Solar Activity at High Resolution . ... Solar Group . ... Researchers in Arcetri are involved in studies of solar activity at high temporal and spatial resolution, especially at photospheric and chromospheric levels. Our principal aim is to study the temporal correlation between the flares at coronal levels (e.g. hard X-rays emission) and the lower atmospheric signatures, mainly during the preflare and the impulsive phase. ...

... Other Characteristics of the Sun: Variability of Rotation, Magnetism, Chemical Structure, Planetary System. ... Methods of Solar Magnetic Fields Measuring: Visual, Photografic, Photoelectric. ... Empiric Datas of Magnetic Fields in Photosphere, Chromosphere and Corona. ... Characteristics of Magnetic Field in Balanced Force Tubes by Potential and Forceless Field. ... Phenomenons in Active Region (Magnetic Field, Spots, Torches, Solar Prominences, Flares, Discharges. ... Magnetic Fields in Flares. ...

HUBBLE SPACE TELESCOPE DAILY REPORT #1471 PERIOD COVERED: 0000Z (UTC) 09/07/95 - 0000Z (UTC) 09/08/95 Daily Status Report as of 251/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed GHRS/1 5417 (A Search for the Physical Processes on Jupiter) The High Resolution Spectrograph (Side One) was used as part of a program to observe atomic hydrogen emission at different latitudes and longitudes on the planet Jupiter. A wave calibration and sky background observations were made. ...

At Arecibo we have a variety of optical instruments that we use to study terrestrial airglow emissions. ... As a complement to the airglow instrumentation we also maintain a set of optical instruments, called lidars, used for "active" remote sensing of the atmosphere. That is, we generate our own source signal using lasers and measure the characteristics of the light scattered back from the atmosphere. ... An operations manual for the Optical Laboratories is currently under major revision. ...

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2014 > High Resolution 2014 . ... Science Users Information . Observing Facilities . ... Instrumentation Development . Future Facilities and Development . ... Observing with ESO Telescopes . ... Data Handling and Products . ... ESO Data . ... Recent years have seen a huge development in high-resolution astronomical techniques, which are critical to progress in many different areas of astronomy. ...

... Astronomy . ... Requires various plug-ins to your browser to work right. [m,h] (A simpler version of this activity, to be done with printed paper versions of the image, can be found at: www.jpl.nasa.gov/galileo/sepo/educaton/europa/puzzle.html ) . ... Interesting activity, in which students use an inexpensive "stream tray" to simulate the flow of water on sandy terrain, compare their results to features seen in martian images, and then try to replicate some of the features seen on Mars. ...

Swift/ XRT radiation damage and results from the lab using a proton-damaged CCD Claudio Pagani (Swift/ XRT team) XMM Calibration Meeting, Leicester, 7/3/2012 XRT CCD e2v CCD -22 detector (developed for EPIC MOS camera on XMM) Operated in Photon Counting (PC) and Windowed Timing (WT) mode 4 55Fe corner sources continuously illuminate CCD corners, used to monitor CCD performance Spectral resolution at launch: FWHM = 135 eV at Mn K- (5.9 ...

... Let us first find out which way -- rise in spectral resolution with some loss in the S/N ratio or increase in the S/N ratio with a fixed spectral resolution -- is better for the purpose of reduction of equivalent width determination errors. ... N -- number of counts for 1 ? ... line equivalent width, . ... Thus if the spectral resolution is managed to be increased (i.e. to decrease )without loss in the number of counts falling at 1 ?, the equivalent width measurement error is then proportional to . ...