Subject: Re: HIGH CADENCE IMAGING CAMPAIGN Date: Fri, 19 Apr 2002 14:03:00 +0530 From: Ashok Ambastha Organization: Udaipur Solar Observatory, Physical Research Laboratory To: Richard Canfield CC: mmscience@mithra.physics.montana.edu, pvk@prl.ernet.in Dear Dr. Canfield: We at USO will be glad to participate in the RHESSI High Cadence Imaging Campaign. We can take images at a burst mode with the cadence of 3 seconds, and faster if a smaller portion of our full frame size is selected corresponding to active region of interest. The details are as follows: 1. Field-of-view: 6x4.5 arc-minutes 2. Spectral bandpass: H-alpha (0.5 A passband) 3. UT time range: 04:00-12:00 UT, Seasons: January-June(First half), September(second half)-December (July-August are Peak monsoon in India). 4. We can participate in the campaign at short notice. With best regards, Ashok Ambastha Richard Canfield 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) > > 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). > > 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). > > 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). > > 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.) > > 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 > ====================================================================== -- Dr. Ashok Ambastha | Phone: +91-294 560626 (O) Udaipur Solar Observatory | -294 450286 (H) Physical Research Laboratory | Fax: +91-294 526325 P.O. Box 198, Udaipur-313001 (India) | Email: ambastha@prl.ernet.in Subject: Re: HIGH CADENCE IMAGING CAMPAIGN: suggested dates Date: Tue, 30 Apr 2002 13:35:20 +0530 From: Ashok Ambastha Organization: Udaipur Solar Observatory, Physical Research Laboratory To: Richard Canfield CC: mmscience@mithra.physics.montana.edu Dear Dr. Canefield: We at Udaipur Solar Observatory will be able to participate in the first campaign, i.e. May 20-June 2, 2002 period. The first half of August is usually overcast, being the peak monsoon period in India, so we will be unable to observe in the second campaign. With regards, Ashok Ambastha Richard Canfield wrote: > > Many thanks to all the observatories who responded to the RHESSI team's > appeal for collaborators at ground-based and space-based observatories > to participate in a High Cadence Imaging Campaign: > Arcetri/NSO-SPO (multiband Fe, Na, Ca imaging) > Big Bear Solar Observatory (H-alpha imaging) > CDS/SOHO (EUV spectroscopy) > EIT/SOHO (EUV imaging) > * GONG (magnetograms) > GRMT/Pune (610 MHz imaging) > Hida/Kwasan (H-alpha, G-band imaging) > * HXRS (full disk X-ray) > IRSOL/Locarno (H-alpha imaging) > Kanzelhoehe Solar Observatory (H-alpha, Na D imaging, polarimetry) > * Nancay Radioheliograph (450 - 150 MHz imaging) > * Nobeyama Radio Observatory (17 & 34 GHz imaging) > * Ondrejov SRA (GHz full disk) > Ondrejov MFS (H-alpha imaging, multi-band spectroscopy, polarimetry) > * Mitaka Solar Flare Telescope (H-alpha) > SOLIS (10830 imaging) > Udaipur Solar Observatory (H-alpha imaging) > > Those observatories marked with * observe whenever possible at the > present time, so they need no special campaign dates. > > For most participants who do not presently observe whenever possible, > the best times for a scheduled (fixed dates) high cadence imaging > campaign appear to be (first campaign) during the upcoming MEDOC > campaign, May 20 - June 2, and (second campaign) during the first half > of August. Within these time periods, we will start high cadence > observations only if the MM_COs decide the probability of flares is high > enough. If you intend to join either of campaigns, please confirm this > by an e-mail to me. If you cannot join either of these campaigns, > please tell me when you will observe (I already know about GMRT (May 12, > 13). > -- > 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 > ====================================================================== -- Dr. Ashok Ambastha | Phone: +91-294 560626 (O) Udaipur Solar Observatory | -294 450286 (H) Physical Research Laboratory | Fax: +91-294 526325 P.O. Box 198, Udaipur-313001 (India) | Email: ambastha@prl.ernet.in