LASCO Activity Report for
December 29, 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

EIT 195 CME watch at full resolution resumed on 2004/12/28 at 20:41 UT.

Telemetry Submode was changed 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. 
  CCD bakeout between 2004/12/11 (18:47 UT) - 2004/12/28 (No EIT images). 

- 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.

2004/12/28 (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. 

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, with a bright
			feature developing toward W. 

16:12 UT  S West	Another bright ragged front, brighter to S.

18:12 UT  E Limb	Diffuse loop front (1) with extensions to N and S. 
			After the following data gap, a bright and strong 
			ragged loop front (2) can be seen in C2 developing 
			with a structured (twisted) inner core. Some infalling
			material to S. By the time, GOES reported the following
			X-ray events on NOAA AR 10715:
		      - a B4.7 X-ray flare (N05E77) between 16:38 - 16:53 UT
			with peak emission at 16:45 UT,
		      - a C7.2 X-ray flare (N05E79) between 17:41 - 18:28 UT
			with peak emission at 18:01 UT [most probably associated
			to (1)], and
		      - a C1.9 X-ray flare (N05E81) between 20:25 - 20:32 UT
			with peak emission at 20:29 UT [most probably associated
			to (2)].

	19:24 - 21:04 UT	Data Gap.

21:04 UT  WS West	Another ragged loop front. Start missed in previous
			data gap.

NOTE: 	The multiple CMEs seen on WSW-SW along the day are associated with the 
      	X-ray activity, i.e. multiple C- and B- class X-ray flares, reported 
	by GOES during the day on NOAA AR 10713 - by the time at around 
	S10W70/80 - .

2004/12/29 (Wednesday)

NOTE: 	As on previous day, the multiple CMEs seen on WSW-SW along the day are
	most probably associated with the X-ray activity, i.e. multiple C- and 
	B- class X-ray flares, reported by GOES during the day on NOAA AR
	10713/10712 - by the time at around S10W90 - .

01:57 UT  N Pole	Very faint blob-like front preceded by a similar one
			(which is already close to the end of the C2 FOV). A
			couple more follow, developing toward NNW.

01:57 UT  S West	Elongated and initially bright feature. Asymmetric
			and faint loop-like structure to N.

03:21 UT  S West	Another elongated and initially bright feature that
			develops as an asymmetric loop front brighter to S.

06:21 UT  S West	Another elongated and initially bright feature that
			develops as an asymmetric loop front brighter to S.

07:45 UT  E Limb	Initially bright ragged loop front that fades when
			appearing the following event (*).

08:45 UT  E Limb	(*) Bright loop front with apparently twisted trailing
			material developing toward ESE. A very faint and 
			diffuse loop-like feature (extensions?) moving toward 
			ENE follows its development.

10:45 UT  S West	Another elongated and initially bright feature that
			develops as an asymmetric loop front (fainter than
			the previous ones).

	13:00 - 18:20 UT	Temporary DSN Data Gap.