Subject: Re: HIGH CADENCE IMAGING CAMPAIGN Date: Thu, 11 Apr 2002 15:38:04 +0200 From: vilmer To: Richard Canfield Dear Richard, I send you this reply concerning the Nançay Radioheliograph observations but I think that the instrument is already in the program All the best, Nicole Vilmer At 22:56 10/04/02 -0600, you wrote: >The RHESSI team seeks collaborators at ground-based and space-based >observatories to participate in a High Cadence Imaging Campaign. RHESSI >is capable of making high-quality hard and soft X-ray movies with a >cadence of 2 seconds (half spin) and even down to 10s of ms for intense >events, and seeks collaborators at observatories working in other >spectral bands (H-alpha, radio, EUV, continuum, ...) who can make >observations at similar cadence. > >Please contact me by telephone or e-mail to discuss imaging observations >you can achieve with a temporal cadence of at least 2-4 seconds: > >1. What field of view can you observe at this cadence? (RHESSI sees the >full Sun, but we presume that observations will be aimed at a specific >active region chosen by the Max Millennium Chief Observer) FULL SUN >2. What spectral bandpass(es) can you observe? (RHESSI's bandpass is >limited by both detector response and source strength but usually covers >from 3 keV to 17 MeV. Thus, it is interesting to make observations over >a broad range of flare sizes from small soft X-ray B and C flares to M >and X gamma-ray flares). Images at 5 frequencies between 450 and 150 MHz >3. In what UT time range and seasons can you observe? (RHESSI >observations are continuous, interrupted only by night in Low-Earth >Orbit and SAA). 8-15 UT everyday >4. Can you participate in a Target-of-Opportunity campaign at very short >notice, or must we pick a fixed schedule? (RHESSI would welcome >collaborators in either campaign mode, since both have unique advantaqes >and disadvantages). YES >5. If we must pick a fixed schedule, how far in advance must fixed dates >be chosen (RHESSI requires no advanced notice since it is expected to be >continuously operating in the same near-autonomous mode.) A few days >Of course, we are interested in non-imaging data at high cadence and >lower-cadence imaging data as well, but in response to this message I >would most urgently like to hear about the high-cadence imaging >discussed above. > >I look forward to hearing from you. > >Dick > >Department of Physics E-mail: canfield@physics.montana.edu >Montana State University Telephone: (406) 994-5581 >P.O. Box 173840 Fax: (406) 994-4452 >Bozeman, MT 59717-3840 USA http://solar.physics.montana.edu/canfield >====================================================================== >FedEx etc: Physics Dept, EPS 264, Montana State Univ, Bozeman MT 59717 >======================================================================