LASCO Activity Report for
September 7, 2005 SOHO Science Daily Meeting

Event times are first frame seen in C2 camera unless otherwise noted.
These are preliminary observations for the daily SOHO science discussions.
Final analysis is reported on the Lasco CME list.
An archive of these reports is available.

Points Of Interest

KEYHOLE OPERATIONS:
-------------------
SOHO keyhole #10 telemetry period: Aug 31-Sep 28, 2005.

EIT will go to CCD bakeout between Sep 2 23:00 UT - Sept 23 10:00 UT 
with its mini-cal pre and post sets as folows:
2005/09/02 19:00:00 - 2005/09/03 01:00:00
2005/09/23 20:00:00 - 2005/09/24 00:20:00

During the Telemetry Keyhole LASCO will be in improved synoptic cadence 
of C2 at 12 mins cadence and C3 at 30 mins cadence, including daily 
orange/blue filter fielding images.

The SOHO roll back to 0 deg is scheduled for Thursday Sept 8, 2005.
LASCO will safe for the S/C roll (also Station Keeping -SK- and Momentum 
Management -MM-) on Wed Sept 7 at 11:00 UT and re-open Friday Sept 9 
at 12:00 UT.

2005/09/06 (Tuesday)

03:36 UT  N West	Diffuse and very faint ragged loop front. It fades
			throughout C3.

08:12 UT  S East	Diffuse and ragged front, apparently the top of
			a diffuse twisted structure that expands toward N. 

20:00 UT  S East	Initially bright loop front develops as an asymmetric
			and expanding bright loop front mainly toward E. GOES
			recorded a long duration M1.4 X-ray flare on S12E88 
			(AR barely behind the limb) between 09/06 19:32 - 09/07 
			00:44 UT with peak emission at 22:02 UT.

21:12 UT  WN West	Gradual brightening of the cusp of the streamer 
			preceding the development of a bright loop front 
			followed by a cavity and apparently twisted inner core
			(prominence material). Typical 3-part structure CME.
			Development partly missed in following data gap.

2005/09/07 (Wednesday)

	00:48 - 04:36 UT	Temporary DSN Data Gap.

04:36 UT  W-WS West	Ragged loop fronts already under development after
			data gap.		

Time of the last C2 image analyzed: 11:00 UT.

	11:00 UT	LASCO closes doors in preparation for S/C roll, 
			MM, and SK on 2005/09/08.