ETC Request ID: STIS.ta.996462

Exposure time (seconds) = 3.0000

gives: SNR = 90.3015

gives: Time to Saturation (for a single exposure) = 84.12 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 2,907.551 8,722.65 93.40
    Background 0.910 2.73 1.65
        Sky 0.748 2.24 1.50
        Dark Current 0.162 0.49 0.70
    Read Out 24.60
Total in selected region 2,908.461 8,725.38 96.59
Brightest Pixel (single exposure) 1,426.533 4,279.60
Global Count Rates
    Source only 5,505.827 16,517.481
    Background (sky+dark) 106,012.717 318,038.15
Background per unit area
    Sky Background (arcsec-2) 33.241 99.722
    Dark Current (arcsec-2) 7.200 21.600
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
    Fraction of flux 0.50
    Fraction of flux in brightest pixel 0.25
Effective Wavelength 5301.86 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: 50CCD
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Power Law with index -2.3
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.02 applied before normalization
Normalization: Flux 6e-15 flam at 2000.0 Å
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.1.1