ETC Request ID: STIS.sp.1365744

Exposure time (seconds) = 1,000.0000 at wavelength 2663.00 Å

gives: SNR = 0.2796 (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 7.602e-04 1.52 1.23
    Background 0.014 28.00 5.29
        Sky 3.250e-09 6.50e-06 2.55e-03
        Dark Current 0.014 28.00 5.29
Total in selected region 0.015 29.52 5.44
Brightest Pixel (single exposure) (at 2660.24 Å) 9.409 9,409.21
Count rate entire detector 2,916.256
Buffer Time (sec) 685.81
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 688.323 688,322.602
    Background (sky+dark) 2,097.152 2,097,152.05
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2663
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