ETC Request ID: STIS.sp.826939
Exposure time (seconds) = 1,204.0000 at wavelength 3085.00 Å
gives: SNR = 67.1052 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 26.0472 is less than minimum 99 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 | 1.962 | 4,723.85 | 68.73 |
| Background | 0.011 | 25.28 | 5.03 |
| Sky | 3.616e-10 | 8.71e-07 | 9.33e-04 |
| Dark Current | 0.011 | 25.28 | 5.03 |
| Total in selected region | 1.972 | 4,749.13 | 70.39 |
| Brightest Pixel (single exposure) (at 2825.60 Å) | 1.663 | 2,002.33 | |
| Count rate entire detector | 76,783.756 | ||
| Buffer Time (sec) | 26.05 | ||
| 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 | 70,686.924 | 85,107,056.628 | |
| Background (sky+dark) | 1,572.865 | 1,893,729.86 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2962 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 31X0.05NDA |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models A5V 8250 4.0 |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 3.86 in filter Johnson/V |
| 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
