Echelle Line Spread Functions

Table 13.43: Spectral Resolution for Echelle Medium-Resolution Modes (E230M, E140M).

Slit

Spectral Resolution (FWHM in pixels)

Point Source

Extended Source

1200 Å

1500 Å

1700 Å1

1700 Å2

2400 Å

0.1X0.03

0.9

0.9

1.0

1.6

1.6

~1

0.2X0.2

1.4

1.3

1.1

2.0

1.9

~6

0.2X0.06

1.3

1.2

1.1

1.8

1.7

~2

6X0.2

1.6

1.4

1.2

2  

1.9

~6

1 FWHM with FUV-MAMA (E140M).
2 FWHM with NUV-MAMA (E230M).


Figure 13.92: Echelle Line Spread Functions.


E140M (top) and E230M (bottom).

Table 13.44: Spectral Resolution for Echelle High-Resolution Modes (E140H, E230H).

Slit

Spectral Resolution (FWHM in pixels)

Point Source

Extended Source

1200 Å

1500 Å

1700 Å1

1700 Å2

2400 Å

0.1X0.03

0.8

0.8

1  

1.5

1.5

~1

0.2X0.2

1.3

1.1

1  

1.8

1.7

~6

0.2X0.09

1.2

1.1

1  

1.7

1.7

~2

6X0.2

1.4

1.2

1.2

2  

1.8

~5

1 FWHM with FUV-MAMA (E140H).
2 FWHM with NUV-MAMA (E230H).



Figure 13.93: Echelle Line Spread Functions.


E140H (top) and E230H (bottom). LSFs for E230H were derived using the 0.1X0.2 and 0.1X0.09 apertures; results for 0.2X0.2 and 0.2X0.09 should be similar.