... A bad cable was found in wapp 4 brd 1 channel B on 07mar07. ... The 7B data did not have any jumps since the data did not go through the bad cable. You can replace the 6B data with the data found in 7B. For single pixel observers, wapp 4 polB will be jump around. ... It got worse during feb07. ... Looking at the a2010 alfalfa total power ratio PolA/polB (check out the feb07 .pdf file in the column Strips: badRatios rms A/B) . ... The ratio started to jump around at the start of feb07. ...

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

... 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 ....

... Artist?s conception of the collision of Comet Shoemaker-Levy 9 with Jupiter, as seen from the Galileo spacecraft. At the time of the first impact, the comet fragments will be much farther apart than shown in this illustration. ... One orbit, computer May 18, 1993 by Syuichi Nakano, showed that the comet passed close to Jupiter in July 1992, and would pass within 45,000 kilometers of the center of Jupiter in July, 1994. ... The fragments of Shoemaker-Levy 9 move around Jupiter. ...

The large magnetic cloud caused by coronal mass ejection at the Sun on January 6, 1997 came to the Earth at early morning on January 10 and continue to interact with Earth's magnetosphere till January 11 (see for example home page of this event prepeared by Dr. M.Peredo http://www-istp.gsfc.nasa.gov/istp/cloud_jan97/event.html ). ... During the days discussed here INTERBALL-1 satellite was in the magnetosphere (MS) near its dusk flunk - see the Fig. 1 for compearing. ...

Next: Phase Dispersion Minimization Up: Period Analysis Previous: Period Analysis . Period determination for short period stars is performed by observing target fields several times per night for several consecutive, or closely spaced, nights. ... First the individual frames are debiased and flat--fielded, then fluxes within a four arcsecond aperture around each star (targets and randomly chosen background stars) are extracted. ... Phase Dispersion Minimization . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Lightcurve of HW Vir from images obtained using the Faulkes Telescope South, operated by Las Cumbres Observatory . The blue triangles show the difference between two stars whose brightness is constant. ... This shows the value of the Faulkes Telescopes in the follow-up observations of eclipsing binaries with the aim to detect and characterise additional circumbinary companions. ...

ATNF ATUC Memorandum To: ATUC From: John Reynolds Date: 29 November 2004 Subject Parkes 50cm RFI Summary The Parkes 10/50cm receiver system installed in October 2003 continues to function well. The main limitation at present is Radio Frequency Interference (RFI) caused by Television transmissions in the 50cm band, both within and outside the nominal observing band (648-712MHz). The RFI, if unmitigated, threatens to make useful observing in this band very difficult. ...

... Tonight's Sky . ... Observing . ... Star Atlas . ... stars . ... Astronomy for Kids . ... Picture of the Day . ... Observing springtime deep-sky objects with a large telescope . ... What causes spikes around stars in pictures, and how can I prevent them? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... Calibration and analysis of this observation posed very interesting challenges for the authors, in particular dealing with an exciting new instrument whose on-orbit calibration was not yet well defined. ... Five mosaic positions were observed during five consecutive orbits as well as observations for dark and flat calibration. ... Darks and flats had to be created from contemporaneous reference observations and problems within the calibration process had to be resolved. ...

Educator's Guide to Sunspots . ... Naked eye observations of the Sun will result in blindness. The improper use of telescopes or binoculars will cause blindness much faster. ... Binoculars, with the front of one ocular covered, can be used to project a sharp image of the Sun on to a white piece of paper. ... Aim the binoculars by tilting them up and down and back and forth until the Sun shines through. ... Sharpen the image of the Sun on the paper by using the binocular's focusing knob or lever. ...