ETC Request ID: STIS.sp.827272

Exposure time (seconds) = 5,000.0000 at wavelength 1230.00 Å

gives: SNR = 10.3969 (per resolution element)


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 pix) (2.0 pix resel x pix)
    Source 0.012 117.74 10.85
    Background 0.001 10.50 3.24
        Sky 1.427e-12 1.43e-08 1.19e-04
        Dark Current 0.001 10.50 3.24
Total in selected region 0.013 128.24 11.32
Brightest Pixel (single exposure) (at 1215.75 Å) 0.014 71.17
Count rate entire detector 249.885
Buffer Time (sec) 8,003.67
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 15.416 77,082.042
    Background (sky+dark) 234.469 1,172,345.31
Encircled energy fraction 0.77

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1222
Grating: [G140M] R ~ 10000
Aperture: 52X0.2
Glow region: low


Target: [point source]
Spectrum: Power Law with index -2.3
Extinction E(B-V): None
Normalization: Flux 5.6e-15 flam at 1528.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 24.2