ETC Request ID: STIS.sp.1007559
Requested Signal/Noise Ratio = 5.000 at wavelength 2850.00 Å (per resolution element)
gives: Time = 4,690.1795 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 | 0.007 | 63.68 | 7.98 |
| Background | 0.011 | 98.51 | 9.93 |
| Sky | 1.875e-06 | 0.02 | 0.13 |
| Dark Current | 0.011 | 98.49 | 9.92 |
| Total in selected region | 0.017 | 162.19 | 12.74 |
| Brightest Pixel (single exposure) (at 2798.40 Å) | 0.058 | 273.83 | |
| Count rate entire detector | 1,581.719 | ||
| Buffer Time (sec) | 1,264.45 | ||
| 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 | 7.113 | 33,359.780 | |
| Background (sky+dark) | 1,574.606 | 7,385,186.72 | |
| Encircled energy fraction | 0.87 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: gj1132.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
