ETC Request ID: STIS.ta.1009792

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2554 seconds

gives: Time to Saturation (for a single exposure) = 32.56 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 8,096.515 2,068.20 45.48
    Background 0.162 0.04 0.20
        Sky 8.945e-06 2.28e-06 1.51e-03
        Dark Current 0.162 0.04 0.20
    Read Out 24.60
Total in selected region 8,096.677 2,068.24 51.70
Brightest Pixel (single exposure) 3,685.348 941.40
Global Count Rates
    Source only 16,193.029 4,136.393
    Background (sky+dark) 18,874.616 4,821.38
Background per unit area
    Sky Background (arcsec-2) 3.975e-04 1.015e-04
    Dark Current (arcsec-2) 7.200 1.839
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 0.23
Effective Wavelength 5979.84 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B0V 30000 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.1 applied before normalization
Normalization: Renormalized to vegamag = 2.89 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2