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James Webb Space Telescope:
The Mid-Infrared Instrument (MIRI) provides:

The Mid-Infrared Instrument (MIRI)
L RS Line Sensitivit y

· Imaging in nine (9) photometric bands from 5 to 28 µm, / ~ 5, with a field of view (FOV ) 74'' x 113'' · Sub-array imaging (with shor ter exposure times) for bright targets and high sk y backgrounds! ­ SUB64 ­ 7.0'' x 7.0'' ­ SUB128 ­ 14.1'' x 14.1'' ­ SUB256 ­ 28.2'' x 28.2'' ­ BRIGHTSK Y ­ 56.3'' x 56.3'' · Coronagraphic imaging f acilit ated by thre e (3) four- quadrant pha se ma sks (4QPMs) at 10.65, 11.4, & 15.5 µm (24'' x 24''), and a Lyot coronagraph at 23 µm (30'' x 30'')! · Medium Resolution Spectrometer (MRS: / ~ 1550 ­3250), which covers wavelengths from 4.9 to 28.8 µm, enabled by four Integral Field Units (IFUs) with FOVs of 3.9'' to 7.7'' · Low Resolution Spectrometer (LRS: / ~ 100 at 7.5 µm), which covers wavelengths from 5 to ~ 14 µm using a 0.51'' x 4.7'' slit, or in SLITLESS configuration!

L RS limiting sensitivit y for the detection of a spectrally and spatially unresolved target (units of 10-20 Wat t m-2). L RS Continuum Sensitivit y

L RS limiting sensitivit y for the detection of the continuum spectrum for a spatially unresolved target (units of micro Jansk y). MRS Line Sensitivit y

frared Instrument (MIRI)
m, bright
MRS! LRS Slit! (0.51" x 4.7")!

MIRI Pocket Guide v2.2 (April 2014)!

MRS lim unre s o l v target (u fo r t he h

i t in g s e n s i t i v i t y f o r t h e d e t e c t i o n o f a n ed spectral line in a spatially unresolved nits of 10 -20 Wat t m-2). The dashed lines are igh-background case. MRS Continuum Sensitivit y

4QPM's! (24" x 24")! 10.65 µm! 11.4 µm! 15.5 µm! Lyot! (30" x 30")! 23 µm! Imager! (74" x 113")!

uadrant 24"), and µm), 0.51" x ­3250), ed by .7"!

MRS limiting sensitivit y for the detection of the continuum spectrum for a spatially unresolved target (units of milli-Jansk y). The dashed lines are for the high-background case.
!

Name! F560W! F770W!

! (µm)! 5.6! 7.7!

/
5.0! 3.5!

Point-Source! Detection Limit1! 0.2 µJy! 0.28 µJy!

Extended Source Detection Limit1! 0.22 µJy arcsec 0.26 µJy arcsec
-2! -2! -2!

Point-Source! Saturation Limit2 7 mJy! 3 mJy!


MIRI Imager

Name

(m)
5.6 7.7 10.0 11.3 12.8 15.0 18.0 21.0 25.5 6.4 9.2 14.5 22.5 7.5

/
5.0 3. 5 5.0 16.0 5.0 5.0 6.0 4.0 6.0 3250 26 50 2000 15 50 10 0

Point-Source Detection Limit1
0. 2 µ J y 0. 2 8 µ J y 0.7 µ Jy 1.7 µ Jy 1.4 µ Jy 1.8 µ Jy 4.3 µ Jy 8 .6 µ J y 28 µ Jy 1.2 x10 0.9 x10 1.1x10
-2 0 -2 0 -2 0

E x tended Source Detection Limit1
0. 2 2 µ J y a r c s e c 0. 2 6 µ J y a r c s e c 0. 5 3 µ J y a r c s e c 1.2 µ Jy arcsec
-2 -2 -2 -2 -2 -2

Point-Source Saturation Limit2
7 m Jy 3 m Jy 8 m Jy 3 5 m Jy 15 m Jy 18 m Jy 3 4 m Jy 5 0 m Jy 10 5 m Jy 2. 5 J y 1.5 Jy 2. 5 J y 6 Jy 70 m J y

F56 0W F 770W F1000W F1130W F128 0W F150 0W F18 0 0W F210 0W F25 50W M RS1 MRS2 MRS 3 MRS 4 LRS
1 2

0. 8 3 µ J y a r c s e c 0.9 3 µ J y a r c s e c 1.9 µ Jy arcsec 3. 3 µ J y a r c s e c 9.1 µ Jy arcsec
-2 -2 -2 -2 -2 -2 -2

Wm Wm Wm

1.9 x10

-2 2 -2 2

W m -2 /pix (0.2" pix) W m -2 /pix (0.2"pix)

2.2 x10 1.5x10 8.7x10

-2 2 -2 2

W m -2 /pix (0.24" pix) W m -2 /pix (0.27 " pix) ...

10.4x10

-2 0

Wm

10 in for a 10,0 0 0 second on-source integration time. S aturation based on 13% of flux falling within the brightest pixel for 8 µm and 13 % x (8 µm/)2 for > 8 µm. 8 µ Jy

Theamera.as.arizona.edu/MIRI/ Instrument (MIRI) ht tp://irc Mid-Infrared
Operated for NASA by AURA

ht tp://w w w.stsci.edu/jwst /instruments/miri

AC SP E TELESCOPE SCIENCE INSTITUTE

MIRI Pocket Guide v2.2 (April 2014)!

ht tp://w w w.jstor.org/stable/10.1086/682264
he Mid-Infrared Instrument (MIRI) provides:! Imaging in nine (9) photometric bands from 5 to 28 µm, / ~ 5, with a field of view (FOV) 74" x 113" !
LRS Slit! (0.51" x 4.7")!

Revised 12/15/2015

4QPM's! (24" x 24")!