ETC Request ID: STIS.im.1007309

Exposure time (seconds) = 3,000.0000

gives: SNR = 131.2678


Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (circle with radius 0.5 arcsec)
    Source 7.302 21,906.07 148.01
    Background 1.981 5,943.13 77.09
        Sky 0.001 3.13 1.77
        Dark Current 1.980 5,940.00 77.07
Total in selected region 9.283 27,849.19 166.88
Brightest Pixel (single exposure) 0.007 21.11
Count rate entire detector 2,041.022
Buffer Time (sec) 979.90
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 467.329 1,401,988.211
    Background (sky+dark) 1,573.693 4,721,077.50
Background per unit area
    Sky Background (arcsec-2) 0.001 3.981
    Dark Current (arcsec-2) 2.519 7,558.452
Extraction region
circle with radius 0.5 arcsec
    Effective Sky Area (pixels) 1,319.20
Effective Wavelength 1999.17 Å

Instrument name: STIS
Mode: imaging
Detector: NUVMAMA
Aperture: F25CIII


Target: [extended source]
Source diameter (arcsec): 8.0
Spectrum: Flat in units of Fν
Extinction E(B-V): None
Normalization: Flux 4.9e-15 flam at 1909.0 Å
Redshift: z=0.00036
Emission Lines:
Line at Center 1909.8 Å    FWHM 1.0 Å   Flux 3.9e-14 Fλ


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2