ETC Request ID: STIS.sp.1156121

Exposure time (seconds) = 3,000.0000 at wavelength 1500.00 Å

gives: SNR = 12.6930 (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 7 pix) (2 pix resel x 7 pix)
    Source 0.031 186.89 13.67
    Background 0.001 6.30 2.51
        Sky 3.551e-14 2.13e-10 1.46e-05
        Dark Current 0.001 6.30 2.51
Total in selected region 0.032 193.19 14.72
Brightest Pixel (single exposure) (at 1332.93 Å) 0.018 53.76
Count rate entire detector 2,112.167
Buffer Time (sec) 946.89
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 1,177.559 3,532,677.131
    Background (sky+dark) 157.419 472,255.52
Encircled energy fraction 0.95

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1425
Grating: [E140M] R ~ 45800
Aperture: 0.2X0.2
Glow region: low


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 3.3e-13 flam at 1900.0 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 25.2