ETC Request ID: STIS.ta.1366542

Requested Signal/Noise Ratio = 40.000

gives: Time = 221.9122 seconds

gives: Time to Saturation (for a single exposure) = 103,141.66 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 9.805 2,175.75 46.64
    Background 0.666 147.90 12.16
        Sky 0.432 95.97 9.80
        Dark Current 0.234 51.93 7.21
    Read Out 25.20
Total in selected region 10.471 2,323.65 54.39
Brightest Pixel (single exposure) 1.163 258.18
Global Count Rates
    Source only 54.759 12,151.702
    Background (sky+dark) 54,817.750 12,164,729.16
Background per unit area
    Sky Background (arcsec-2) 19.221 4,265.305
    Dark Current (arcsec-2) 10.400 2,307.887
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
Effective Wavelength 7520.16 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): 0.4
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Renormalized to abmag = 19.54 in filter Sloan/G
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2