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: http://www.stsci.edu/instrument-news/handbooks/nicmos/c14_calplan.doc6.html
Дата изменения: Thu Aug 7 20:42:47 1997 Дата индексирования: Tue Feb 5 12:21:38 2013 Кодировка: Поисковые слова: meteoroid |
Star |
K |
Sp.T. |
V |
B-V |
---|---|---|---|---|
G191B2B
|
12.7
|
DAO
|
11.781
|
-0.33
|
GD71
|
13.8
|
DA1
|
13.032
|
-0.25
|
GD153
|
14.2
|
DA1
|
13.346
|
-0.27
|
HZ43
|
13.7
|
DA1
|
12.914
|
-0.31
|
Solar Analog Absolute Standards
In order to expand the set of IR standard stars in the appropriate flux range for NICMOS, M. Rieke, R. Thompson, and collaborators at the University of Arizona are making photometric observations of solar-analog stars, which will be used to normalize the solar spectrum to the observed IR magnitudes. This method consists of several steps:
As a check on the solar analog method, the ground-based program includes observations of the WD G191B2B. Furthermore, FOS observations of three prime solar analog candidates listed in Table 15.4 were made during Cycle 6. The FOS red detector was used with the high resolution G780H, G570H, G400H and G270H to obtain high signal to noise spectra of these three candidates over the 2200 to 8500 angstroms range to verify agreement with the solar flux distribution. Additional STIS observations covering the 0.6-1.0 µm wavelength range will be obtained in Cycle 7.
1
No. indicates the number of observations in hand by the U. of Arizona group as of 96Feb22. For the Sun, B-V=0.633 (Taylor 1994), and V-I=0.703 (Bessell and Norris 1984).
|
In the Northern Hemisphere observations have been performed with a NICMOS2 array on the Mt. Lemmon 60" & Kitt Peak 90" and in the Southern Hemisphere with a NICMOS3 array on the Las Campanas 40".
The primary goals of the program were: