... NICMOS Data Handbook > Chapter 4: Anomalies and Error Sources > 4.6 Flat Fielding . 4.6 Flat Fielding . ... NICMOS flat fields show response variation on both large and small scales. ... The flat-field variations are due also to a strong function of wavelength. ... That paper describes methods for constructing color-dependent flat-field reference files, and provides IRAF scripts for doing so (currently applicable to Cycle 7 and 7N data, but see the NICMOS Web page for updates on this script). ...

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. ...

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. ...

... The ROSAT PSPC exposure and background maps are 128 128 images (60 pixels) linearly replicated to yield 512 512 arrays (15 pixels). NB: The HRI background map is also , but with 8 pixels.] ... cl> images im> magnify rp110590_mex rp110590_mex_demag dx=4 dy=4 inter=linear # yields a # 128*128 exposure map, i.e., true resolution im> magnify rp110590_mex_demag rp110590_mex_15 4 4 inter=spline3 # yields a # 512*512 map with # 15'' pixels generated using a # 3rd order spline interpolation . ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Facilities . ATNF facilities . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... Apache HTTP Server Version 2.2 . ... Additional functionality allows webmasters to configure the response of Apache to some error or problem. ... 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). ... Custom Error Responses and Redirects . ... In addition to these new variables, Apache will define REDIRECT_URL and REDIRECT_STATUS to help the script trace its origin...

... 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_ . ...

... The improvement will be more pronounced in our crowded Wide Field Camera (WFC) images, and may be increased further through use of a more sophisticated method of combining the individual dithered images. Our analysis allows us to check for point spread function shape variations in the HST Planetary Camera (PC) field. ... In crowded field images, we are deriving information about the faint end of the luminosity function (LF) from the texture of the image background. ...

The Cosmic Microwave Background Radiation Temperature Work in groups of 2-4. ... Due 1999 April 15 In this laboratory exercise, you will use the radio telescope on the roof of Science B to measure the intensity of the Cosmic Microwave Background Radiation (CMBR). ... The output of the telescope when pointing at the sky will then be 2 Tsys = Trec + Tsky : The temperature of the sky can in principle arise from two sources, radiation from the atmosphere and radiation from outer space (the CMBR). ...

... Observatory . ... Science . User Portal . ... Science Users Information > Science Publications > Science Announcements > Response to USD User Satisfaction Survey . ... The User Support Department ( USD ) would like to thank all those Principal Investigators and their Phase 2 delegates who filled in the on-line User Satisfaction Survey. ... A summary report of the latest User Satisfaction Survey is now available . The USD User Satisfaction Survey survey itself is always available on-line . ...

... 2*1018 /1/2, , 0.1 , 1.6 , 1 350 , 100 , 5*10 20 - 3. 10-100 10-100 , . ... Integrated structures comprising cold electron bolometers and twin-slot antennas have been studied in the temperature range 0.06-3 K. Dynamic resistance ratio and optical response was measured for 2-15 K black body radiation temperature. ... 12000 290 10000 RR Te 280 Electron temperature, mK 270 Resistance ratio, Rd/Rn 8000 260 250 6000 240 4000 230 220 210 0 50 100 150 200 250 300 2000 Phonon temperature, mK 3. ... 0.1 . ...

Astronomy Discussion Forums . Forums: . ... Discussion Forums . ... Just A Little Background On Dick . Forum List | ... Post Message | ... Posted by Harvey on November 25, 2002 21:07:26 UTC . ... He knows a lot of math, probably more than anyone on this forum. ... 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" . ...

... Grant of RFBR #97-05-64085 . ... The project goal is the investigation of the global storm-time variations of electron density and temperature and dynamics of the topside ionosphere structure (day-side cusp, auroral oval, main ionospheric trough, ring ionospheric trough, subauroral Te peak and equatorial anomaly). ... The background Ne distribution at the height of ~430 km for the quiet night-time equinoctial conditions from the Cosmos-900 data is constructed and investigated - Fig.5. ...

Members of AVEC, the Armagh Visitor Education Committee , recently joined forces for a Disaster Planning and Prevention workshop at the Armagh Observatory on 28 September 2005. ... In this case the partner bodies within AVEC were focusing particularly on the individual specialist requirements of the small public bodies of Armagh, each of which have items of significant historical interest within their libraries, archives and museum collections. ...

... 11/09 - Dave's response . Some of you have probably seen this original letter floating around the internet. Read Dave's (whoever he is) response below. ... I don't know who David is, but his response is hilarious!! ... At first I rolled my eyes....then I read Dave's response and I couldn't have said it better if I had all day to do it." ... September 11th is the 254th day of the year: 2 + 5 + 4 = 11 . ... Wait a sec ... just realized "YOU CAN'T HIDE" also has 11 letters! ... Help me!! ...

Next: Status and Goals of Up: NICMOS Data Calibration and Previous: NICMOS Data Calibration and . ... CALNICB Processing . ... Combining NUMITER Images . ... The Space Telescope Science Institute (STScI) data reduction and calibration pipeline for the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) is composed of two major tasks, CALNICA and CALNICB. ... NICMOS, calibration, pipeline, software . ... CALNICB combines images into mosaics and also removes background signal from the images. ...

... 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. ...

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Общая Астрономическая Конференция > Практика > Астрономический наблюдательно-информационный портал > Хвостатые гостьи (все о кометах) > C/2014 G1 (PanSTARRS) - 50-ая Panoramic Survey Telescope & Rapid Response System (Pan-STARRS)! ... Просмотр полной версии : C/2014 G1 (PanSTARRS) - 50-ая Panoramic Survey Telescope & Rapid Response System (Pan-STARRS)! ... Блеск кометы C/2014 G1 (PanSTARRS) на момент открытия соответствовал н/д.. ... C/2014 G1 (PANSTARRS) 2014 04 07.48 19.2 T U69 . ...

. J. Theor. Biol. 177, 215-236, 1995. Jacques Lewalle, jlewalle@syr.edu