Leon, Ed, Mark:
I've refined my calculations (but am still working from� interpolations on
a paper plot).
Omega Sco enters extreme NE corner of FOV at ~02:15 UT on November 25
Omega Sco passes behind the sun at position angle 21.3 degrees (about
�� � eleven o'clock) at ~5:50 UT
Omega Sco reappears at PA -40.6 (about one thirty o'clock) at� ~13:00 UT
Omega Sco leaves the FOV at ~15:00, at which time it is about 0.75
�� � solar radii (Ro) above Sun center.
Assumption: FOV is 32 arcmin square
John Raymond says that Omega Sco is likely to have a soft x-ray� spectrum.
He and I don't know our way around the ROSAT catalog: he suggests that
we ask Steve Saar for an opinion.
Omega Sco moves one solar diameter in ~12.75 hours: 2.5 arcsec/sec.
I don't know how big EIS's "slots" are, but I were EIS, I'd position a
slot about 0.1 Ro above the limb for 2 one-hour periods:
� 04:30 - 05:30 UT 0.6 Ro to east, 0.9 Ro to north
� 13:30 - 14:20 UT 0.8 Ro to west, 0.75 Ro to north
and let the star drift across the slit.
If this doesn't work, we should remember 38 Aqr (~Feb 20) and rho Leo
(~30 Aug).� These are O or B; I don't know whether the have a soft X-
ray spectrum.
And there are some cooler stars suggested by John.� I'll talk to� Steve.
Peter
--�
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� � � � � Peter L. Smith - Harvard-Smithsonian Center for Astrophysics
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