SAS home . SAS Watchout items . ... This thread contains a step-by-step recipe to extract a light curve of a point-like source for all the X-ray cameras, subtracting the background and correcting for exposure loses. ... The SAS task barycen performs this correction. ... If the following files are available: a) RGS event list; b) RGS source list, a call to the task performing light curve extraction, correction and background subtraction rgslccorr allows a user to create the light curve. ...

... GPI Data Pipeline 1.0 documentation . ... Thermal/Sky Backgrounds . ... Using Thermal/Sky Backgrounds in GPI Data Reduction: . Creating Calibrations: . ... Thermal emission (from sky or telescope) becomes an important background source for wavelengths longer than 2 microns. ... The pipeline treats thermal/sky backgrounds similar to dark frames and is designed to subtract a thermal/sky background, scaled to the integration time of the science image, from K-band observations. ...

Next: Order Extraction Up: Background Definition Previous: Background estimate by . ... The sky background component can be measured in spectra taken with an extended slit using the two commands DEFINE/SKY and EXTRACT/SKY . ... The command EXTRACT/ECHELLE performs an average extraction of the sky background using these offsets, optionally fiters for cosmics, and provides an extracted spectrum in a format similar to the one resulting from EXTRACT/ECHELLE . ...

Next: *imcalc* - Obtain a Up: Calibration Previous: Exposure Map . Background maps are provided by the standard processing for all ROSAT and Einstein instruments. For the PSPC and IPC these are in three standard bands: soft, hard, and broad (Table 6.2). ... N.B.: ROSAT PSPC background maps in SASS 5-6 or higher are generated by smoothing a source-subtracted, exposure corrected image (see the ROSAT Data Products Guide). ... imcalc* - Obtain a background subtracted image for ROSAT PSPC Data . ...

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

... 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. ...

... Unsafe act - a behavioral departure from an accepted, normal, or correct procedure or practice which, in the past, has produced injury or property damage or which has potential for doing so in the future; an unnecessary exposure to a hazard; conduct reducing the degree or safety normally present in an activity. ... Any hazardous unsafe condition, or act that presents a situation of imminent danger to life and/or property requires urgent action. ...

ALMA | ... In this section, we explain why we need to correct phase fluctuations and ALMA's strategy to do this. Rapid fluctuations will be corrected with water vapour radiometers (WVRs). The Cavendish Astrophysics Group was also a leading contributor to the ALMA prototype WVRs, which were put through their paces in tests at the Submillimeter Array (SMA). ... The Cavendish Astrophysics Group in partnership with the Onsala Space Observatory built two prototype WVRs for the ALMA project. ...

... Also the measured signals are a#ected by detector transients, altering the final results considerably. ... The sequence is bounded by two measurements of the FCS , to fix the responsivity for the baseline correction 0 200 400 600 800 1000 measurement time [s] 0.00 0.02 0.04 0.06 0.08 0.10 Volt/second bg source fitted baseline 2. FCS 1. FCS source initial drifting signal corrected signal bg FCS source background signal internal calibration signal source signal corrected ...

... Wind, Air Temperature, Dew Point and Relative Humidity Statistics, yearly, 2000 to 2005 (pdf) and seasonal, 1999 to 2007 (pdf) . Wind and Wind gust . Temperature . Relative Humidity . Dew-point Temperature . ... Real Time Astroclimate . ... Astroclimatology of ESO Sites , ESO Wide Review, April 2000 . Paranal Long Term Astroclimate Analysis . ... Send comments to <Marc.Sarazin@eso.org> . Last update: September 8, 1999 . ...

Twilight observations with MASS/DIMM B. Safonov Sternberg Astronomical Institute Moscow State University Comprehensive Characterization of Astronomical Sites, 2010 B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 1 / 17 Why observe in twilight with MASS/DIMM? ... ASM includes 3 devices sensitive to background: guider, DIMM and MASS. B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 2 / 17 Background in guider. ...

... Usually, H I is seen as bright emission against a darker background, but under the right viewing conditions, it can also be seen as dark absorption against a brighter background. In the case where the background is itself H I emission, the hydrogen is said to be self-absorbed, and the radiative transfer process is termed H I self-absorption (HISA). ... Shown below is a single CGPS H I 21cm spectral line channel at a radial velocity of -41 km/s in the Local Standard of Rest, at l =140њ, b =+1њ. ...

... RC Optical 24-inch Ritchie Chretien telescope . ... Live snapshots . Live site camera (limited access) . Live all sky camera (limited access) . ... Mount Kent Observatory in Queensland ( USQ ) . ... Regional weather . Clear Sky Chart for Moore Observatory . ... Louisville, Kentucky, time and weather . ... Kent observatories . 24-inch Ritchie-Chretien telescope photo gallery . Moore Observatory's CDK20 telescope photo gallery . ... Kent Observatory's CDK700 telescope photo gallery . ...

. Russian (WIN) . 10-27/2/1999 . 6-28/1/1999 . For more information send a mail to: info@sputnik.infospace.ru . © 1998-2002 SMIS IKI RAN and SRC "PLANETA" Moscow, Russia.

Next: Listing and Plotting Velocity Up: Spectral Line Data Reduction Previous: Spectral Line Processing and . When fits reads a visibility FITS file, it can use one of two schemes for computing the observatory's radial velocity. ... fits assumes that a velocity of a given channel remains constant. ... You can either allow fits to retrieve the needed velocity information from the FITS file, or you can give this information explicitly using the velocity keyword. ...

Isabel Leonor University of Oregon searched 25 S2 GRBs for coincident G-waves of duration ~1 ­ 10 ms used crosscorrelation method explored data conditioning in the frequency domain, included whitening and phase correction ­ luxury of limited on-source and off-source data to analyze injected signals to study sensitivity of pipeline used playground data with no GRB trigger data analysis code (standalone), injection and calibration scripts, written using Matlab ...

... Copyrightї1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

... History of regular observations over the Kerch Strait and the data sets available Chapter 2. ... Hydrometeorological conditions during the 10­12 November 2007 catastrophic storm, chronology of events, administrative actions taken and consequences of the disaster 30 34 38 55 Chapter 5. ... Satellite monitoring of the oil spill in the Kerch Strait 161 Chapter 7. ... Inventory of Data sets on the Kerch Strait accident oil spill, 11 November 2007 Annex 4. ... Measures taken by Ukraine Annex 6. ...

... Topic: xterm and Xaw library vulnerability Announced: 3 May 1998 Affects: All XFree86 versions up to and including 3.3.2 Corrected: XFree86 3.3.2 patch 1 XFree86 only: no Patches: ftp://ftp.xfree86.org/pub/XFree86/3.3.2/fixes/3.3.2-patch1 ============================================================================= I. Background Xterm is a terminal emulator that is part of the core X Window System, and is included in every XFree86 release. ... Tom Dickey Integration of xterm fixes. ...

... Using the self-consistent 3D hydrodynamical code in Kobayashi et al. (2007) , we simulate the star formation and chemical enrichment history of the Universe. ... We also predict the rates of supernovae and gamma-ray bursts, and the properties of the host galaxies, which will be observed with the ANU's new SkyMapper telescope. ... Supernova feedback on galaxy formation. ... Feedback from active-galactic nuclei (AGN). ... COALA : Universe Galaxy AGN Star Planet ...