LASCO Activity Report for
December 28, 2004 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

Telemetry Submode change to Submode 6 on 2004/12/28 (Tuesday) at 17:30 UT.

- Telemetry Keyhole # 7: 2004/12/13 - 2004/12/29 (intermittent contact).

- Spacecraft Maneuvers on 2004/12/21 (Tuesday). Therefore, LASCO was closed 
  for the S/C maneuvers (Station keeping, Momentum management, and 180 deg 
  roll) between Dec. 20 (21:00 UT) - Dec 23 (~ 20:45 UT).

- EIT pre-bake cals taken on Saturday 2004/12/11 between 15:24-18:30 UT. The 
  CCD bakeout started at 18:47 UT. The end of the bakeout will be on 2004/12/28
  at 10:00 UT. Therefore, no EIT images during that period.

- During the Keyhole, LASCO is observing with DSN gap recording availability
  thanks to the FOT and the SOCs hard work. C2 and C3 observes at a 
  standard synoptic plan of C2 at 10 minute cadence and C3 at the 30 minute
  cadence with the daily pB and flat field images.

2004/12/27 (Monday)

07:12 UT  S West	Initially bright and very narrow front immediately
			followed by a faint and diffuse ragged loop front.
			Similar couple of features follow starting at 08:36 UT.
			They all fade throughout C3.

14:24 UT  W Limb	Small front followed by ragged loop-like fronts (on 
			WSW) at 15:12, 17:48, and 21:12 UT, all of them
			developing toward WSW. After the one at 21:12, the slow
			development of a faint system of loops can be discerned
			to S (SW Limb).

23:12 UT  S West	Ragged front partly superposed in the LOS with the 
			slow development of a system of faint loops. 
	

2004/12/28 (Tuesday)

00:24 UT  S West	Ragged asymmetric loop front.

01:48 UT  S West	Another ragged asymmetric loop front.

02:48 UT  E Limb	Faint and diffuse loop front that fades throughout C3.

03:48 UT  WS West	Small ragged front.

04:36 UT  WS West	Not well defined front. This event is most probable
			associated with the B4.6 X-ray flare reported by GOES
			on NOAA AR 10712 (S11W71) between 04:17 - 04:28 UT
			with peak emission at 04:21 UT.

06:36 UT  S West	Another ragged asymmetric loop front.

09:48 UT  S West	Bright asymmetric and ragged loop front.

13:12 UT  S West	Another bright ragged loop front, partly developing
			toward W. Most of the activity on WSW - SW is most
			probably associated with the X-ray activity reported 
			by GOES on NOAA AR 10713 - by the time at around
			S10W70/75 - (several C-class X-ray flares during the 
			last hours).