CSHELL Throughput
MOST RECENT THROUGHPUT MEASUREMENTS
Taken by John Rayner on 15 March 1998 (1" seeing at 2.2 μm)
λ(μm) |
Standard |
Magnitude |
Cont. Spect |
Stellar Image |
Stellar Spect |
1.2537 |
HD 77281 |
J = 7.11 |
260 / 5 sec |
62,500 / 2 sec |
3,200 / 60 sec |
1.6593 |
HD 77281 |
H=7.05 |
710 / 5 sec |
60,500 / 2 sec |
3,800 / 60 sec |
2.1698 |
HD 77281 |
K=7.03 |
1,300 / 5 sec |
48,700 / 1 sec |
4,500 / 60 sec |
3.5260 |
HR 4828 |
L=4.68 |
650 / 5 sec |
19,800 / 0.1 sec |
26,000 / 60 sec |
4.7010 |
HR 4828 |
M=4.69 |
5,350 / 5 sec |
5,700 / 0.1 sec |
2,200 / 10 sec |
HISTORICAL THROUGHPUT MEASUREMENTS
Taken by John Rayner in 1997
λ(μm) |
Standard |
Magnitude |
Cont. Spect |
Stellar Image |
Stellar Spect |
1.2537 |
HD 77281 |
J = 7.11 |
300 / 5 sec |
59,921 / 2 sec |
3,968 / 60 sec |
1.6593 |
HD 77281 |
H=7.05 |
820 / 5 sec |
51,110 / 2 sec |
5,462 / 60 sec |
2.1698 |
HD 77281 |
K=7.03 |
1,502 / 5 sec |
46,029 / 1 sec |
4,833 / 60 sec |
3.5260 |
HR 4828 |
L=4.68 |
542 / 5 sec |
19,174 / 0.1 sec |
32,000 / 60 sec |
4.7010 |
HR 4828 |
M=4.69 |
3,150 / 5 sec |
8,432 / 0.1 sec |
2,500 / 10 sec |
LAST UPDATE: February 1, 2010 (format only)