We present here the light curves in the four filters of the 184 detected variable stars in NGC 884. These variable stars are listed in tables 3 and A.1 of the paper. The CCD images were calibrated and reduced as described in sections 4 and 5 of the paper. (2 data files).

CBET 2332 available at Central Bureau for Astronomical Telegrams.

CBET 2332 available at Central Bureau for Astronomical Telegrams.

CBET 2332 available at Central Bureau for Astronomical Telegrams.

We investigate the transverse oscillations of a line-tied multi-stranded coronal loop composed of several parallel cylindrical strands. First, the collective fast normal modes of the loop are found with the T-matrix theory. There is a huge quantity of normal modes with very different frequencies and a complex structure of the associated magnetic

The quasi-cw stimulated Raman technique is a powerful tool for the determination of collisional broadening and line-mixing parameters, which bear a very direct relationship with the rotational energy transfer rate constants matrix at the state-to-state level. Indeed, the broadening coefficients and the analysis of line-mixing profiles, frequently