* 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 * During the KEYHOLE, LASCO will be in synoptic program at the usual cadences, with little loss of telemetry throughout due to the advanced recorder setup. * 2005/05/06 - 2005/06/24: EIT Bakeout (==> No EIT CME Watch). EIT performed the long pre-bake calset (06/06 15:58-21:45 UT) and went to heaters on at 21:52 UT. EIT will be in bake till June 24 @ 10:00 UT and should resume imaging by (06/24) 20:00 UT.
02:00 UT N East Very faint elongated front that fades throughout C2. 05:12 UT W Limb Extremely faint and diffuse brightening. It develops (Partial Halo) as an asymmetric and expanding loop front, extending all above the SW limb, up to past the S Pole. The most western part of the LE reaches the end of the C2 FOV by 13:12 UT. By that time, the part of the LE above the S Pole is only midway to the end of the FOV. The event is first seen in C3 at 11:18 UT just appearing above the W Limb. The angular span of the event at 17:42 UT is ~ 190 deg (from PA 130 - 320), and still expanding. The mean plane-of-sky speed of the LE at PA 285 was ~ 166 km/sec (based on C2 and C3 data). The HT diagram shows an accelerated profile (speed < 100 km/sec at the beginning of the C2 FOV, almost 300 km/sec at ~ 12 solar radii). There are no EIT images available (EIT CCD bakeout under way: 2005/06/06 21:52 - 2005/06/24 20:00 UT). GOES reported several B- and C-class X-ray flares during the day, all from NOAA AR 10776 (in average at around S06E40). The projection of the event in the plane-of-sky as observed in the LASCO FOVs makes it unlikely a direct association of the event with the X-ray activity reported. On the other hand, images of the GOES Solar X-ray Imager (SXI) show a small and quick brightening to the East of NOAA AR 10772, starting at 01:41 UT and peaking at 01:45 UT. The BBSO H alpha image taken on 2005/06/07 at 23:30 UT shows the existence of a filament to NNW of AR 10772 (centroid of the filament at around S05W52). The corresponding H alpha image taken on 2005/06/08 at 19:00 UT no longer shows that filament (unless projection effects make me misinterpret the image). In summary, the event has therefore been determined as a faint and very slow partial halo CME, apparently associated to the disappearance of a filament to NNW of AR 10772. Should that be the case, then a component of the event toward Earth would be likely. 11:00 UT EN East Faint blob-like front. Some gusty outflow, very faint.
Mostly quiet. 02:24 - 08:00 UT Temporary Data Gap. Time of the last C2 image analyzed: 14:24 UT.