... A full set of flatfield frames was taken with the NICMOS arrays during the System Level Thermal Vacuum test, conducted on the ground in August 1996. ... Users are encouraged to recalibrate their data with on-orbit flatfields if the pipeline calibration used thermal vacuum flatfields. Preliminary results from SMOV indicate that variations in the large scale structure of the on-orbit flatfields relative to the thermal vacuum flatfields are of the order of 1-2% in Camera 2, and up to 5% in Camera 1. ...

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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. ...

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XMM-Newton OM Response Files Page . ... Data Analysis SAS News What is SAS? ... The response files have the name om_effarea_<filter>_v2.0.rsp. The response files should be used in conjunction with a spectral data file containing the filter count rate. Such a data file may be created by editing the template filter file om_filter_default.pi with a fits editor such as 'fv' and changing the "RATE" and "STAT_ERR" entries in the SPECTRUM extension to the filter count rate and error. ...

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There could be various reasons for which you may wish to contact us, ( SMARG ). ... An electronic (and/or hardcopy) RFI-complaint /report logging form is available here. This form is also available from ARTS-RFI , the operator at the Telescope (hardcopy), or by sending an e-mail to "rfi-gripe@naic.edu" (not yet in place). ... You may go back to our home page and look under PRCZ , or send an e-mail to prcz@naic.edu . ... Angel Padilla's Beeper . Utuado Beeper . ...

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... Observation codes for VSOP General Observing Time observations have the form . ... The first letter indicates which AO period the observation was proposed in: the letter `v' indicates the first AO period, and the letter `w' indicates the second and third AO periods. The three digits indicate the proposal number. ... For proposals with more than 26 experiments (see next item), 300 is added to the proposal code for the 27th and subsequent experiments. ...

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A letter to the Belfast Telegraph, published on 2008 August 13th ( link ) has been picked up by other sites who give the impression that it represents the views of the Armagh Observatory. We do not know of any evidence based on Armagh observations (whether solar or meteorological) that predicts an imminent drop in global temperatures of two degrees C, nor do we know the author of the letter to the Belfast Telegraph. ... Armagh Observatory . Last Revised: 2008 August 22nd . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Space Flight . ... By admin December 16, 2015 Posted in: Armagh Planetarium . There have been so many fantastic entries this year that the judges have struggled to pick the winners, so in the spirit of Christmas we now have four overall winners that have won a trip for their class to come to the planetarium and 28 runners up who have each won an individual family pass to visit the planetarium! ... Subscribe to Astronotes . ...

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Astronomy Discussion Forums . Forums: . ... Discussion Forums . ... Observations Of Mars . Forum List | ... Post Message | ... Using a 15mm plossol and my 2X barlow I can make out the south polar ice cap and some serface detail. ... Login to Post . ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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Next: Geometric Corrections Up: Raw to Calibrated Previous: Artifacts . ... The majority of modern detectors (e.g. CCD, diode--array or image tube) have a nearly linear response while photographic emulsions are strongly non--linear. Even for the `linear' detectors, a number of corrections must be included in the intensity calibration. ... A mathematical function is used to transform data from detectors with non--linear response to a more linear domain. ...

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The Sun 11 Solar radio bursts study with high spatial and temporal resolution V.A. Alexeev, A.F. Dementyev, B.N. Lipatov, V.F. Melnikov, M.B. Nechaeva, S.D. Snegirev, Yu.V. Tikhomirov Radiophysical Research Institute NIRFI, Nizhny-Novgorod, Russia Theoretical and experimental researches of the energy release fragmentation in solar ares need observations with high spatial 0.01 1 arcsec and temporal 1 ms resolution. ... Several VLBI stations all over the Russia were supplied by this set of equipment. ...

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... Science . ... Science Users Information > Science Publications > Science Announcements . ... ALMA . ... Observing with ESO Telescopes . ... Phase 1 Proposals . ... Data Handling and Products . ... ESO Data . ... Science Announcements . ... Published: 16 Nov 2015 . ... This survey focused on topics related to proposal preparation and submission, including interaction with the ARC / ARC nodes for ALMA proposal preparation and usability of tools such as the ALMA Science Portal or the helpdesk. ...

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... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

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The Backyard Universe . ... Credit Copyright: Paul Boltwood Explanation: How far can you see from your own backyard? Across the Solar System, even across our Galaxy, these sights are not difficult. Recently, however, amateur Paul Boltwood gazed across the universe. ... Boltwood imaged sources more faint than magnitude 24 in response to a challenge made to amateur astronomers by Yale Astronomy Professor Bradley Schaefer. Objects this dim tend to be galaxies billions of light years away. ...

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... Using multifrequency radio data obtained with the GMRT, VLA and RT, we are defining a sample of young radio AGN in the Spitzer FLS field which are associated with midinfrared sources. ... GMRT Observations The Spitzer extragalactic First Look Survey (FLS) field was observed with the Giant Metrewave Radio Telescope (GMRT, Figure 1), Pune, India, at 610 MHz in March 2004. ... Figure 1: Three of the antennas in the inner square kilometre of the Giant Metrewave Radio Telescope (GMRT). ...

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. Note: This material is from a 1994(!) Talk about CCDs - the physics remains the same, only the detector size has increased since then. ___________________________________________________________________ The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

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... Allows webmasters to configure the response of Apache to some error or problem. Customizable responses can be defined to be activated in the event of a server detected error or problem. e.g. if a script crashes and produces a "500 Server Error" response, then this response can be replaced with either some friendlier text or by a redirection to another URL (local or external). ... New behavior . ... redirect to a local URL, or . ... Each new variable will have the prefix REDIRECT_ . ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. December 24, 1997 . 30 Doradus Across the Spectrum . ... Shining in light across the electromagnetic spectrum , 30 Doradus glows because of all the energetic processes that go on there. ... Red represents X-ray emission created by gas as hot as 1 million degrees Kelvin . ... About APOD > . ...

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Cold-Electron Bolometer Arrays for THz Detection Leonid S. Kuzmin b , Mikhail A. Tarasovc,d, , Sumedh H. Mahashabdea, and Valerian S.Edelmane, Chalmers University of Technology ... Electronics, Moscow, Russia c P.Kapitza Institute for Physical Problems, Moscow, Russia a a,b,c Abstract-- Various concepts of Cold-Electron Bolometer (CEB) Arrays are considered for THz detection from 300 GHz to 7 THz ... Optical response to THz radiation is 300 ?V for 2.7/0.3 K temperature difference. ...

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... Let us first find out which way -- rise in spectral resolution with some loss in the S/N ratio or increase in the S/N ratio with a fixed spectral resolution -- is better for the purpose of reduction of equivalent width determination errors. ... N -- number of counts for 1 ? ... line equivalent width, . ... Thus if the spectral resolution is managed to be increased (i.e. to decrease )without loss in the number of counts falling at 1 ?, the equivalent width measurement error is then proportional to . ...

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