ETC Request ID: STIS.sp.1156105

Exposure time (seconds) = 2,022.0000 at wavelength 2246.00 Å

gives: SNR = 17.2950 (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 0.083 336.83 18.35
    Background 0.011 42.46 6.52
        Sky 6.747e-07 2.73e-03 0.05
        Dark Current 0.011 42.46 6.52
Total in selected region 0.094 379.29 19.48
Brightest Pixel (single exposure) (at 2686.40 Å) 0.053 106.52
Count rate entire detector 1,657.155
Buffer Time (sec) 1,206.89
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 82.549 166,913.557
    Background (sky+dark) 1,574.606 3,183,854.19
Encircled energy fraction 0.85

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength:
Grating: [G230L] R ~ 500
Aperture: 52X0.2


Target: [point source]
Spectrum: Black body at 10000.0K
Extinction E(B-V): None
Normalization: Flux 9e-16 flam at 2246.0 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