Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 13 - 19.08.2012, Forecast on 20 - 27.08.2012, Carrington Rotation 2126, 2127 (18,82.07; 15,04.08.2012) SUNSPOT ACTIVITY OF THE SUN REMAINED AT THE AVERAGE LEVEL. ... NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY IS EXPECTED TO BE LOW AND AVE- RAGE. ... FLARE ACTIVITY WAS ON THE HIGHE LEVEL ON 18 AUGUST, AVERAGE LEVEL - ON 17.08, AND THE LOW IN OTHER DAYS. ... Class E(1-8A) AR RII/IV CME X / opt. ...

... Magnetic storms online . ... Geomagnetic activity forecast . ... August : 2015 . ... No magnetic storm is expected . From 7 August 2015 to 2 September 2015 the following magnetic storms and disturbances are expected: . September 01, 2015 geomagnetic storm of level G1 (minor) . ... August 10, 2015 geomagnetic storm of level G1 (minor) . August 28, 2015 geomagnetic disturbances . ... August 07, 2015 geomagnetic disturbances 7 August 2015 - 2 September 2015 . 06.08.2015 . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The peak of activity is expected to occur around midday on August 12th, with a possible all-sky maximum of perhaps 50тАУ100 meteors per hour visible during the nights of 11th/12th August either side of the shower maximum. ... Most meteors are produced by comets, which shed trails of dust while passing through the inner solar system on their elliptical orbits around the Sun. ... See also: . Videos of 2009 Perseid Meteors . ...

... 2002 August 5 . Rays from an Unexpected Aurora . ... For starters, last Friday morning, no intense auroral activity was expected at all. Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Large sunspot groups indicate that activity from the currently active Sun is relatively likely, possibly causing other streams of energetic particles to cascade onto the Earth and so causing more auroras . ... About APOD | ...

... Actual stars are expected to be more complicated than these simulations. ... The spot may be entirely visible most of the time (one would observe a prolonged flux minimum low), and then part of it may disappear over the horizon briefly and then return (slow rise and then fall back to constant level). ... With the set of observations taken here, I have information available from several comparison stars and color information. ... The period found must be consistent with the data from any given night....

Astronomy Picture of the Day . ... 6.03.2006 . ... Right now, however, a new comet has brightened unexpectedly and is visible as a faint streak to the unaided northern observer in the eastern morning sky just before sunrise. ... Comet Pojmanski , officially designated C/2006 A1 and discovered only in January, now sports a turquoise tail several times longer than the full moon. ... March 2006 . ... Publications with keywords: comet - comet tail . Publications with words: comet - comet tail . ...

Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... August . ... August, 2013 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...

... In Table 14.1 we list a provisional summary of our calibration goals for Cycle 7 and Cycle 7-NICMOS. ... The present knowledge of photometric calibration does not yet permit a definitive projection of the ultimate accuracies which may be obtainable with NICMOS. ... Perforce our existing calibration data for Camera 3 have been obtained with it out of focus and therefore the estimates for its in-focus performance remain extrapolations. ... Breathing and dewar motion are approximately equal effects. ...

... Of the 4 buttons in the bottom part of the configuration screen, three deals with power level adjustments: the 'Power control' button brings up the power control window where You can adjust the power levels of the different parts of the IF/LO system, the 'Power levels' button brings up the power level monitoring window (which also can be run outside CIMA as the 'powerwin' program), and the 'Adjust Mock power' button which adjusts the power levels on the Mock spectrometer (but nowhere else). ...

... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > I see unexpected boxy emission-like features in my REDL spectra - where do they come from? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... The pipeline by default interpolates across the bad columns in the REDL CCD when it creates the master bias, but does not so when it processes the science data. This inconsistency can create boxy emission-like features as seen in the figure below. ...

The Special Astrophysical Observatory of the Russian Academy of Sciences will organize a traditional International conference ?Physics and Evolution of Magnetic and Related stars? during the period from August 25 to August 31, 2014. ... evolution of CP and related stars, . ... interplay of pulsations and magnetism in B, A, and F stars, . ... chemical abundance patterns of CP and related stars, . magnetic white dwarfs, . ... Laboratory for the Stellar Magnetism Study of SAO of RAS . ...