* Telemetry Keyhole (SOHO will stay in TM Submode 5 during the Keyhole): 2005/06/05 - 2005/06/25: 26 m 2005/06/09 - 2005/06/20: 34 m * 2005/05/06 - 2005/06/24: EIT Bakeout (==> No EIT CME Watch). * 2005/05/05: End of MEDOC Campaign. * Mercury exited the C2 FOV on 2005/06/04 @ ~ 16:32 UT (to the left). * Mercury entered the C2 FOV on 2005/06/02 @ 00:32 UT (from the right). * 2005/05/30 - 2005/06/03 between 06:00 - 09:00 UT: C2 Plumes Study: "Microflares, Jets and Macrospicules in and Around PCH". During this time: C2 orange/clear subfield images at a 5 min cadence. FOV 14x16 LOCS block region over the South Pole. --> No LASCO CME watch during the time of the run. * 2005/05/28 - 2005/06/05: LASCO Extra PBs for 3D CME Study. During this time (for the CME watch): - only 1 C2 Orange/Clear per hour; - only 1 C3 Clear/Clear per hour; and - No EIT CME Watch (only synoptic: 4 EIT 195 per day). * Medoc Campaign started on May 16. Since then SOHO is in Telemetry submode 5.
W Limb Since late on previous day, slow development of a system of faint loops. 01:32 UT ES East Very elongated loop-like front. It fades throughout C3. 04:32 UT ES East Diffuse loop-like brightening (some signatures already in previous frame, by 03:32 UT). Inpection of the C2 Orange/-60 deg sequence shows the diffuse front first appearing at 04:09 UT, followed by a brighter ragged loop front at 05:09 UT (though by 04:49 UT some brightening can already be seen). In this sequence, this loop front appears much brighter above the E limb. Signatures of the event are gone after the data gap. GOES reported on NOAA AR 10772 the following events: - a C3.1 X-ray flare (S17E21) between 01:53 - 02:38 UT with peak emission at 02:24 UT, and - an M1.3 X-ray flare (S17E22) between 04:03 - 04:16 UT with peak emission at 04:11 UT. 06:00 - 09:00 UT C2 Plumes study. NO LASCO CME watch images. (see on top "Points of Interest"). 10:49 UT EN East (Time of C2 Orange/-60 deg): Faint and diffuse ragged loop front. The front is completely surpassed by a very bright and big loop front by 12:49 UT (time at which this big loop front is first seen, its LE being already at the end of the C2 FOV). See next event for details. 13:32 UT E Limb Bright and wide ragged loop front on the E Limb, already past the end of the FOV. Extra polarization brightness images (for a 3D CME study under way) were being taken during the time of the event. Therefore, according to the different C2 sets, the time of first appearance is as follows (Filter/Polarizer): - C2 Orange/+60 deg: 12:45 UT. - C2 Orange/0 deg: 12:47 UT. - C2 Orange/-60 deg: 12:49 UT. - C2 Orange/Clear: 13:32 UT. Faint extensions above the N and S Pole can be seen by the time, which seem to surround the C2 occulting disk by 15:32 UT -barely above the W Limb- (C2 image at 12:32 UT non-existent). As for C3, the time of first appearance is as follows: - C3 Clear/Clear: 12:38 UT. The faint extensions seem to surround the C3 occulting disk by 13:38 UT. - C3 Orange/-60 deg: 12:54 UT. - C3 Orange/+60 deg: 12:56 UT. The mean plane-of-sky speed of the LE of the event was ~ 1660 km/sec at PA 72 (as measured on C3 Clear/Clear data, only 3 frames - in the 4th frame the LE is out of the C3 FOV- ). GOES reported high activity on NOAA AR 10772 during the present and past 2 days (including an impulsive M1.3 X-ray flare at S17E22 that peaked on 06/03 at 04:11 UT). However, the most likely X-ray event associated to the event observed by LASCO was apparently not related to that AR but to an M1.0 X-ray flare that occurred on N15E90 between 11:51 - 12:45 UT with peak emission at 12:26 UT. The event has therefore been determined as a very asymmetric (and extremely faint) Full Halo Event, most likely associated with an energetic E limb event (M-class X-ray flare). Please note that it is the associated shock the one which gives the appearance of a full halo to the event and hence the one that could have a component extending toward Earth. 19:32 UT EN East Ragged front in the aftermath of previous event. Gusty outflow into next day.
NOTE: Multiple C-class X-ray flares on NOAA AR 10722 during the day (peaks at 00:39 -S17E08-, 00:55 -S18E08-, 01:50 -S18E07-, 06:43 -S18E05-, 08:48 -S18E04-, 11:40 -S18E02-, and 16:56 UT -S17W01-). 01:32 UT S Pole Ragged front developing slightly toward ESE. Some faint ragged extension by 02:32 UT on SE. It fades throughout C3. Gusty outflow afterward all along the day (rotating toward WSW as it develops). 10:32 UT EN East Loop front that fades throughout C2. 14:32 UT W Limb Bright ragged loop front. A couple of faint and expanding loop fronts follow by 17:32 and 21:32 UT. They all fade throughout C3. Gusty outflow in the form of faint expanding loop-like fronts well into next day. 20:32 UT E Limb Jet-like front.
00:32 UT ES East Bright and asymmetric loop front already past the end of the C2 FOV. It fades throughout C3. 01:32 UT EN East Faint and diffuse (and slightly asymmetric) loop front. 06:32 UT E Limb Bright thin fan-like front (fast) developing slightly toward ENE. It fades close to the inner edge of C3. 12:32 UT E Limb Another fast front (little bit bigger that the previous one at 06:32 UT) developing slightly toward ENE. It also fades close to the inner edge of C3. 14:32 UT ES East Bright loop front. GOES reported a C3.5 X-ray flare on NOAA AR 10776 (S08E80) between 13:04 - 14:08 UT with peak emission at 13:50 UT. 17:32 UT S West Initially bright elongated loop front. Very faint in C3. It fades cloe to the inner edge.
05:06 UT E Limb Bright loop front. 05:50 - 12:50 UT Temporary Data Gap. Time of the last C2 image analyzed: 14:06 UT.