using mathematical morphology principles for the Infrared Astronomical Satellite ( IRAS ) images. The purpose of this filter is to eliminate Galactic cirrus emission from extragalactic fields. ... With an appropriate normalization, the filter curve was applied to each pixel in the image to remove the Galactic cirrus. ...

... I have always heard that everything we see is "star stuff" from previous stars that died after converting their hydrogen into heavier elements. So how is there any hydrogen left for the Sun and planets? ... Hydrogen is the main source of fuel for stars like the Sun. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

Next: TCC logs Up: The Plan Previous: Focus sweep data . We have the Astrologs and the Murmur logs for every night of the run except for the night of 08 October 1999. ... The focus- <MJD> .par files were alos looked at to compare the commanded focus position with the MIG data. This effort was seriously hampered due to the fact that the focus- <MJD> .par files do not contain time stamps. The focus- <MJD> .par files do have run numbers and frame numbers written with the focus values. ...

... participations . in IAO & APAO . ... Participation permitted in both a and b groups . Participation permitted in b group only . Participation not permitted . ... Dr. Michael G. Gavrilov, Founding Chairman and Coordinator of the Asian-Pacific Astronomy Olympiad (APAO) . ... URL: http://www.issp.ac.ru/iao/apao/2011/ . ...

Next: Mission Element Points-of-Contact . Previous: Mission Operations Data Transfer . ... Each mission element should ensure that their contact information remains current and notify the RSOG of any changes. ... Non-RSOG mission elements will also use the "dit" list to notify the RSOG (and all other mission elements) of unexpected events that may impact operations elsewhere, e.g., if a tracking station discovers that the spacecraft is in an unexpected configuration. ...