ST ScI Preprint #1384 . Authors: Bradley Whitmore, Inge Heyer, Stefano Casertano Observations of Cen have been used to characterize the Charge Transfer Efficiency (CTE) of the Wide Field and Planetary Camera 2 (WFPC2) onboard the Hubble Space Telescope. ... The observations indicate that for very faint stars on a very faint background, the CTE loss from the top to the bottom of a chip has increased from about 3% shortly after the cool-down of WFPC2 (April 23, 1994) to roughly 40% in February 1999. ...

... 2012 February 29 . Moon and Planets Over Catalonia . ... Explanation: Venus and Jupiter will appear unusually close in the sky over the next month. ... In the above image composite taken late last week from Catalonia , Spain , a bright crescent moon appears to the right of Venus, while Jupiter appears near the top of the image. ... A gallery of conjunction images is visible on the Asterisk -- APOD's discussion board. ... The next Jupiter-Venus conjunction will occur in May 2013. ... About APOD | ...

... Copyrightї1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

... Moon Venus Mars Skyline . ... Taken on February 20, five different exposures made in rapid succession were used to created this tantalizing telephoto image. ... Venus, named for the Roman goddess of love, and Mars, the war god's namesake, came together by moonlight in this lovely skyview, recorded on February 20 from Charleston, South Carolina, USA, planet Earth. ... The Rosette Nebula is not the only cosmic cloud of gas and dust to evoke the imagery of flowers -- but it is the most famous. ...

... Staff list | ... The European VLBI (Very Long Baseline Interferometry) Network (EVN, http://www.evlbi.org/ ) is a network of radio telescopes in Europe, Asia, North America and South Africa, which allows imaging at radio wavelengths with millarcsecond resolution (from 0.001'' to 0.1'') using the VLBI technique. ... VLBI continuum observations generally observe high brightness temperature radio emission from synchrotron or gyro-synchrotron processes with thermal emission detectable on short baselines...

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

Next: Results and discussion Up: Observations and data reduction Previous: Reduction of photometric data . ... Since HS 0822+3542 had a known optical redshift, we split the 1024-channel autocorrelator in two halves and used a dual-polarization receiver to increase the S/N ratio. ... 0.077 0.005 . ... 0.004 0.003 . ... 0.005 0.004 . ... 0.005 0.04 . ... 0.49 0.03 . ... Next: Results and discussion Up: Observations and data reduction Previous: Reduction of photometric data Labaratory "Structure" . ...

... ESO Science Newsletter February 2016 . ... This newsletter is a summary of recent ESO Science Announcement items. ... A new Band 9 receiver was installed inside the Swedish ESO PI receiver for Apex ( SEPIA ) at APEX in early February. ... After on-sky commissioning in late March, Science Verification (SV) observations are planned. ... The Call for Proposals for SEPIA Band 9 SV can be found here and the deadline is 12:00 CET, Friday 11 March 2016 . ... Joint ESO, ALMA, NAOJ, NRAO Workshop. ...

... Home Education Classes AAA Spring Astronomy Class: The Physics of Astronomy тАУ February ? March 2016 . ... Classes . ... AAA Spring Astronomy Class: The Physics of Astronomy тАУ February - March 2016 . ... This MonthтАЩs Sky тАУ March 2016 . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... The Virtual Impactor 2011 BA12 on 2011 February 8th. Images obtained using the Faulkes Telescope North, operated by Las Cumbres Observatory. We were able to observe near earth objects (NEOs) such as asteroids and comets by controlling the Faulkes telescopes in Australia and Hawaii over the internet using the Faulkes Telescope Project website . ... Before we used one of the telescopes we had to ensure that the object was observable. ... More astronomical projects with the Faulkes Telescopes . ...

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

... 8 February , 2014 SAI seminar (Ryde et al 2010) 5 Thermal emission from GRB jet progenitor observer photon jet Photosphere (=1) · · · · Photons are not produced at the photosphere We have to calculate radiative transfer We need to know where the photons are produced We construct the expression for effective optical depth in relativistic flow considering random walk process in relativistic flow SAI seminar 6 8 ... 8 February, 2014 SAI seminar 28 ...

... APT Activities and Science Results 3. ... APT Secretary Philip Edwards (ISAS) reviewed the aims of the APT (http://www.vsop.isas.ac.jp/apt/DefinitionAndAims.html). ... The Australia Telescope Compact Array, and Ceduna, Hartebeesthoek, Kashima, Mopra, Parkes, and Shanghai telescopes of the Asia-Pacific Telescope participated in these observations. ... In the absence of Tetsuo Sasao, Philip Edwards briefly described results of the APT 22 GHz observations conducted from October 1st to 5th, 1997. ...

... Flux density at 1 GHz (/Jy): 19 . ... Notes: This is the remnant of the SN of AD 1006. ... Optical: Filaments to the NW, with broad H component. ... Point sources: The background Schweizer Middleditch star is near the middle of the remnant. ... van den Bergh 1976, ApJ, 208, L17. Optical observations. ADS . ... X-ray spectroscopy. ... Schweizer & Middleditch 1980, ApJ, 241, 1039. ... Optical spectroscopy of the Schweizer Middleditch star. ... Optical spectroscopy. ... 2013, A&A, 552, A9. ...

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . Planets . ... Monthly Sky Notes . ... February . ... The ringed planet will be quite bright, but unlike Jupiter it will not be the brightest point of light in the sky, this accolade will return to Sirius which is the brightest star in our night sky in the constellation of Canis Major. ... Seven days later on February 18, the Moon will be in its full Moon phase. ... Tweets that mention Wonders of the February Night Sky | ... Astronotes . ...

MOS monitoring Fading Cal sources MOS CTI Column Correction Mallorca EPIC Cal Meeting - February 2005 Darren Baskill: http://www.star.le.ac.uk/~dbl XMM project: http://www.src.le.ac.uk/projects/xmm/ MOS CTI Column Correction Problem spotted in 1E0102.. Mallorca EPIC Cal Meeting - February 2005 Darren Baskill: http://www.star.le.ac.uk/~dbl XMM project: http://www.src.le.ac.uk/projects/xmm/ Problem spotted in 1E0102.. ...

... R2242 Date Received: 2006-Jun-01 11:50:17 Technical Page Proposal Type: General Category : Observation Category : Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Planetary Radar Solar System 60 Hours 3.5 hours S-Band radar observations of Titan During the opposition of the Saturn system in February 2007 the sub-Earth latitude will be ~ providing the first 15S good opportunity for Arecibo 13 cm radar ...

. First Announcement . Second Announcement . The Proposed Scientific Programme . Symposium Schedule . Views of Zvenigorod . Organizing Committee . V.Stepanov . stepanov@iki.rssi.ru . Space Research Institute of RAS . 84/32 Profsoyuznaya Str . Moscow, 117810 . Russia Phone: +7 095 333 11 22 . Fax: +7 095 310 70 23 . Back to INTERBALL Homepage .