SUMER study #490: Slow active region scan (incl. flare)
- date, time: 10.Jul.96, 01:04 - 04:25 UT
- field of view: 556 - 624 arcsec W, 260 - 140 arcsec S
- slit: 0.3 arcsec x 120 arcsec, top (number 6)
- raster step size: 1.13 arcsec (3 elementary steps)
- exposure time: 200 seconds
- telemetry: 61 images of 1024 spectral x 120 spatial pixels (format 4)
- compression: quasilog-min-max (method 5)
- wavelength: 1445.78 Å on reference pixel 399 of Detector A
- rotation compensation: after complete scan, corresponding to 0.75 arcsec
after 367.914 seconds.
- binning: no spectral, no spatial
- on-board flat field correction: yes
Remarks: The study was initiated by J. G. Doyle (Armagh Obs.). It was
intended as Si VIII density diagnostics in an active region. During the
observation (after 03:18 UT), a flare occurred.
Due to solar rotation, the real east-west field of view is only a 44-arcsec
subset of the nominal field of view stated above. Due to the slit image on the
detector, the transmitted north-south field of view is only a 105-arcsec
subset of the nominal field of view stated above.
The Fe XX line shift is calibrated under the assumption that the resting
position of this line is situated 27 spectral pixels (or 1.15 Å) blue
relative to the S I 1444 line.
Details will be published by J. Khan et al.
Complete spectral window
SUMER field of view in EIT images
taken approx. 23:00 UT the day before
line = *, continuum = +
Fe XX 1443.1/2 (8 000 000 K)
continuum and line intensity, line shift and width
line = *, continuum = +
Si VIII 1445.76 (850 000 K)
continuum and line intensity, line shift and width
line = *, continuum = +
C I 1432 (10 000 K)
continuum and line intensity, line shift and width
line = *, continuum = +
S I 1444.25 (10 000 K)
continuum and line intensity, line shift and width
Cont., S I, C I, Si VIII, Fe XX
IED, 17.Oct.00