ETC Request ID: STIS.sp.1366571
Requested Signal/Noise Ratio = 0.200 at wavelength 2561.00 Å (per resolution element)
gives: Time = 1,208.8369 seconds
Table of Source and Noise Counts per Pixel
| Detailed Information | Count rate | Total counts | Associated noise |
| (counts/s) | (counts) | (counts) | |
| Counts (box 2 pixels high) | (1 pix x 2 pix) | (2 pix resel x 2 pix) | |
| Source | 2.657e-04 | 0.64 | 0.80 |
| Background | 0.004 | 9.67 | 3.11 |
| Sky | 8.910e-07 | 2.15e-03 | 0.05 |
| Dark Current | 0.004 | 9.67 | 3.11 |
| Total in selected region | 0.004 | 10.32 | 3.21 |
| Brightest Pixel (single exposure) (at 2484.80 Å) | 0.002 | 2.79 | |
| Count rate entire detector | 2,102.509 | ||
| Buffer Time (sec) | 951.24 | ||
| 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 | 1.062 | 1,284.316 | |
| Background (sky+dark) | 2,101.447 | 2,540,306.55 | |
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.5 |
| Target: [extended source] | |
| Source diameter (arcsec): | 0.4 |
| Spectrum: | Flat in units of Fλ |
| Extinction E(B-V): | None |
| Normalization: | Flux 8e-17 flam at 2561.0 Å |
| 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 27.2
