ETC Request ID: STIS.sp.821475
Requested Signal/Noise Ratio = 100.000 at wavelength 2732.00 Å (per resolution element)
gives: Time = 12,578.4527 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 pix) | (2.0 pix resel x pix) | |
| Source | 0.408 | 10,257.58 | 101.28 |
| Background | 0.011 | 264.21 | 16.25 |
| Sky | 2.498e-06 | 0.06 | 0.25 |
| Dark Current | 0.011 | 264.15 | 16.25 |
| Total in selected region | 0.418 | 10,521.79 | 102.58 |
| Brightest Pixel (single exposure) (at 2884.80 Å) | 0.370 | 4,660.24 | |
| Count rate entire detector | 1,947.963 | ||
| Buffer Time (sec) | 1,026.71 | ||
| 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 | 373.370 | 4,696,417.960 | |
| Background (sky+dark) | 1,574.593 | 19,805,945.65 | |
| 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: Mrk493_forETC_daeseong.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 24.2
