ETC Request ID: STIS.sp.1156106

Exposure time (seconds) = 5,520.0000 at wavelength 1540.00 Å

gives: SNR = 7.1356 (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 0.005 60.65 7.79
    Background 0.001 11.59 3.40
        Sky 5.291e-11 5.84e-07 7.64e-04
        Dark Current 0.001 11.59 3.40
Total in selected region 0.007 72.24 8.50
Brightest Pixel (single exposure) (at 1217.70 Å) 0.012 64.76
Count rate entire detector 275.944
Buffer Time (sec) 7,247.85
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 5.506 30,391.552
    Background (sky+dark) 270.438 1,492,819.57
Encircled energy fraction 0.84

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength:
Grating: [G140L] R ~ 1000
Aperture: 52X0.2
Glow region: low


Target: [point source]
Spectrum: Black body at 10000.0K
Extinction E(B-V): None
Normalization: Flux 9.6e-16 flam at 1928.0 Å
Redshift: None
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