ETC Request ID: STIS.sp.828013

Exposure time (seconds) = 2,300.0000 at wavelength 2026.00 Å

gives: SNR = 7.9439 (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 pix) (2.0 pix resel x pix)
    Source 0.022 99.19 9.96
    Background 0.011 48.30 6.95
        Sky 6.777e-11 3.12e-07 5.58e-04
        Dark Current 0.011 48.30 6.95
Total in selected region 0.032 147.49 12.49
Brightest Pixel (single exposure) (at 2086.35 Å) 0.012 27.11
Count rate entire detector 2,448.352
Buffer Time (sec) 816.88
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 589.953 1,356,890.893
    Background (sky+dark) 1,572.864 3,617,587.20
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 1963
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Flux 3e-13 flam at 2025.0 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 24.2