ETC Request ID: STIS.ta.1036172

Requested Signal/Noise Ratio = 40.000

gives: Time = 180.4975 seconds

gives: Time to Saturation (for a single exposure) = 86,942.10 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 11.825 2,134.41 46.20
    Background 0.597 107.74 10.38
        Sky 0.435 78.50 8.86
        Dark Current 0.162 29.24 5.41
    Read Out 24.60
Total in selected region 12.422 2,242.15 53.36
Brightest Pixel (single exposure) 1.380 249.13
Global Count Rates
    Source only 37.150 6,705.441
    Background (sky+dark) 46,585.728 8,408,609.63
Background per unit area
    Sky Background (arcsec-2) 19.330 3,489.001
    Dark Current (arcsec-2) 7.200 1,299.582
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
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: [extended source]
Source diameter (arcsec): 0.3
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 19.0 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2