ETC Request ID: STIS.sp.1184870
Exposure time (seconds) = 480.0000 at wavelength 2818.00 Å
gives: SNR = 53.0379 (per resolution element)
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 | 2.941 | 2,823.06 | 53.13 |
| Background | 0.011 | 10.08 | 3.18 |
| Sky | 1.023e-06 | 9.82e-04 | 0.03 |
| Dark Current | 0.011 | 10.08 | 3.17 |
| Total in selected region | 2.951 | 2,833.14 | 53.23 |
| Brightest Pixel (single exposure) (at 2773.27 Å) | 1.288 | 618.31 | |
| Count rate entire detector | 4,922.554 | ||
| Buffer Time (sec) | 406.29 | ||
| 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 | 3,349.573 | 1,607,795.191 | |
| Background (sky+dark) | 1,572.981 | 755,030.74 | |
| Encircled energy fraction | 0.87 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2818 |
| Grating: | [G230M] R ~ 10000 |
| Aperture: | 52X2 |
| Target: [point source] | |
| Spectrum: | Standard HST Star Spectra AGK+81°266 (sdO, 11.94) [1148.6, 24955.1 Å] |
| 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 26.1
