ETC Request ID: STIS.ta.1010414

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0217 seconds

gives: Time to Saturation (for a single exposure) = 1.13 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.0216758 is less than the minimum exposure time for this detector (0.1)


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 522,540.220 11,326.48 106.43
    Background 23.751 0.51 0.72
        Sky 5.319 0.12 0.34
        Dark Current 18.432 0.40 0.63
    Read Out 262.40
Total in selected region 522,563.971 11,327.00 283.16
Brightest Pixel (single exposure) 106,178.086 2,301.50
Global Count Rates
    Source only 570,114.504 12,357.694
    Background (sky+dark) 19,044.573 412.81
Background per unit area
    Sky Background (arcsec-2) 33.243 0.721
    Dark Current (arcsec-2) 7.200 0.156
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 64.00
    Fraction of flux 0.92
    Fraction of flux in brightest pixel 0.19
Effective Wavelength 7271.12 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 52X0.1
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Black body at 3300.0K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.81 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2