ETC Request ID: STIS.sp.1368400
Requested Signal/Noise Ratio = 20.000 at wavelength 2852.00 Å (per resolution element)
gives: Time = 812.7885 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 | 0.265 | 430.39 | 20.75 |
| Background | 0.014 | 22.76 | 4.77 |
| Sky | 1.084e-09 | 1.76e-06 | 1.33e-03 |
| Dark Current | 0.014 | 22.76 | 4.77 |
| Total in selected region | 0.279 | 453.14 | 21.52 |
| Brightest Pixel (single exposure) (at 2826.60 Å) | 0.134 | 109.23 | |
| Count rate entire detector | 8,803.434 | ||
| Buffer Time (sec) | 227.18 | ||
| 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 | 6,180.904 | 5,023,767.468 | |
| Background (sky+dark) | 2,097.152 | 1,704,541.13 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2912 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 0.2X0.09 |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models A3V 8750 4.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.03 applied before normalization |
| Normalization: | Renormalized to vegamag = 8.22 in filter Johnson/U |
| 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
