ETC Request ID: STIS.sp.1024420
Exposure time (seconds) = 465.0000 at wavelength 2796.00 Å
gives: SNR = 27.2630 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 44.4452 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 7 pix) | (2 pix resel x 7 pix) | |
| Source | 0.831 | 772.77 | 27.80 |
| Background | 0.011 | 9.77 | 3.12 |
| Sky | 2.310e-09 | 2.15e-06 | 1.47e-03 |
| Dark Current | 0.011 | 9.77 | 3.12 |
| Total in selected region | 0.841 | 782.54 | 28.35 |
| Brightest Pixel (single exposure) (at 2654.16 Å) | 1.402 | 651.79 | |
| Count rate entire detector | 44,999.239 | ||
| Buffer Time (sec) | 44.45 | ||
| 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 | 37,148.310 | 17,273,964.216 | |
| Background (sky+dark) | 1,572.864 | 731,381.82 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2713 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Kurucz Models G8V 5570 4.5 |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 5.2 in filter Johnson/U |
| Redshift: | None |
| Emission Lines: | |
| Line at | Center 2796.34 Å FWHM 0.5 Å Flux 3e-12 Fλ |
| Line at | Center 2803.51 Å FWHM 0.5 Å Flux 3e-12 Fλ |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 25.2
