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Table 2:

Observation of M17 (Fig. 1).

n
Wavelength F($\lambda$)/F(H$\beta $) F($\lambda$)/F(H$\beta $) F($\lambda$)/F(H$\beta $) F($\lambda$)/F(H$\beta $)
    region A region B region C region N 3
  P H P H P H P H P H
3 - 6563 - 532 - 1102 - 667 - 510
4 - 4861 - 100 - 100 - 100 - 100
5 - 4340 - 31.8 - 22.3 - 32.0 - 29.78
6 10 938 4103 75.4 12.6 - 11.4 - 11.6 - 11.27
7 10 049 3970 37.3 6.62 250 6.7 141 (6.5) - -
8 9546 *3889 23.0 7.28 (3.86) 256 - 79.9 - - -
9 9229 3835 14.7 2.28 82.7 - 51.79 - 12.6 1.51
10 9015 3797 9.00 1.54 43.5 - 16.22 - 7.71 0.98
11 8863 3770 7.57 (6.29) 1.37 (1.12) 33.3 - - - - -
12 8750 3750 5.86 (4.47) 0.94 29.6 - - - - -

Notes. * Blend with HeI 3889 Å. Values in bracket: corrected to obtain a smooth decrement (Fig. 2).


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