... With a stack of input images, one can identify bad pixels by comparing the deviation of a pixel from the mean with a user­specified threshold times the clipping sigma. ... By uniform weighting, we mean that the weight is a constant for all pixels in an input image. ... In the code, the trimmed mean or median is used. ... If the error maps exist for input images, one does not have to compute the clipping sigma, because the sigma is available from the input error maps for each individual pixels. ...

. Home . News . Gallery . Events . Twitter . Press Releases . Links . Contact Us . Calendar . Press & Web Coverage . Previous . Next . List . Taken on the 24th November by John McConnell. It shows the ISS and an unidentified satellite . Friday, 2 January 2009 23:14 . International Year of Astronomy, Ireland National Node . [Back To Top] .

Next: References Up: No Title Previous: Observational data and reduction . ... A minor loss of information is due to the overestimation of the scattered light in the region of and to the broad emission lines and . On the diagrams are shown the blue-shifted absorption lines and the interstellar diffusion bands. ... In Table 1 are given only emission lines. Questionable features and the lines that fell within the gaps are not included in it, question-marks are for unreliable identification. ...

Microsymposium 38, MS067, 2003 (A4 format) SURVEY OF MARS CRATER TOPOGRAPHY FROM MOLA DATA. Michael G. G., European Space Agency, Research and Scientific Support Department, ESA/ESTEC, Noordwijk, The Netherlands, greg.michael@esa.int An algorithm for autonomous identification of crater centres from topography data has been improved in accuracy since [1,2] by taking account of the slope direction on the interior of the crater rim. ... References: [1] Michael G. G. (2002) Vernadsky-Brown 36, abs. ...

As a service to the astronomical community, we are recalibrating all archival Hubble Space Telescope Faint Object Spectrograph UV and optical spectrophotometry of active galaxies and quasars in order to extract uniformly calibrated spectrophotometric data for further detailed scientific investigations. ... NGC 4151 CLOUD F . NGC 5548 . ... NGC 4395 . ... NGC 4486 . ... NGC 4486 JET KNOT-A . ... NGC 4486 CLOUD-A . ... NGC 3031 . ... NGC 1068 . ... NGC 1068 CLOUD A . ... 1413+117A . ... NGC 4151 . ...

Star Formation in Extremely Faint Local Volume Dwarf Galaxies Sambit Roychowdhury with Jayaram N. Chengalur Ayesha Begum, Univ of W-Madison Igor D. Karachentsev, SAO, Russia September 14 , 2009 Faint Irregular Galaxy GMRT Survey (FIGGS) · Galaxies identified using the selection criteria: MB -14.5, HI Flux 1 Jy km s-1, Dopt 1', -40 · By far the largest study of HI in dwarf galaxies · Total of 62 ...

... 90-day forecast for X, Y, UT1-UTC. ... 6-year base period (~2190 points).For UT1-UTC and LOD tidal variations in the Earth rotation IERS Convention 2000 model excluded, then included and predictions are performed for differences. Trend of the second order modeled for all, except LOD. ... Autocorrelation function estimated from 6-year base period (~2190 points), last 200 are points used for prediction. For UT1-UTC and LOD predictions are performed for differences. ...

This module allows "anonymous" user access to authenticated areas. ... Source File: mod_auth_anon.c . ... This module does access control in a manner similar to anonymous-ftp sites; i.e. have a 'magic' user id 'anonymous' and the email address as a password. ... Anonymous_VerifyEmail The example below (when combined with the Auth directives of a htpasswd-file based (or GDM, mSQL etc. ) base access control system allows users in as 'guests' with the following properties: . ... Default: none . ...

OPTICAL IDENTIFICATIONS OF INTEGRAL / RXTE SOURCES WITH 1.5-METER OPTICAL TELESCOPE RTT150 I.Bikmaev (1,2), M.Revnivtsev (3,4) , R.Burenin (3) R.Sunyaev (3,4) , N.Sakhibullin (1,2) (1) Kazan State University, Kremlevskaya Str., ... 1, D-85741, Garching bei MЭnchen , Germany (3 (4) ABSTRACT We present the first results of our project on optical identifications of INTEGRAL / RXTE hard X-ray sources by using scientific instrumentations of the 1.5meter joint Russian-Turkish optical telescope RTT150. ...

Next: Feature enhancement: filtering Up: No Title Previous: Commentary . A sharp contrast is seen between the `crowded' energy map of the modulated oscillations (individual minima and maxima of the signal identified by the Mexican hat wavelet) in section 13 and and the `smooth' presentation of the norm-Morlet transforms of the same data in section 15. ... construct an energy map based on individual events. smooth the map by merging the events that are `close enough' to each other. ...

... Most HTML elements are identified in a document as a start tag, which gives the element name and attributes, followed by the content, followed by the end tag. ... To identify the document as being HTML 3.0, it is recommended that documents start with the prologue: <!doctype HTML public "-//W3O//DTD W3 HTML 3.0//EN"> . ... HTML 3.0 documents formally have the following structure: <HTML> <HEAD> head elements .. ... HTML> . ... The permitted syntax of HTML 3.0 compliant documents is specified by the...