P200 Filter Sensitivities and Sky Background

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U B V Rc Ic u' g' r' i' z' J H Ks K Notes
λeff
(Å, µm)
3640 4410 5470 6490 8020 3550 4670 6160 7470 8920 1.2483 1.6313 2.145 2.201
FWHM
(Å, µm)
524 1008 826 1576 1543 599 1379 1382 1535 1370 0.162 0.296 0.32 0.34
fν
(Jy, 10-26 W/m2/Hz)
1810 4260 3631 3080 2550 1545 3991 3174 2593 2222 1530 1019 667 631 0m Vega
fλ
(10-12 erg/cm2/s/Å)
4190 6601 3641 2190 1166 3666 5410 2500 1390 832 294 114 43 39
Nλ
(phot/cm2/s/Å)
760 1460 1000 720 490 653 1270 774 522 373 185 93 45 43 0m Vega
Nominal extinction
(mag/airmass)
0.56 0.27 0.13 0.08 0.05 0.62 0.20 0.10 0.06 0.04 0.05 0.03 0.05 0.05
Aube data 22.4 21.3 22.2 20.9 May 2005
P200 dark sky
background
(mag/arcsec2)
21.8 20.7 19.9 18.6 15.4 13.9 12.5 May 2007

Data for LFC, WIRC, and PHARO

Instr. Pixel
(arcsec2)
P200
area (m2)
Gain
(e/DN)
u' g' r' i' z' J H Ks Notes
Detective quantum efficiency  LFC 17.8 0.18 2.0 12% 24% 45% 47% 19% above atmos­phere to detector
 WIRC 13 0.25 5.3 17% 21% 33%
 PHARO 16 0.025 1.9 23% 29% 50%
Zeropoint
(1e/sec)
 LFC 24.9 27.3 27.4 27.1 26.1 M1 mag
 WIRC 24.6 24.9 24.4
 PHARO 25mas/std-cross 24.8 25.1 24.7
Measured sky
background
(e/sec/arcsec2)
 LFC 247 741 1173 1420 2005
 WIRC 4700 23080 58000
 LFC 173 520 820 990 2007
 PHARO 7300 44000 101000

References

  1. Hewett et al, MNRAS 367, 1365, 2006 (see eg. Table 7)
  2. Fukugita etal. AJ 111, 1748, 1996 (eg. Tables 2)
  3. Bessell ARA&A, 43, 293, 2005 (eg. Fig 4)
  4. Mag-to-Jy, Spitzer
  5. UKIDSS WFCAM filters
  6. Cambridge WFCAM filter reference Intrinsic colors and system inter-relations
  7. Bessell & Brett, PASP 100, 1134, 1988 (eg. Tables IV, V)
  8. Bessell, PASP 102, 1181, 1990 (eg. Table 2)

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Filters & Sky / v 2.0
Last updated: 11 June 2015 ACM