... While much high spatial frequency information in the image is permanently destroyed by smearing with the response of the "fat" pixels, the quality of the image can nevertheless be greatly improved by combining sub-pixel dithered images. ... Another standard simple linear technique for combining shifted images, descriptively named "shift-and-add", has been used for many years to combine dithered infrared data on a finer grid. ... Drizzle runs under the NOAO image processing software IRAF. ...

Next: Version 9.0 Up: Old Releases Previous: Version 9.3 Contents . ... Version 9.2 was released on March 10, 2010. ... Feb. ... RCW. With disk recordings, when there is a recording scan (period with no recording gap between source scans) of more than a bit over an hour, issue a warning and admonition to put in gaps. ... March 7, 2010, RCW. ... Various updates of examples and manual for changes related to change to the DiFX software correlator on the VLBA. ... 17, 2010 RCW. ... 4, 2009 RCW . ...

... Public . Science . ... Science Users Information > Science Publications > Science Announcements > New Release of Images and Source lists for VPHAS+ . ... Observing with ESO Telescopes . ... New VST Public Survey data products resulting from the VST Photometric HЮБ Survey of the Southern Galactic Plane (VPHAS+) are now available via the dedicated Phase 3 query interface at the Science Archive Facility . ... The VPHAS+ public survey data release is accompanied by a comprehensive description . ...

... The stars examined here were primarily culled from two lists of X--ray sources in Orion. ... The second region is two degrees in extent east--west and ten degrees north--south with Orionis being near the northern edge. ... In the end, two main regions were chosen for monitoring: stars near Orionis and stars northwest of the belt of Orion. ... The PSPC identified 22 sources within 15 of Orionis in addition to the sources listed in Table 1 , giving a total of 85 X--ray sources in the Orionis region. ...

... 2MASS Overview . The 2MASS Sky . Executive Summary of 2MASS Second Incremental Data Products . Point Source Catalog . Extended Source Catalog . ... Distribution Mode for 2MASS Products . Data Release Plan . ... Point Source Catalog (PSC) . Extended Source Catalog (XSC) . ... 2MASS Source Naming Convention . ... General Properties of the Data Release . ... Comparison of Achieved Performance of Second Incremental Release Catalogs with Level 1 Science Specification . ...

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

... SciSim release covered by this note . ... Data-Analysis-with-SAS in a simple and standardised way, and should allow calibration experts to re-assess the reliability of the different elements of XMM-Newton simulations. ... Also, a release of all calibration files to be used in the reduction, through the SAS, of SciSim generated data, is coordinated with this release. ... Furthermore, two SAS tasks (odffix and epicproc) had to be updated to make possible a proper SAS data reduction of simulated data. ...

... Astrophysics Group . ... The 9C survey of radio sources was made with the Ryle Telescope at a frequency of 15.2 GHz and a resolution of 25ТљxТљ25Тљcosec(dec) arcsec 2 . ... Waldram, E.M., Pooley, G.G., Grainge, K.J.B., Jones, M.E., Saunders, R.D.E., Scott, P.F., Taylor, A.C., 2003, MNRAS, 342, 915 . ... Field name . ... It comprises seven fields, each delineated by boundaries in RA and Dec, together covering a total of 114.7 deg 2 for which the source catalogue is complete to ~ 10 mJy. ...

... Galileo Probe . The Galileo spacecraft was designed to study Jupiter's atmosphere, satellites, and surrounding magnetosphere for two years. ... From there, Galileo will spend more than five years traveling to Jupiter, where it will become the first spacecraft to make direct measurements from an instrumented probe within Jupiter's atmosphere. ... This image, taken by the Hubble Space Telescope, shows the predicted site at which the Galileo Probe will enter Jupiter's atmosphere on December 7, 1995. ...

... Up: Algorithms . ... The imaging problem can be described as an optimizing problem in mathematics. ... Computer simulations of rotating modulation collimator imaging show that the quality of images from this method is better than that from the traditional cross-correlation method. ... The imaging problem is: . ... The results show that this algorithm can be used in the imaging problem and usually results in a better image than that obtained from a traditional method such as cross-correlation. ...