ETC Request ID: STIS.im.733411

Exposure time (seconds) = 3,000.0000

gives: SNR = 219.5859


Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (circle with radius 1 arcsec)
    Source 21.402 64,206.55 253.39
    Background 7.097 21,290.22 145.91
        Sky 6.305 18,915.57 137.53
        Dark Current 0.792 2,374.65 48.73
Total in selected region 28.499 85,496.77 292.40
Brightest Pixel (single exposure) 0.005 16.20
Count rate entire detector 5,663.145
Buffer Time (sec)
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 4,252.925 12,758,776.071
    Background (sky+dark) 1,410.219 4,230,658.25
Background per unit area
    Sky Background (arcsec-2) 2.007 6,021.013
    Dark Current (arcsec-2) 0.252 755.845
Extraction region
circle with radius 1 arcsec
    Effective Sky Area (pixels) 5,276.79
Effective Wavelength 1468.67 Å

Instrument name: STIS
Mode: imaging
Detector: FUVMAMA
Aperture: F25SRF2
Glow region:


Target: [extended source]
Source diameter (arcsec): 40.0
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 3e-16 flam at 1200.0 Å
Redshift: None
Emission Lines:
Line at Center 1200.0 Å    FWHM 4.0 Å   Flux 3e-13 Fλ


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 23.2