ETC Request ID: STIS.ta.827863

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.1542 seconds

gives: Time to Saturation (for a single exposure) = 15.60 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 13,591.716 2,096.32 45.79
    Background 0.172 0.03 0.16
        Sky 0.001 1.63e-04 0.01
        Dark Current 0.171 0.03 0.16
    Read Out 25.50
Total in selected region 13,591.888 2,096.35 52.41
Brightest Pixel (single exposure) 7,691.990 1,186.37
Global Count Rates
    Source only 27,183.432 4,192.638
    Background (sky+dark) 19,990.111 3,083.18
Background per unit area
    Sky Background (arcsec-2) 0.047 0.007
    Dark Current (arcsec-2) 7.600 1.172
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 0.28
Effective Wavelength 3738.14 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra B2 V
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.01 applied before normalization
Normalization: Renormalized to vegamag = 9.9 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2