ETC Request ID: STIS.sp.1006334

Exposure time (seconds) = 1,500.0000 at wavelength 1500.00 Å

gives: SNR = 18.3599 (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 0.127 382.44 19.56
    Background 0.001 3.15 1.77
        Sky 3.551e-14 1.07e-10 1.03e-05
        Dark Current 0.001 3.15 1.77
Total in selected region 0.129 385.59 20.83
Brightest Pixel (single exposure) (at 1436.46 Å) 0.061 91.47
Count rate entire detector 6,511.075
Buffer Time (sec) 307.17
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 3,827.501 5,741,251.684
    Background (sky+dark) 157.419 236,127.76
Encircled energy fraction 0.95

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1425
Grating: [E140M] R ~ 45800
Aperture: 0.2X0.2
Glow region: low


Target: [point source]
Spectrum: Bruzual Synthetic Stellar Spectra B2 V
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.46 applied before normalization
Normalization: Renormalized to vegamag = 10.08 in filter Johnson/V
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