Space Telescope Science Institute . ACS Instrument Handbook Cycle 19 . ... Advanced Camera for Surveys Instrument Handbook for Cycle 19 > Chapter 10: Imaging Reference Material > 10.2 Using the Information in this Chapter . ... 10.2.2 Signal-to-Noise . ... This chapter contains plots of throughputs for each imaging mode. Section 9.2 explains how to use these throughputs to calculate expected count rates from your source. ... For the CCD, ?counts? is the number of electrons detected. ...

Еще в разделе: (Показать все результаты (>18767) - www.stsci.edu/ )

• ACS Instrument Handbook for Cycle 20
• WFC3 Instrument Handbook
• COS Instrument Handbook

... Omdetect uses two different algorithms for source-detection - one is optimised for detecting point-like sources, and the second is optimised for detecting extended sources. ... Two separate lists are used mainly because the detection algorithms for point and extended sources are different, and also because the photometry of the two types is done differently. ... The number of pixels that an extended source contains. ... Point-source detection algorithm . ... Extended-source detection Algorithm . ...

Еще в разделе: (Показать все результаты (>15463) - xmm.vilspa.esa.es/ )

• Use of edetect_chain
• Description

This source is hiding behind our Galaxy at a distance of ~18 Mpc, located at a galactic latitide of 0 degrees. ... As we look towards longer wavelengths, 60 micron, to try and penetrate the Galactic Plane, we still see confusion from galactic sources. ... If the image seems some what confusing that is because the MOST is a continuum radio telescope and when it looks in the direction of our Galaxy it detects radiation from sources within our Galaxy and from sources that may lie behind our Galaxy. ...

Еще в разделе: (Показать все результаты (>7307) - www.atnf.csiro.au/ )

• Weighting
• Research - All-sky map of high-velocity clouds
• Australia Telescope National Facility

... Magnetic Field . ... The atoms of oxygen, for instance, contain electrons with negative electric charges and protons which are positive, but the two charges balance each other andthe electric and magnetic forces cancel. ... It can be shown that such free electrons and ions will be guided by the magnetic field lines (or "lines of force") which rise from near the southern (magnetic) pole and enter the Earth again near the northern pole. ... Reversals of the Earth's field (4 queries) . ...

Еще в разделе: (Показать все результаты (>1105) - www.cosmos.ru/ )

• Polar Orbiting Satellites
• Main results of the experimental and theoretical research completed in 2010
• The Wind Spacecraft

Next: Storage format Up: File Formats Required Previous: Column label: MOONALT . Information specific to a particular instrument is not so easy to categorize. ... Columns BAND and NBAND . Column FILTCODE_ n . Column NDVALUE . Column NDETUSED . Columns REDLEAK, RLTYPE, and MAKER . Instrument descriptors . ... Character descriptor FILTCAT . Character descriptor FILTSTAT . ... Columns NDET and DETNAME . Column DETCODE . Column DET . ... A simple photometer . ...

Еще в разделе: (Показать все результаты (>2174) - www.sao.ru/ )

• Instrument file
• Echelle Spectra
• Fitting the Blaze Function

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2010 December 27 . One Million Galaxies . Credit: 2MASS , T. H. Jarrett , J. Carpenter, R. Hurt . ... Many galaxies are gravitationally bound together to form clusters , which themselves are loosely bound into superclusters , which in turn are sometimes seen to align over even larger scale structures . ... About APOD | ...

Еще в разделе: (Показать все результаты (>8052) - www.sai.msu.su/ )

• APOD: 2010 October 25 - Water Ice Detected Beneath Moons Surface
• APOD: 2001 July 25 - Hot Gas Halo Detected Around Galaxy NGC 4631
• APOD: 2003 September 17 - The 2MASS Galaxy Sky

... Up: Iraf Packages . ... IRAF Group, NOAO 1 , PO Box 26732, Tucson, AZ 85726 . This paper describes a new IRAF spectroscopy exposure time calculator. ... SPTIME takes an input source spectrum, either a reference blackbody, power law, or a user spectrum, a background ``sky'', observing parameters such as exposure time, central wavelength, seeing, airmass, and moon phase, instrument parameters such as aperture sizes and detector binning, a description of the spectrograph, and desired output. ...

Еще в разделе: (Показать все результаты (>1770) - www.adass.org/ )

• ETCs and Observations Simulation at the VLT
• ADASS 2003 Conference Proceedings
• Using XML and Java for Astronomical Instrument Control

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to Guesthouse . ... Survey Telescopes . ... Image Comparisons . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... The top panel shows compact sources of submillimetre radiation detected by APEX as part of the ATLASGAL survey, combined with complementary data from ESAтАЩs Planck satellite, to capture more extended features. ... Milky Way . ...

Еще в разделе: (Показать все результаты (>66614) - www.eso.org/ )

• Comparison of the central part of the Milky Way at different wavelengths
• Optical Instrument Exposure Time Calculator
• SINFONI Exposure Time Calculator

... It allows observations of extended and starlike objects in different modes: CCD photometry, panoramic spectroscopy with the Fabry-Perot interferometer, spectroscopy and spectropolarimetry with a "long-slit", slit-free spectroscopy, multi-object spectroscopy. ... Digital servo drives that were installed have improved the reliability of the complex, extended the range severalfold, and reduced the telescope's speed control step. ... A software and hardware set for the BTA control system was implemented...

Еще в разделе: (Показать все результаты (>240) - mavr.sao.ru/ )

• Detection of Radio Transients and Variable Radio Sources Using the Archive Data
• V1494

Magnetic field measurements onboard the Interball Tail spacecraft are carried out by the FM-3I instrument which consists of two flux-gate magnetometers covering two different ranges: [-200, +200] nT and [-1000, +1000] nT. Besides scientific goals, the FM-3I experiment data is used to perform the attitude control of the Interball Tail spacecraft. ... August 22, 1995 . ... October 18, 1995 . Top of the page . ... Back to the Interball Home Page . ...

Еще в разделе: (Показать все результаты (>733) - www.iki.rssi.ru/ )

• Sensors
• The Magnetosphere
• Polar Orbiting Satellites

Astronomy Picture of the Day . ... 11.03.1997 . ... Credit: The Galileo Project , JPL , NASA Explanation: What happened to Jupiter's Great Red Spot ? Operating at a chilly 55 degrees Kelvin , the Galileo Spacecraft's Near Infrared Mapping Spectrometer (NIMS) recorded this composite image of Jupiter's Great Red Spot in late June 1996. ... March 1997 . ... 1995 1996 . 1997 1998 . ... NASA Official: Jay Norris. ... Publications with keywords: Jupiter . Publications with words: Jupiter . ...

Еще в разделе: (Показать все результаты (>73158) - www.astronet.ru/ )

• Journal "Peremennye Zvezdy"
• XWare > APOD

TUI supports the following offsets: . Object Arc offset by a given amount on the sky (i.e. along the arc of a great circle). ... Arc offsets are useful for moving a different portion of your object or a different nearby object onto the boresight . ... Object Arc XY this is identical to an Object offset except that it has been rotated to align along the instrument x-y axes. ... This is just like the Calibration XY offset, except that it is typically cleared when you slew to a new object. ...

Еще в разделе: (Показать все результаты (>852) - www.apo.nmsu.edu/ )

• Instrument Orientations and Offset Directions
• TUI:Instruments:Expose Window
• ARC 3.5m | Instrumentation

Solar Large-Scale Chains: Some Events . ... The chains appear to light up separators or quasi-separatrix layers between different interacting large-scale magnetic flux systems in the global solar magnetosphere and, in particular, to outline large-scale coronal structures involved in the CME process. ... Some features of the chains and their relations to CMEs are illustrated for a number of halo CME-associated events. 23 events of 1997-2000 . ... Halo-CME-associated events of November 1997 . ...

Еще в разделе: (Показать все результаты (>495) - www.izmiran.rssi.ru/ )

• [INTERBALL] pr-7

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

Еще в разделе: (Показать все результаты (>297) - www.gao.spb.ru/ )

• Extended time series of Solar Activity Indices

... The SMS program is a critical endeavor to investigate whether the predictions of standard cold dark matter cosmology are consistent with the observed matter distribution in the Milky Way halo. It is the deepest, most extended search for optically elusive dwarf satellite galaxies and tidal streams to date, covering the entire Southern hemisphere. ... However only a few dwarf satellites have been found around the Milky Way to date - 22 dwarfs compared to 500-10,000 predicted by theory (Klypin et al. ...

Еще в разделе: (Показать все результаты (>684) - www.mso.anu.edu.au/ )

• GSAOI Instrument Description Page
• GSAOI Orion Nebula Cluster Science Page
• Showcase

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

Еще в разделе: (Показать все результаты (>28) - www.vista.ac.uk/ )

Pixels , slits and facets for the NGST NIRSpec: Appendix ST-ECF Instrument Science Report NGST 2002-01a Pixels , slits and facets for a MEMS-type spectrograph for NGST Appendix : Extension to different PSF and detector properties Santiago Arribas, Peter Jakobsen, Robert Fosbury Wolfram Freudling --1-- ST-ECF Instrument Science Report NGST 2002-01a Pixels , slits , and ... This PSF meets the two requirements established by Bely et al. for the OTA optical quality. ...

Еще в разделе: (Показать все результаты (>241) - www.stecf.org/ )

• VLT First Light
• VLT Status and Instruments
• HST NICMOS Observations of Circumstellar Matter Around CYG X-3

... Meade Instruments Corporation . ... Meade Pictor XT-Series CCD Autoguider/Imagers . ... Take new sets of calibration frames if the temperature changes significantly.(or change the set you are using or the scaling if you are reusing calibration frames). ... You can also use scaleable dark frames called thermal frames. ... However, if you wish to reuse dark frames with images of different exposure times, you must turn the dark frame into a thermal frame by subtracting the bias information. ...

Еще в разделе: (Показать все результаты (>2506) - www.meade.com/ )

• Meade Instruments - Telescopes, Solar Telescopes, Binoculars, Spotting Scopes
• Meade Instruments Corporation - Choosing the Right Microscope
• Meade Instruments Corp. - Meade Customer Support

Next: Gamma-Ray Bursts Up: Detection rate of binary Previous: Detection rate of binary . Figure: A schematic dependence of the detection rate ratio on the detector sensitivity (the upper scale) and the limiting distance from which binary NS (1.4+1.4M , the middle scale) and binary BH (8.5+8.5M , the bottom scale) mergings can be detected. ... At the end of this segment evolutionary effects can affect the detection ratio (the dashed line). ...

Еще в разделе: (Показать все результаты (>385) - xray.sai.msu.ru/ )

• AXAF-Chandra
• Detection rate of binary compact star merging
• The X-ray Optics

... Team . ... All the results we present were obtained with the SCORPIO instrument mounted at the 6-m telescope of SAO RAS. TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1090 SUBJECT: GRB001109, Host Galaxy Spectroscopic Observations DATE: 01/09/08 07:28:47 GMT FROM: Vladimir Sokolov at SAO RAS <sokolov@sao.ru> . ... TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1092 SUBJECT: GRB001109, Host Galaxy Astrometry DATE: 01/09/11 08:19:24 GMT FROM: Vladimir Sokolov at SAO RAS <sokolov@sao.ru> . ...

Еще в разделе: (Показать все результаты (>852) - jet.sao.ru/ )

• Laboratory of spectroscopy and photometry of extragalactic objects :MOUSER
• Results scientific researchs LRS
• My publications