... Sources found in the local detection step (task eboxdetect ) at significance levels (column SIGMA of eboxdetect source list) exceeding a user-specifiable threshold (input parameter mlmin ) in the respective energy band are removed from the image using a suitable PSF and source brightness dependent cut-out radius (determined to be the radius at which each source contributes more than a user-specifiable number of counts/arcsec to the background; parameter scut ; default value: 0.01). ...

... We describe some results of a study for a possible HST instrument, namely an area spectrograph combined with a simplified version of the High Speed Photometer. The spectrograph samples a two-arcsecond diameter area with up to 37 spectra, each with an angular resolution of 0.14 arcseconds. ... Two instruments are mounted in the old HSP axial enclosure: a simplified High Speed Photometer and an area (``3-d'') spectrograph (shown schematically in Figure 1 ). ... The spectrograph covers 2000 ? ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... It has been argued in the literature that low surface brightness (LSB) galaxies might contribute a considerable HТљ I cross section. ... Figure 3: The column density distribution function ( left ) and HТљ I mass density ( right ) for high and low surface brightness galaxies. High surface brightness galaxies dominate the HТљ I cross section, especially for column densities . ...

... It is notoriously difficult to identify weak cosmic ray events in long exposure observations. ... The method is to compare the probability distribution function (PDF) of cosmic ray events between an observation and a dark frame matched in exposure time. We illustrate the basic idea using dark exposures from a Tek 1024 1024 CCD with varying exposure lengths and read-out times. ... Figure: Histogram of cosmic ray events in a two hour dark frame. ... Original PostScript figure (78 kB) . ...

... General Catalog of Variable Stars (GCVS database, Version 2012 Feb.) ... The cross-identification tables of the General Catalogue of Variable Stars (GCVS) contain all GCVS (including extragalactic variables from vol.V), NSV (New catalogue of Suspected Variable stars) and Supplement to the NSV stars as well as stars from the name-lists of variable stars nos. 67 - 80; it also makes it possible to find out identifications between the GCVS and the NSV catalogue. ... I-III) names are included. ...

Bright sources . with CATS-identifications) . Galactic plane sources . ... 3CR sources . ... Trushkin, 1999) . 1Jy-sources . ... COLD"-sources, DEC=5d . Bursov, 1996) . 9C sources . Waldram+,2003) . ... VSOP sources . ... Taylor, 2001) +CATSidn . PMN-sources . Mingaliev+ 1999) +CATSidn . CLASS sources . ... WMAP sources . Trushkin, 2003) . NCP-sources . Mingaliev+ 2001)+CATS idn . ... Konnikova+,1989) +CATS idn . ... 1996 Nizhnij Arkhyz . ...

I'm glad you're interested in collaborating on the ConcepTests for Astronomy WWW database project! ... I'm looking forward to your contributions! ... a) high luminosity, high temperature to low luminosity, low temperature . b) high luminosity, low temperature to low luminosity, low temperature . c) high luminosity, low temperature to low luminosity, high temperature . d) high luminosity, high temperature to low luminosity high temperature. ... Back to Paul Green's Peer Instruction page. ...

... NGC 1530 is one of the largest barred spiral galaxies in the northern sky, with bright CO emission. ... To trace molecular gas, we observed the line, with the IRAM Interferometer. ... Properties of NGC 1530 and observational results . ... Then in a frame rotating with the potential, the periodic orbits are ellipses either parallel to the bar ( ) or perpendicular ( ), depending on the radius of the orbit. ... We observed the molecular gas in the bar of NGC 1530, a barred SBb spiral in the line. ...

Visual Discovery of SN 1996bk in NGC 5308. ... Of course we are pleased when we make a discovery, but visually observing galaxies is our real pleasure; supernovae may be the "rational" motive to look at a galaxy. ... Back to science.. ... Some 30,000 observations in four years on a programme of 600 to 800 galaxies (priority is given to the northern ones) have produced two official supernovae, one in 1995 and this one. ... We would like to thank the amateurs directly involved in confirming 1996bk. ...

... public class TiffDecoder . ... static int . ... Field Detail public static final int NEW_SUBFILE_TYPE . ... public static final int IMAGE_WIDTH . ... public static final int IMAGE_LENGTH . ... public static final int BITS_PER_SAMPLE . ... public static final int COMPRESSION . ... public static final int PHOTO_INTERP . ... public static final int IMAGE_DESCRIPTION . ... public static final int STRIP_OFFSETS . ... public static final int ORIENTATION . ... public static final int SAMPLES_PER_PIXEL . ...

... We have observed and studied critical supercurrents, Ic, in cross-type Nb-Cu/Ni-Nb junctions with Josephson layers prepared from diluted ferromagnetic alloys. For suitable values of the exchange energy in the ferromagnet and the F-layer thickness we have observed Ic(T) oscillation with vanishing Ic for the definite values of T and dF. ... Critical supercurrents, Ic, in Nb-Cu(1-x)Ni(x)-Nb Josephson SFS junctions with F-layers prepared from ferromagnetic Cu(1-x)Ni(x) alloys have been studied. ...

... He made observations of a supernova (literally: nova= "new star") in 1572 (we now know that a supernova is an exploding star, not a new star). ... Brahe's meticulous observations showed that the supernova did not change positions with respect to the other stars (no parallax). ... This was early evidence against the immutable nature of the heavens, although Brahe did not interpret the absence of parallax for stars correctly, as we discuss below. Brahe made careful observations of a comet in 1577. ...