ETC Request ID: STIS.im.828069

Exposure time (seconds) = 585.0000

gives: SNR = 121.0312

gives: Optimum SNR = 135.5313


Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (circle with radius 0.231 arcsec)
    Source 25.534 14,937.13 122.22
    Background 0.503 294.27 17.15
        Sky 0.082 47.70 6.91
        Dark Current 0.421 246.58 15.70
Total in selected region 26.037 15,231.40 123.42
Brightest Pixel (single exposure) 7.981 4,668.90
Count rate entire detector 1,909.711
Buffer Time (sec) 1,047.28
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 31.917 18,671.409
    Background (sky+dark) 1,877.794 1,098,509.52
Background per unit area
    Sky Background (arcsec-2) 0.488 285.744
    Dark Current (arcsec-2) 2.519 1,473.898
Extraction region
circle with radius 0.231 arcsec
    Effective Sky Area (pixels) 280.36
    Fraction of flux 0.80
    Fraction of flux in brightest pixel 0.25
Effective Wavelength 2471.39 Å

Instrument name: STIS
Mode: imaging
Detector: NUVMAMA
Aperture: F25QTZ


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 1.99e-16 flam at 2359.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2