ETC Request ID: STIS.sp.1012439

Exposure time (seconds) = 2,270.0000 at wavelength 1343.00 Å

gives: SNR = 2.9383 (per resolution element)


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x 7 pix) (2 pix resel x 7 pix)
    Source 0.004 17.78 4.22
    Background 0.004 15.89 3.99
        Sky 3.967e-15 1.80e-11 4.24e-06
        Dark Current 0.004 15.89 3.99
Total in selected region 0.007 33.67 6.05
Brightest Pixel (single exposure) (at 1332.45 Å) 0.002 5.35
Count rate entire detector 741.560
Buffer Time (sec) 2,697.02
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 127.048 288,398.113
    Background (sky+dark) 524.310 1,190,182.77
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1343
Grating: [E140H] R ~ 114000
Aperture: 0.2X0.2
Glow region: high


Target: [point source]
Spectrum: Non-stellar Objects QSO (FOS based) [100, 3387 Å z=0]
Extinction E(B-V): None
Normalization: Flux 6e-14 flam at 1307.0 Å
Redshift: z=0.29
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2