Alex Pevtsov Separators Campaign

	October 1 to 12, 1997

SCIENTIFIC BACKGROUND

 I will observe at Sac Peak on Oct. 1-12. The general idea is to
study temporal evolution of the photospheric magnetic field, use
these observations as an input for the Dana Longcope separator model,
and compare computed parameters (energy output, places of the energy 
deposit) with what we see in the corona. I plan to observe an active
region within +/- 40 degrees from the central meridian making one/two
magnetograms per hour. Since we want to cover all magnetic flux of the
region I will observe either small active region or make mosaic of a
large one. In case, if there is no well developed active region, I 
will try to observe any weak bipolar-like magnetic field associated
with the coronal loops arcade as seen by Yohkoh.

Apart from other things  we also want to see if the separator model
predicts such things as microflares, coronal brightenings, so it's why
we plan to make one/two magnetogram every hour. 

DAILY TARGETS

                          1997-Oct-01
Greetings!

The ASP observing run at Sac Peak looking for seperator geometry
during active region evolution is proceeding.  The weather at Sac Peak
today is not good, so observing will begin tomorrow (Thursday).  The
target for Thursday and Friday will be the active region now coming
around the South East limb (S27E59 at 17:00UT on 97-oct-01).  We plan
to set the target for the weekend operations tomorrow afternoon.

The ASP field of view is 85"x120" with a temporal cadence of 15
minutes.  If the active region is too large, the ASP will do a mosaic
to cover the AR.  The ASP observing hours are 1500 UT to 2200 UT,
weather permitting.

                          1997-Oct-02
Greetings!

The ASP observing run at Sac Peak looking for separator geometry during active
region evolution is proceeding.  The weather at Sac Peak is somewhat
better today, so observing has commenced on AR8090.  The target for Friday,
Saturday, Sunday and Monday will be the active region now coming around the
North East limb (AR8091). 


                          1997-Oct-06
Greetings!

The ASP observing run at Sac Peak looking for separator geometry during active
region evolution is proceeding.  The weather at Sac Peak is clear today, and
Alex is observing the central portion of AR8091 at N23 E10 (16:00 UT).  AR8091
will remain the target for Tuesday.  The AR is somewhat spread out so larger
fields-of-view may be required to cover the AR.

                          1997-Oct-07

Greetings!

The ASP observing run at Sac Peak looking for separator geometry during active
region evolution is proceeding.  The weather at Sac Peak is cloudy today, so
there will be no observations.  Hopefully, MDI and IVM can fill the gap.
Tomorrow we will continue observing AR8091 since it is still the closest
region to central meridian.


                          1997-Oct-08

Greetings!

The ASP observing run at Sac Peak looking for separator geometry during active
region evolution is proceeding.  Unfortunately, the weather at Sac Peak is
cloudy again today, so there will be no ASP observations.  Hopefully, MDI and
IVM can fill the gap in the magnetic observations.  Tomorrow (Thursday) we
will continue observing AR8091 as it has brightened in X-rays and is still the
closest region to central meridian.  Also, tomorrow we will set the observing
plan for the weekend (Friday through Sunday).  Sunday will be the last day of
the campaign.

                          1997-Oct-09

Greetings!

The ASP observing run at Sac Peak looking for separator geometry during active
region evolution is proceeding.  The weather at Sac Peak is good today and ASP
observations are underway.  Alex observed AR8091 this morning but will switch
to AR8092 this afternoon since AR8091 has faded.  Tomorrow (Friday) and over
the weekend (Saturday and Sunday) we will observe AR8092.  Sunday will be the
last day of the campaign so this will likely be the final target selection
message.

     Last modified: Fri Oct 10 16:19:24 HST 1997