... The sources J0512+166 (3C138) and J0738+177 at 2380 Mhz using the sband narrow receiver and the pntmod pattern (the same pattern used for the pointing model). The figures (.ps) ( .pdf )show the pointing errors, gain, and sefd. ... Figure 1 shows the zenith angle error versus zenith angle in arc seconds. ... Figure 6 top shows the ratio of GainPolA/GainPolB. ... Figure 6 Bottom is the ratio SEFDpolA/SEFDpolB. ... The sefd ratio matches pretty well with the Tsys values we get using the cal values. ...

Instrument Science Report WFC3 2008-06 WFC3 TV3 Testing: IR Channel Baffle Scatter Thomas M. Brown Apr 7, 2008 ABSTRACT In the first TV campaign (2004), problematic scatter was seen from the IR detector 's knife-edge baffle when a point source was scanned across its edge, implying that detector 's baffle was installed incorrectly. ... Background One of the tests performed in the current thermal vacuum (TV) campaign for WFC3 is a check for scattered light from the knife-edge baffle of the IR detector. ...

Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

. XMM-Newton Science Analysis System . arfgen (arfgen-1.75.6) [???] . Meta Index / Home Page / Usage and Examples . Here is another example with an explicit source position - (1000,-1000) in DET coordinates - specified: . arfgen spectrumset=spectrum.pha . withsourcepos=true sourcecoords=det sourcex=1000 sourcey=-1000 . See also 7.4 for details of why the task needs the source position, and how to change it. XMM-Newton SOC/SSC -- 2008-10-22

... The ROSAT Consortium (the Max-Planck-Institut fuer extraterrestrische Physik, the Goddard Space Flight Center, the Smithsonian Astrophysical Observatory, Leicester University, and the Astrophysikalisches Institut Potsdam) announces the release of the completed source catalogs of all ROSAT pointed observations. ... Detailed information about the catalog and methods of access to the catalog and data products can be obtained from the ROSAT Results Archive web pages in Germany, in the US, and in the UK:...

... Up: Science Data Pipelines . ... We designed and developed a package which simulates extragalactic point source data within a given field of view and SIRTF band. ... The simulator is modular and extensible to enable multi-wavelength simulations, has been optimized by utilizing parallel processing capabilities, and will be used to test pipeline software. ... The extragalactic simulator is capable of generating large numbers of galaxies within a given patch of sky for SIRTF pipeline testing. ...

... User Guide ] Task: uvfit Purpose: Fit point sources to a given vis file. ... Key: stokes Normal Stokes/polarisation parameter (e.g. i,q,u,v,ii etc). ... Key: object This gives the object type that uvfit fits for. ... Key: fix This gives a set a flag parameters, one parameter per source. Each parameter consists of a set of letters, which indicate which source parameters of a component are to be held fixed. These source parameters are fixed by the initial estimates given by the `spar' parameter. ...

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . FileљList . FileљMembers . ... python . ... axis . ptCorrFromObs.py . ... 10 љ def ptCorrFromObs (targObs, obj, inst, taiDate): . 11 љ """!Compute pointing correction position from observed coordinates . ... 13 љ @param[in] targObs position of target in observed coordinates (a coordConv.PVTCoord) . ... 24 љ - targPtCorrXY: position of target in pointing correction coordinates (a tcc.base.ArrayPVT2) (deg) . ... tcc.axis.rotFromObs.rotFromObs . ...

. Comment on J1239-1023 . No image is shown by Dallacasa et al. (1998) as they did not find the VLBI structure at 2.3 and 8.4 GHz prominent, just dominated by a compact region barel