... Molecular clouds are enmeshed in webs of diffuse atomic gas that contain important information about their formation and interaction with their environment, not least because the atomic gas can trace lower column densities that are unshielded from UV radiation. ... The GALFA H I sky survey of Galactic 21cm-line emission with the Arecibo L-band Feed Array has recently mapped the MBM 53-55 region with a 3.5-arcminute beam and 0.2 km/s channels. ... Other GALFA publications ...

This paper analyzes the performance of two set theoretic-based iterative image restoration algorithms for Hubble Space Telescope (HST) degraded images. The iterative adaptive constrained least squares and frequency adaptive constrained least squares algorithms are optimized here for HST data, and applied to several simulated and real degraded HST images. ...

... TBB: retain a few seconds of raw data Off-line follow-up Coherent dedisperse The Matched Filter Optimal detector for a known signal in known Gaussian noise Matches expected signal shape (template, h) to data (s), and sums Pros: optimal for a given Gaussian dataset Cons: requires full signal knowledge , not blind to signal shape Performance : signal -to-noise ratios Template matched to ...

Help NASA Classify Martian Craters . ... Credit Copyright: Sonie Lau , NASA Ames Explanation: The large Martian crater above just left of center: is this a fresh crater, a degraded crater, or a ghost crater? ... Additionally, there are so many craters on Mars that NASA just doesn't have enough people to classify them all! ... Degraded craters are typically older and have their rims more rounded, while "ghost craters" are the oldest of all and only faintly discernable. ... NASA Official: Jay Norris. ...

... 2001 January 8 . Help NASA Classify Martian Craters . Credit: Sonie Lau , NASA Ames . Explanation: The large Martian crater above just left of center: is this a fresh crater, a degraded crater, or a ghost crater? ... Additionally, there are so many craters on Mars that NASA just doesn't have enough people to classify them all! Therefore, you can help humanity's understanding of the surface of Mars by volunteering to classify craters . ... About APOD | ... NASA Technical Rep.: ...

AN ORIGIN FOR THE SOUTH POLE-AITKEN BASIN THORIUM. ... Moscow University. ... Introduction: The lunar South Pole-Aitken (SPA) impact basin is one of the largest and oldest impact basins and has thus been heavily degraded by postbasin-formation primary impacts and their ejecta [1]. ... The SPA basin thorium map: The using data Lunar Prospector [4] the thorium distribution map demonstrated a hemisphere of the Moon which contains the SPA basin structure and its environs was constructed. ...

. This set of images from the radar instrument on NASA's Cassini spacecraft shows a relatively "fresh" crater called Sinlap (left) and an extremely degraded crater called Soi (right). Sinlap has a depth-to-diameter ratio close to what we see on Jupiter's moon Ganymede. Soi has a shallow depth compared to similar craters on Ganymede. These craters are both about 50 miles (80 kilometers) in diameter. // Credit: NASA/JPL-Caltech/ASI/GSFC

... Contamination on optical surfaces degrades the throughput of an optical system. ... Contamination is particularly pernicious on the unprotected aluminum that is commonly used on the large first-surface mirrors of reflecting telescopes. ... During that period, the covers of their protective cases is opened whenever the 3.5-m telescope primary mirror cover is opened for nighttime observing. ... CO2 clean exposed mirrors in SS case. ... Light scattering measurements performed on cleaned mirrors. ...

Tired light models invoke a gradual energy loss by photons as they travel through the cosmos to produce the redshift-distance law. ... The tired light model can not produce a blackbody spectrum for the Cosmic Microwave Background without some incredible coincidences. ... So the CMB must have come from a far away part of the Universe, and its photons will thus lose energy by the tired light effect. ... Assume that the CMB starts out as a T = (1+z)*T_o = 2.998 K blackbody, which is the blue curve. ...

... FOR EACH pair of spectrum and response: FOR EACH spectrum channel: IF ( acceptable QUALITY ) time = EXPOSURE * AREASCAL rate = COUNTS / time err2 = (HDUCLAS2 == NET) ? ... 0 ) FLUX = rate / area ERROR = sqrt(err2) / area ELSE FLUX = ERROR = NaN . ...

... As part of our effort to enhance the calibration of STIS (a spectrograph on-board the Hubble Space Telescope), we have developed a model of the readout process for CCD detectors suffering from degraded charge transfer efficiency. ... Nevertheless the empirical corrections for STIS provide an ideal means of testing and calibrating the physical model, as the empirical corrections are essentially a distillation of what is to be learnt from the calibration data with respect to CTI. ...

Response of the 2 Pass Filter with integer tap weights G. Comoretto Novemb er 12, 2003 Abstract Effects of truncation on tap coefficients for the 2 Pass Filter proposed for ALMA are examined. It is shown that performances well within specifications can be achieved using 8 bit taps for the first step filter, and 9 bits for the second. ... Different colors refer to quantization in second stage filter taps (first stage taps always 8 bit). red 8 bit, green 9 bit, blue 10 bit, black full precision. ...

... Steven L. Smith . NASA International Space Station Program Liaison to the European Space Agency . ... SPECIAL HONORS: NASA Distinguished Service Medals (two), NASA Outstanding Leadership Medal, NASA Space Flight Medal, NASA Exceptional Service Medal, IBM Outstanding Technical Achievement Award and IBM Outstanding Community Service Award. ... NASA EXPERIENCE: Smith is a veteran of four space flights covering 16 million miles and seven space walks totaling 49 hours and 25 minutes. ... DECEMBER 2013 ...

... Научная панорама ? arxiv:0710.3165 Черная дыра с массой 15.65 солнечных . ... arxiv:0710.3165 Черная дыра с массой 15.65 солнечных в затменной двойной системе в близкой спиральной галактике М33 (A 15.65 solar mass black hole in an eclipsing binary in the nearby spiral galaxy Messier 33) . ... Авторы сообщают о том, что оценка массы черной дыры в одной из внегалактических тесных двойных систем оказалось довольно высокой - около 16 масс Солнца. ...

ST-ECF Instrument Science Report ACS 2001-002 The Effective Spectral Resolution of the WFC and HRC Grism A. Pasquali, N. Pirzkal, J.R. Walsh, R.N. Hook, W. Freudling, R. Albrecht, R.A.E. Fosbury March 7, 2001 ABSTRACT We present SLIM simulations of the size and orientation with respect to by which the object extension along resolution of the grism. ... In the case of ACS, the nominal spectral resolution is 40 е/pix and 29 е/pix in the first order spectra of the WFC and HRC grism, respectively. ...

... Tabs . ... 90% -contents change but tab appearance is constant . ... HTML for the tabs div, tabs, and contents (see HTML tab) . ... div id="tabs"> <span id="tab1" class="tab tabActive" >Overview</span> <span id="tab2" class="tab" >The CSS</span> <span id="tab3" class="tab" >Event Object</span> </div> . div id="tabs"> <img id="tab1" class="tab tabActive" src="img/discography.gif" hoversrc="img/discographyo.gif" activesrc="img/discographya.gif" width="135" height="28" alt="discography" /> </div> . ...

... Parameters . Filters . ... Direct images . ... The SCORPIO-2 project: . Spectral Camera with Optical Reducer for Photometric and Interferometric Observations - 2 . The broad-band glass filters made in SAO RAS are used for the observation in the Johnson-Cousins (UBVRI) photometric system in the direct images mode. The glass filters transmission curves are shown by solid line. ... The filters transmission curves of the `comets' filters measured with the SCORPIO-2 in the F/4 beam. ...

Электронная библиотека астронома-любителя. ... библиотека . архив RSN . ... Ru.Space.News: . Март 1998 . ... Дата: 26 марта 1998 (1998-03-26) От: Alexander Bondugin Тема: STARDUST Update - March 20, 1998 Привет всем! ... TELEPHONE (818) 354-5011 http://www.jpl.nasa.gov Galileo Europa Mission Status March 25, 1998 NASA's Galileo spacecraft is sending to Earth the final pictures and science information stored on its onboard tape recorder during the December 1997 flyby of Jupiter's moon Europa. ...

... Files in red?history) . ... Belts . ... 12a. Inner Belt . ... The artificial radiation belts from the Argus experiment were located in the "slot" between the two belts and their lifetimes of a few weeks underscored the temporary nature of trapping there (especially for electrons produced just above the atmosphere). ... Like surfers riding a wave, trapped electrons and ions rode this shock and within a minute or so created a new radiation belt just outside the inner belt (picture below). ...

... Science . ... Science Users Information > Science Publications > Science Announcements . ... Observing with ESO Telescopes . ... Phase 1 Proposals . ... Data Handling and Products . ... Science Data Products Forum . ... Science Announcements . ... Published: 19 Dec 2014 . ... The allocation of ESO telescope time for Period 95 is expected to be emailed on 22 December 2014. ... The ESO GOODS advanced data products are now available via the Science Data Product query forms of the ESO Archive Facility ....