ETC Request ID: STIS.sp.1006110

Requested Signal/Noise Ratio = 30.000 at wavelength 1215.67 Å (per resolution element)

gives: Time = 18,188.7449 seconds


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x 7 pix) (2 pix resel x 7 pix)
    Source 0.052 1,875.78 43.31
    Background 0.056 2,033.73 45.10
        Sky 0.055 1,995.54 44.67
        Dark Current 0.001 38.20 6.18
Total in selected region 0.107 3,909.52 62.53
Brightest Pixel (single exposure) (at 1215.70 Å) 0.026 479.27
Count rate entire detector 196.042
Buffer Time (sec) 10,201.89
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 0.732 13,315.903
    Background (sky+dark) 195.310 3,552,443.46
Encircled energy fraction 0.76

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1222
Grating: [G140M] R ~ 10000
Aperture: 52X0.1
Glow region: low


Target: [point source]
Spectrum: Castelli-Kurucz Models K2V 4750 4.5
Extinction E(B-V): None
Normalization: Renormalized to abmag = 18.85 in filter Galex/NUV
Redshift: None
Emission Lines:
Line at Center 1215.67 Å    FWHM 0.5 Å   Flux 3.4497e-14 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2