LASCO Activity Report for
December 27, 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 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.

2004/12/23 (Thursday)

	LASCO reopened doors at ~ 20:45 UT.

22:12 UT  EN East	Jet like front developing toward NE, followed by
			another one at 22:24 UT. 

2004/12/24 (Friday)

	00:00 - 05:24 UT	LASCO Data Gap.

05:24 UT  ES East	Big loop front. By 06:00 UT another loop front follows.
			Development missed in the following data gap. C3 images
			show by 16:42 UT a wide CME spanning from ENE up to the
			S Pole with its LE almost at the outer edge of the FOV.
			It is difficult to say whether this signature corresponds
			to the continuation of the events described above or
			belongs to a separate event. Note that by that time,
			C2 shows the development of faint wide loop fronts 
			developing mainly toward ENE and E (1).

05:36 UT  WN West	Big and bright loop front with bright inner core (very
			nice and clear prominence material). Development missed
			in the following data gap.

	07:36 - 16:12 UT	LASCO Data Gap.

16:12 UT  WS West	Loop front with apparently structured interior, already
			under development after data gap.

19:36 UT  N East	Ragged and not well defined faint front that quickly
			fades. Difficult to say whether it is related to (1)
    			- see end of event reported to start at 05:24 UT -.

2004/12/25 (Saturday)

	00:00 - 05:24 UT	LASCO Data Gap.

07:24 UT  E Limb	Apparently wide and ragged loop front. Development 
			missed in the following data gap.

	08:24 - 20:00 UT	LASCO Data Gap.

20:48 UT  SS East	Faint blob-like front, preceded by another one already 
			under development after data gap.

22:12 UT  NN West	Faint loop front preceded at 20:57 UT by a faint
			structure that seems to be pushed toward N. Outflow 
			discerned toward N - NNE.
	

2004/12/26 (Sunday)

00:24 UT  W Limb	Bright ragged loop front and apparently twisted 
			trailing material.

08:24 UT  ES East	Diffuse jet-like front that fades throughout C2.
			Infalling material to N, in the aftermath of previous
			event.

11:48 UT  E Limb	Thin asymmetric and diffuse loop front. It fades 
			throughout C3.

13:12 UT  WS West	Loop front that quickly fades.

17:00 UT  S East	Faint jet-like front, slightly 'curved'.

18:12 UT  S Pole	Couple of faint blob-like fronts. Smaller ones can
			also be discerned before, but it is difficult to 
			precise the time of appearance. They all fade 
			throughout C3.

19:12 UT  S East	Diffuse loop front a little bit to N of the faint jet.
			It is followed at 19:36 UT by a very faint and
			asymmetric loop front. They both fade throughout C3.

23:36 UT  E Limb	Wide and ragged loop front that fades throughout C2.

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.