FORS2 Grism Efficiencies
GRIS_1400V+18
This grism is based on a Volume Phased Holographic Grating
4000.10
4100.16
4250.27
4500.49
4750.71
5000.83
5250.87
5500.80
5750.67
6000.49
6250.32
6500.18
GRIS_1200R
This grism is based on a Volume Phased Holographic Grating
540 13.9
550 20.46
560 28.38
570 36.85
580 45.61
590 54.5
600 63.11
610 70.66
620 77.62
630 83.29
640 87.67
650 90.3
660 91.4
670 91.28
680 89.35
690 85.81
700 81.01
710 75.23
720 68.68
730 61.84
740 53.88
750 46.45
760 38.8
770 32.03
780 24.99
790 18.93
800 12.96
GRIS_1028z+29
This grism is based on a Volume Phased Holographic Grating
nm efficiency
7500.43
7750.59
8000.74
8250.84
8500.89
8740.89
9000.83
9250.72
9500.59
9750.44
9800.41
GRIS_600B+22
nm efficiency
330 0.55
350 0.63
375 0.67
400 0.68
450 0.61
500 0.53
550 0.46
600 0.37
650 0.32
700 0.26
GRIS_600R+24
nm efficiency
425 0.38
450 0.43
475 0.48
500 0.50
550 0.52
600 0.49
650 0.45
700 0.42
750 0.37
800 0.34
850 0.31
900 0.27
950 0.23
GRIS_600RI+19
This grism is based on a Volume Phased Holographic Grating
nm efficiency
4850.29
5000.32
5250.38
5500.45
5750.51
6000.58
6250.65
6500.71
6750.77
7000.82
7250.86
7500.87
7750.86
8000.85
8250.81
8500.76
8750.70
9000.62
9250.54
9500.45
9750.36
10000.28
GRIS_600I+25
nmefficiency
450 0.28
500 0.43
550 0.54
600 0.57
650 0.56
700 0.55
800 0.47
900 0.41
1000 0.34
GRIS_600z+23
This grism is based on a Volume Phased Holographic Grating
nmefficiency
8000.69
8250.76
8500.82
8750.86
9000.88
9250.88
9500.86
9750.84
10000.80
GRIS_300V+20
nmefficiency
330 0.48
350 0.62
375 0.72
400 0.78
450 0.79
500 0.74
550 0.63
600 0.55
650 0.48
700 0.42
750 0.37
800 0.33
850 0.29
900 0.25
GRIS_300I+21
nm efficiency
500 0.14
550 0.31
600 0.47
650 0.58
700 0.66
750 0.69
800 0.70
850 0.67
900 0.65
950 0.61
1000 0.57
1050 0.53
1100 0.50
1150 0.43
GRIS_200I+28
nm efficiency
550 0.10
560 0.33
580 0.56
600 0.67
650 0.75
700 0.78
750 0.77
800 0.75
900 0.67
1000 0.58
1100 0.50
GRIS_150I+27
nm efficiency
340 0.30
360 0.44
375 0.53
400 0.66
450 0.78
500 0.80
550 0.76
600 0.70
650 0.62
700 0.56
800 0.44
900 0.35
1000 0.28
1100 0.22
EGRIS_110B+98
Echelle grism
4th order
---------
nm efficiency
750 0.05
800 0.14
825 0.20
850 0.24
875 0.27
900 0.29
925 0.29
950 0.27
975 0.25
1000 0.21
5th order
---------
nm efficiency
625 0.05
650 0.14
675 0.21
700 0.28
725 0.29
750 0.30
775 0.28
800 0.26
825 0.23
850 0.18
875 0.15
900 0.11
925 0.08
6th order
---------
nm efficiency
550 0.07
575 0.16
600 0.25
625 0.27
650 0.25
675 0.22
700 0.17
725 0.14
750 0.09
775 0.07
800 0.05
7th order
---------
nm efficiency
512 0.15
525 0.18
537 0.21
550 0.24
562 0.26
575 0.23
600 0.18
625 0.13
650 0.08
8th order
---------
nm efficiency
450 0.09
462 0.14
475 0.21
481 0.23
488 0.26
494 0.26
500 0.26
506 0.25
512 0.23
525 0.20
550 0.11
575 0.05
9th order
---------
nm efficiency
400 0.02
412 0.08
425 0.19
438 0.25
450 0.26
462 0.23
475 0.18
500 0.07
525 0.02
10th order
----------
nm efficiency
375 0.05
388 0.17
400 0.25
412 0.25
425 0.18
438 0.13
450 0.09
475 0.02
11th order
----------
nm efficiency
350 0.08
362 0.18
375 0.25
388 0.20
400 0.16
412 0.08
425 0.03
12th order
----------
nm efficiency
332 0.06
338 0.11
344 0.18
350 0.21
356 0.22
362 0.22
375 0.14
388 0.06
XGRIS_600B+92
Cross disperser grism for the echelle EGRIS_110B+98
nm efficiency
325 0.25
350 0.47
375 0.58
400 0.65
450 0.66
500 0.63
550 0.56
600 0.48
700 0.35
800 0.25