... Many thanks to Peter Paice who sent us an image of a solar prominence he took with a Philips webcam on 12 April at 14.00. Rather a poor 'pixillated' image" he says - but I think it shows the structure of the prominence in great detail. Thanks again, Peter for sending us this nice image! Tuesday, 21 April 2009 12:59 . International Year of Astronomy, Ireland National Node . ...

Parameters of selectable CCD area array. CCD . ... Pixel size /Photo area HxV . ... QE max . ... e - /mkJ/cm 2 . ... 3 CDS out, TI . ... 30 IRf . 25 typ . ... Typ 27 /21 . ... max 5-6mV . ... 1024 x 512 . ... max 5mV . ... 15 V/mkJ/cm 2 (760 nm) . ... MPP/0 . ... 27 typ IRf . ... 0.4 typ/ CDS/45 . ... 12 typ IRf 640nm . ... 3.8-4-4.2 min-typ-max values . ... 2 TE cooler –U=12V, I=1.5 (max 2) A, T CCD =-45 …-35 typ, Heat sink power load =19 (26 max) W. 3 D T=60 , U=2.5 V, I=0.7 A, P 2.5 W . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Our people overview . ... Publications overview . ... Careers overview . ... ATNF facilities . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Virtual Radio Interferometer . ... CSIRO ATNF Data Archives . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ...

... Therefore, if the dithered images do not uniformly sample the field, the center of light in an output pixel may be offset from the center of the pixel, and this offset may vary between adjacent pixels. ... Figure 3.4: PSF Resulting from Non-uniform Sampling . PSF is taken directly from the HDF-N F450W drizzled image and shows substantial variation about the Gaussian due to the effects of non-uniform sampling, as well as possible additional charge-transfer effects in the CCD. ...

ACTIVITY 3 . ... In this activity, students observe the design of outdoor lighting and discuss how this affects the efficiency and effectiveness of the job which the lighting is intended to do and the degree of light . ... More advanced students may also observe and describe the spectrum of the outdoor lighting and how that is related to the effectiveness of the lighting and to the degree of light pollution. ... An Example: The Light Pollution Project in the Schools in Greece . ...

... The algorithm, known as Variable-Pixel Linear Reconstruction (or informally as ``drizzling"), preserves photometry and resolution, can weight input images according to the statistical significance of each pixel, and removes the effects of geometric distortion both on image shape and photometry. ... Drizzling'' maps pixels in the original input images onto the pixel grid of a subsampled output image, taking into account shifts and rotations between images and the optical distortion of the camera. ...

XMM ­Newton CCF Release Note XMM ­ CCF ­REL­5 EPIC Energy Scale D Lumb October 3, 2000 1 CCF components Name of CCF VALDATE List of Blocks changed CAL VERSION XSCS flag EMOS1 ADUCONV 0008 2000 ­01­01T00:00:00 ADUCOEFF OFF­ SET GAIN EN­ ERGY COMBINE YES EMOS2 ADUCONV 0008 2000 ­01­01T00:00:00 ADUCOEFF OFF­ SET GAIN EN­ ERGY COMBINE YES EPN ADUCONV 0009 2000 ­01­01T00:00:00 ADUCOEFF OFFSET GAIN ... For MOS Timing Mode, the gain was incorrect in hardware from mission start until ca. ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Observing . ... solar system . ... Observe the Solar System . Astronomy for Kids . ... Observing the bright stuff . ... At times shining brighter than magnitude ?4, Venus outshines all other objects in the sky except the Sun and Moon. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... The world standard in telescope oculars, Meade Series 4000 eyepieces yield the widest possible fields of view, consistent with pinpoint edge-of-field sharpness and long eye relief and yet with extremely low astigmatism, spherical aberration, and off-axis color. ... Your Series 4000 eyepieces are superb, with the Super Wide Angle 32mm and Ultra Wide Angle 14mm (two incredible eyepieces) being particular favorites of mine. ... Meade Series 4000 8mm - 24mm Zoom Eyepices (1.25") . ... about meade | ...

... Astrophysics Group . ... Work begins on the world?s most powerful radio telescope . ... SKA AAVS0 array . ... SKA Aperture Array in Australia . ... Even in its earliest phase (SKA1), the radio telescope will be the fastest and most sensitive in the world. ... A further two instruments will be in the Western Australian desert: one being an array of many hundreds of aerial clusters working at low radio frequencies, the other a range of around 90 dishes ? ...

... A2302 Date Received: 2007-Feb-01 17:03:45 Technical Page Proposal Type: General Category : Sub- Category : Observation Category : Total Time Requested: Minimum Useful Time: Prop osal Title: Regular Astronomy Spectroscopy Galactic 6 Hours 1 hour A Survey for Thermal CH3 OH 6.7 GHz Emission toward Massive Star Forming Regions ABSTRACT: Massive stars form in dense molecular cores where the intense radiation field from young ...

... Archives . ... Especially, compressed sensing and single pixel cameras drags my attention more because the topic stimulates thoughts of astronomers in virtual observatory [ 1 ] and image processing [ 2 ] (it is not an exaggeration that observational astronomy starts with taking pictures in a broad sense) and statisticians in multidimensional applications, not to mention engineers in signal and image processing. ... Category: Algorithms , Cross-Cultural , Data Processing , Imaging | ... Chandra Blog ...