SOHO entered the Telemetry keyhole on 2004/09/11. It will last until 2004/10/06. LASCO is loaded with the 2 hr cadence in C2 and C3 pB orange filter binned full field (FOV) LEB summed. This will be part of the CME Watch in LASCO pB program to run the duration of this keyhole. This kicked off 9/10 22:30 UT and continues through 10/3 12:00 UT. EIT 195 CME was interrupted on 2004/09/10 (Friday) at 20:00 UT for EIT CCD bakeout calibrations. EIT CCD bakeout between 2004/09/10 @ 22:00 UT - 2004/10/03 (Sunday) @ ~22:00 UT.
00:30 UT E Limb Faint, ragged, and not well defined front. GOES recorded a C1.0 X ray flare from NOAA AR 10672 between 21:59 - 22:26 UT with peak emission at 22:16 UT (on 2004/09/09). 08:06 UT WS West Faint (initially asymmetric) loop front. It fades throughout C3. 09:30 UT E Limb Couple of faint fronts in the gusty outflow, most likely related to activity on NOAA AR 10672. 20:34 UT E Limb Initially bright ragged front. GOES recorded a C1.7 X-ray flare from NOAA AR 10672 (N01E59) between 18:56 - 20:15 UT with peak emission at 19:41 UT. 21:49 UT W Limb Ragged loop front followed. It fades throughout C3.
03:36 UT W Limb Faint ragged loop front already under development. It fades throughout C3. 04:54 UT W Limb Small and faint ragged loop front developing slightly toward WSW. 05:12 UT E Limb Elongated and ragged faint loop front with apparently twisted trailing material. 08:12 UT W Limb Another couple of faint loop fronts becomes discernible. 11:56 - 18:15 UT Temporary Data Gap.
00:36 UT E Limb Bright loop front that develops as an off-centered halo CME. A strong cavity and inner core can be well distinguished by 01:24 UT. At that time the LE on E is already above the end of C2 FOV, and fainter loop- like extensions already cover the C2 occultor, spanning from the N to the S Pole, all above the W Limb. Much trailing material follows on E. The event is first seen on C3 at 01:18 UT above the E Limb. By 02:18 UT the C3 occultor is completely covered, the LE on the E Limb being at ~ 13 solar radii, while on W the LE is only at above 5.5 solar radii from disk center. For reference, the mean plane-of-sky speed for the LE of the outermost feature at various PA is given below (based on C3 data): PA 044 : 1150 km/sec PA 086 : 1262 km/sec PA 140 : 1326 km/sec PA 221 : 787 km/sec PA 296 : 470 km/sec GOES recorded an M4.8 X-ray flare from the NOAA AR 10672 (N03E49) between 00:04 - 01:33 UT with peak emission at 00:56 UT. Please note that SOHO entered a telemetry keyhole on 2004/09/11 that will last until 2004/10/06. Between 2004/09/10 22:00 UT - 2004/10/03 22:00 UT EIT will be performing the CCD bakeout and therefore no EIT images will be available during that period. The event has therefore been determined as an off-centered 'full' halo CME, most likely frontsided in spite of the temporal correlation observed with the X-ray event. 02:54 UT E Limb In the trailing material of previous event, a small and bright front can be discerned. It fades throughout C3. 12:12 UT WS West Very elongated loop front. 12:54 - 19:12 UT Temporary Data Gap. 19:36 UT W Limb Couple of faint loop fronts, one developing toward W (fades in C3) and the other one slightly toward WNW (fades in C2). 20:12 UT N East Faint ragged loop front that fades throughout C2. It is followed at 22:54 UT by a kind-of faint half loop front.
02:48 UT N East Ragged expanding front. 09:45 - 17:00 UT Temporary DSN Data Gap.