ETC Request ID: STIS.im.1014493

Exposure time (seconds) = 585.0000

gives: SNR = 189.6591

gives: Optimum SNR = 212.1850


Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (circle with radius 0.23 arcsec)
    Source 61.983 36,260.08 190.42
    Background 0.499 291.84 17.08
        Sky 0.079 46.14 6.79
        Dark Current 0.420 245.70 15.67
Total in selected region 62.482 36,551.92 191.19
Brightest Pixel (single exposure) 19.371 11,332.32
Count rate entire detector 1,945.881
Buffer Time (sec) 1,027.81
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 77.479 45,325.096
    Background (sky+dark) 1,868.403 1,093,015.55
Background per unit area
    Sky Background (arcsec-2) 0.473 276.943
    Dark Current (arcsec-2) 2.519 1,473.898
Extraction region
circle with radius 0.23 arcsec
    Effective Sky Area (pixels) 279.85
    Fraction of flux 0.80
    Fraction of flux in brightest pixel 0.25
Effective Wavelength 2472.62 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 5e-16 flam at 2360.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2