MAX MILLENNIUM COORDINATED OBSERVING PLAN 009
Goals | Ground Based Observatories |
Space Based Observatories | Target | Scheduling
SOHO JOINT OBSERVING PLAN 136
||DEFAULT RHESSI COLLABORATION
Richard Canfield (email@example.com)
Montana State University,
Dominic Zarro (firstname.lastname@example.org)
Emergent Information Technologies Inc., GSFC
||Version 4: 18 December 2000
||This is the default program for context and flare observations from
ground-based and space-based instruments and observatories in collaboration
with RHESSI. It describes the observing programs
to be used when RHESSI support observations are performed and
no other campaigns or target-of-opportunity programs are in effect.
Goal: To obtain multi-wavelength imaging and spectroscopic observations
before, during and after many solar flares over a wide range of temperatures
and heights in the solar atmosphere, for the purpose of determining the
thermodynamic and magnetic context of particle acceleration in those
solar flares observed by RHESSI ;
Approach: In a manner appropriate to each instrument, observatory,
and spacecraft, to survey all active regions likely to flare while concentrating
high temporal and spatial resolution observations by instruments with a
limited spatial field of view on a single active region identified each
day in the Max Millennium Message
of the Day;
The scientific goal of this program is that of RHESSI: to understand impulsive
energy release, particle acceleration, and particle and energy transport.
Key questions are:
Co-temporal data from ground and space-based observatories are crucial
to answering these questions.
What role do high energy particles play in the energy release process?
Do the high energy particles carry a significant fraction of the released
What mechanisms accelerate both electrons and ions to high energies so
rapidly and efficiently?
What is the environment in which this energy release occurs?
What mechanisms transport the flare energy, the energetic particle component
in particular, away from the energy release site?
What are the characteristic radiation signatures of flares that have potentially
hazardous effects, and how do these flares occur and evolve?
What is the relationship between flares and CMEs?
This plan may be used for either a scheduled campaign or a target of opporunity.
In either event, the target chosen for this observing plan will be the
active region most likely to produce energetic hard X-ray and gamma-ray flares.
Both impulsive flares and gradual flares are
interesting, although the latter are of particular importance
because they are associated with CMEs.
Both limb flares and disk flares are interesting.
Events near, or over, the limb offer unique opportunities to get
altitude information. Over-the-limb events have the bright footpoint emission
occulted so that the coronal X-ray emission can be studied more easily.
On the other hand,
events well on the disk (say within 60 degrees of the central meridian)
offer the opportunity for getting reliable vector magnetic fields.
Since this is the default observing plan, it is a compromise among various
factors: probability of flares of various GOES levels and types,
location of the AR on the disk or limb, history of past observations.
Target selection will be announced by MMmotd e-mail daily,
or more often if necessary, by the
Max Millennium Chief Observer .
This plan is intended to be used on both a target-of-opportunity basis
or on a scheduled basis, as appropriate.