ETC Request ID: STIS.ta.1011684

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2655 seconds

gives: Time to Saturation (for a single exposure) = 43.45 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 7,791.008 2,068.27 45.48
    Background 0.597 0.16 0.40
        Sky 0.435 0.12 0.34
        Dark Current 0.162 0.04 0.21
    Read Out 24.60
Total in selected region 7,791.605 2,068.43 51.71
Brightest Pixel (single exposure) 2,761.553 733.11
Global Count Rates
    Source only 15,582.016 4,136.541
    Background (sky+dark) 46,585.728 12,367.06
Background per unit area
    Sky Background (arcsec-2) 19.330 5.131
    Dark Current (arcsec-2) 7.200 1.911
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 0.18
Effective Wavelength 7521.01 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.32 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2