ETC Request ID: STIS.sp.827190
Exposure time (seconds) = 700.0000 at wavelength 2478.50 Å
gives: SNR = 48.6805 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 29.0949 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 | 1.788 | 2,502.57 | 50.03 |
| Background | 0.011 | 14.70 | 3.83 |
| Sky | 6.641e-11 | 9.30e-08 | 3.05e-04 |
| Dark Current | 0.011 | 14.70 | 3.83 |
| Total in selected region | 1.798 | 2,517.27 | 51.41 |
| Brightest Pixel (single exposure) (at 2580.76 Å) | 0.916 | 641.46 | |
| Count rate entire detector | 68,740.468 | ||
| Buffer Time (sec) | 29.09 | ||
| 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 | 52,721.807 | 36,905,264.883 | |
| Background (sky+dark) | 1,572.886 | 1,101,020.32 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2463 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 31X0.05NDA |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: zaur_hubeny_K4II_noneclipse_etc.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
