Instrument Science Report WFC3 2004-012 Ambient Testing of UVIS Filter Ghosts Thomas M. Brown & Olivia Lupie July 22, 2004 ABSTRACT As part of the ambient testing done in advance of thermal-vac testing, we have obtained additional observations of the ghosts in the WFC3 UVIS channel. ... Our analysis of the F606W, F280N, and F225W images shows the same ghosting observed previously, and documented in ISR WFC3 2004-004. ... The F225W images show large donut ghosts from the filter substrate interfaces. ...

Next: Filter descriptors Up: Instrument configuration and Previous: Columns REDLEAKRLTYPE, . Properties of the instrument that are associated with the instrument as a whole, rather than with a particular filter or detector channel, belong in descriptors in the instrument table file. ... The descriptors are summarized in Table . Filter descriptors . Descriptor NFILTCAR . Character descriptor FILTCAT . Character descriptor FILTSTAT . ... Mon Jan 22 15:08:15 MET 1996 ...

... 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 . ...

Next: Identifications and Efficiency Up: THE DEEP X-RAY RADIO Previous: Source Classification . ... For some sources which did not have NVSS positions before the time of optical observations, arcsecond positions from the Texas survey (Douglas et al. 1996) and NED (typically based on VLA data) were used. ... All X-ray/radio sources without counterparts on the survey plates were imaged at either the KPNO 0.9m or the CTIO 0.9m telescopes. ... Previously Identified Sources . Sample Properties . ...

... Bojan Nikolic web pages (r. 329) . ... Building the casa-core libraries . ... Building the dependencies . Building casa-core itself . Building CASA . Building CCMTools as required by CASA . ... A prototype build system for CASA using SCons . Notes on the classic CASA build . ... Building libAIR . ... Hierarchical builds . ... Shared-library builder . Multi-action builders . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

Next: CAL_getBoresightMatrix Up: Routines of the Calibration Previous: List of CCF Components Contents . ... The CAL functions CAL_getBadPixelList & CAL_getBadPixelMap use the CAL state variable temperature only to check that the current operating temperature is consistent with the CCF constituent BadPix . ... Used CAL State Variables . List of CCF Components used . ... Next: CAL_getBoresightMatrix Up: Routines of the Calibration Previous: List of CCF Components Contents Michael Smith 2011-09-20 ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

... 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 . ...

... The plotter allows various annotations (lines, arrows, text and ``spans'') to be added to the plot. ... The values are in world coordinates. ... axhline(y, xmin, xmax) . ... avhline(x, ymin, ymax) . ... xmin, xmax) . Overlay a transparent colour rectangle. ymin and ymax are given in world coordinates while xmin and xmax are given in relative coordinates . ... Overlay a transparent colour rectangle. ymin and ymax are given in relative coordinates while xmin and xmax are given in world coordinates . ...

... Transforms a qpoe file according to the specified parameters. ... Any type of filtering can be applied to the input qpoe file, including region filtering. In addition, the size of the output event record can be different from the size of the input event record. Of course, usually one makes the output record equal to or smaller than the input. If the output record size is made greater than the input record, a warning is issued and the ``extra'' part of the record is undefined.) ...

Next: The Transmission Gratings Up: The Instruments Previous: The Instruments . ... A conventional cross-grid charge detector reads out the photo-induced charge cloud and the electronics determine an arrival time to 16s, and the position with a resolution of about 18 m or 0.37 arcsec. ... The Massachusetts Institute of Technology's Center for Space Research, in collaboration with Lincoln Laboratories, developed the detector system and manufactured the CCDs; Lockheed-Martin integrated the instrument. ...

... hstpolima: Reduce linear polarization data for HST instruments (currently FOC, NICMOS and WFPC2 are supported). ... Images for the three Stokes parameters (I,Q and U), the linear polarization and position angle and their error images are output. hstpolpoints: Reduce linear polarization data for HST instruments for a set of circular apertures. ... There is a web page http://www.stecf.org/software/impol/ briefly describing the package and giving example polarization maps for HST and model data. ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Previously understood that magnetic fields were directly related to rotation, so when I read that Mars, like Venus, didn't have one, my understanding crumbled. What exactly causes magnetic fields in planets? ... RELATED TOPICS: MAGNETIC FIELD . Planetary magnetic fields are definitely related to rotation, but directly not so much. ... Get instant access to subscriber content on Astronomy.com! ...

Next: Performance Up: annrep2003 Previous: Staff Movements . The principal objectives for 2003/2004 were to: . ... strengthen the Observatory's research capability in solar system and stellar astrophysics; . ... The key task for the year was to continue to work with the DCAL with the aim of widening the Observatory's access to research development funds and so strengthening the Observatory's research capability. ... Objectives for Financial Year 2004/2005 . ... 2004-05-18 ...

... The path of the dome will now follow a different track in focus. ... The dome was set to 19.6 degrees. ... Focus curves taken with sbn (.ps) ( more info ) show the offset (in inches) from the the platform reference position (1256.22 feet). ... Moving the ref ch position from 8.84 to 18 degrees will raise the platform corner by .7 inches.7 platform inches is 1.7*.7 is 1.2 tie down inches of stroke .7 platform inches is 3.5 degrees F. The path length will increase by .1 in (za=2) to .8 inches (za=20)....

Contents] [Previous page] [Next page] Index] . This book describes how to use Dynamic HTML to incorporate style sheets, positioned content, and downloadable fonts in your web pages. ... Introducing Style Sheets . ... Style Sheets in Communicator . Using Cascading Style Sheets to Define Styles . ... Defining Style Sheets with the <STYLE> Tag . Defining Style Sheets in External Files . ... Combining Style Sheets . ... Style Sheets Ink Home Page . ... Positioning HTML Content Using Styles . ...

... We publish 16 Doppler imaging temperature maps for the years 1994-2002 of the active RS CVn star II Peg. ... Through Doppler imaging we want to study the spot evolution of the star and in particular compare this with previous results showing a cyclic spot behaviour and persistent active longitudes. ... The derived temperature maps are quite similar to the ones obtained earlier with a different methods, the main differences occurring in the spot latitudes and relative strength of the spot structures....

... PUL2 catalog contains original absolute proper motions of 59646 stars in 149 fields with galaxies. ... Mean errors of relative proper motions in PUL2 catalog is 5.5 mas/year. ... The external mean error of one relative proper motion of a bright star of PUL2 catalog is 9 mas/year for both of coordinates. ... After issue of UCAC2 catalog, we decided to improve accuracy of proper motions, using Pul-3 coordinates (of 1950s) as the first epoch, and UCAC2 coordinates as the second epoch. ...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

... Meade Instruments Corporation . ... Autostar Computer Controllers . 497 Autostar . ... One of the most important advances in telescope control in the past 25 years, the Meade #497 Autostar Computer Controller turns the ETX into an automatic celestial object locating system. ... The #497 Autostar Computer Controller plugs into the control panel of ETX-90EC, ETX-105EC, and ETX-125EC telescopes and enables automatic location of more than 30,000 celestial objects. ... about meade | ... Meade 4M | ...