ISO First Light

Fig. 1: Unprocessed 7 mic ISOCAM image of M51, as seen in real time on 28/Nov/1995. Integration time was 130 sec, scale is 6 arcsec/pix, and total field is 3x3 arcmin. The nucleus is to the upper right, and two segments of spiral arms are clearly visible. Orientation: N is about 28 deg left of down; E is about 28 deg above left.

Fig. 2: M51 as seen from IRAS in its 8-15 mic band. IRAS's mission was to map the entire sky at 4 wavelengths, and images such as this can be produced from the data. The square shows approximately the area covered by the CAM image in Fig. 1.

Fig. 3: First ISOPHOT light from the star Gamma Draconis (29/Nov/1995). The output of the PHT P1 detector is shown as a function of time: the 3.29 mic filter was selected, and the spacecraft was commanded to scan the PHT entrance aperture over the source.