ETC Request ID: STIS.sp.1365746

Exposure time (seconds) = 1,000.0000 at wavelength 3012.00 Å

gives: SNR = 0.1574 (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 4.229e-04 0.85 0.92
    Background 0.014 28.00 5.29
        Sky 3.937e-09 7.87e-06 2.81e-03
        Dark Current 0.014 28.00 5.29
Total in selected region 0.014 28.85 5.37
Brightest Pixel (single exposure) (at 3065.61 Å) 6.086 6,085.92
Count rate entire detector 2,836.892
Buffer Time (sec) 705.00
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 709.242 709,242.353
    Background (sky+dark) 2,097.152 2,097,152.08
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 3012
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: User uploaded spectrum: watlas-H.dat
Extinction E(B-V): None
Normalization: None
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 27.2