ETC Request ID: STIS.sp.1368389
Requested Signal/Noise Ratio = 10.000 at wavelength 1613.00 Å (per resolution element)
gives: Time = 10,331.1999 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 | 0.006 | 124.51 | 11.16 |
| Background | 0.001 | 21.70 | 4.66 |
| Sky | 1.024e-13 | 2.12e-09 | 4.60e-05 |
| Dark Current | 0.001 | 21.70 | 4.66 |
| Total in selected region | 0.007 | 146.21 | 12.45 |
| Brightest Pixel (single exposure) (at 1645.00 Å) | 0.004 | 42.47 | |
| Count rate entire detector | 309.083 | ||
| Buffer Time (sec) | 6,470.75 | ||
| 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 | 106.153 | 1,096,685.365 | |
| Background (sky+dark) | 157.286 | 1,624,957.23 | |
| Encircled energy fraction | 0.94 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1562 |
| Grating: | [E140H] R ~ 114000 |
| Aperture: | 0.2X0.09 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models A5V 8250 4.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.042 applied before normalization |
| Normalization: | Renormalized to abmag = 12.8 in filter Galex/FUV |
| 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
