ETC Request ID: STIS.sp.1011967
Requested Signal/Noise Ratio = 3.000 at wavelength 2500.00 Å (per resolution element)
gives: Time = 2,387.3464 seconds
Table of Source and Noise Counts per Pixel
| 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 | 0.005 | 26.21 | 5.12 |
| Background | 0.011 | 50.14 | 7.08 |
| Sky | 8.023e-07 | 3.83e-03 | 0.06 |
| Dark Current | 0.011 | 50.13 | 7.08 |
| Total in selected region | 0.016 | 76.35 | 8.74 |
| Brightest Pixel (single exposure) (at 2905.60 Å) | 0.019 | 45.64 | |
| Count rate entire detector | 1,585.612 | ||
| Buffer Time (sec) | 1,261.34 | ||
| 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. | |||
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| Global Count Rates | |||
| Source only | 11.006 | 26,275.171 | |
| Background (sky+dark) | 1,574.606 | 3,759,130.95 | |
| Encircled energy fraction | 0.86 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: 659faint.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
These results were computed using: ETC version 25.2
