...USA
1
...(FNRS)
2
...Canada
1
...21218
1
...5-26555.
2
...Fellow.
3
...Fellow.
4
...Investigator.
5
...with
The optical passbands are on an ``AB''--normalized system, whereas the K magnitudes are the standard system. A flat spectrum (1299#1299) source has 1300#1300
...M,
The parameters of the IMF are relevant for extrapolating the observed rate of formation of massive and short-lived stars to the total SFR; for our purposes the slope of the IMF is the important parameter, while the upper mass cut-off has only a minor effect---see Table 2 of Leitherer et al. 1995.
...Japan
1
...Fellow
2
...Dobrzycki
1
...USA
2
...USA
1
...Germany
1
...Observatory
2
...archive
3
...89154
1
...STScI.
2
...Italy
1
...Germany
1
...U.S.A
1
...94720-3411
1
...Italy
1
...Italy
2
...IZw18
1
...White
1
...Sweden
2
...Sweden
3
...USA
4
...USA
5
...Germany
6
...USA
7
...USA
8
...USA
9
...diagnostic.
There is NV3123#3123 and NIV3124#3124. However, NIV3125#3125 is a dielectronic recombination line and therefore, it is sensitive to the N3126#3126 population as is the NV3127#3127 line.
...Israel
1
...Canada
2
...USA
1
...shown
Data sets number 1 and 4 exhibit much higher noise possibly due to higher HST jitter and are, therefore, not included in the analysis.
...amplify
A different analysis of HST data is described in the article Are the Pulses of Crab Pulsar Modulated? (to appear in A&A).
...is
A similar peak appears at the channel number 405, corresponding to frequency 3656#3656. We have no possibility to observe at this frequency in Asiago, so that we do not wish to speculate on its significance.
...France
1
...Paresce
1
...France
2
...USA
3
...Russia
4
...Germany
5
...acauleteso.org
1
...Chile
1
...Germany
1
...France
2
...USA
1
...France
2
...France
1

payne@stsci.edu