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Background
The primary background sources that affect COS observations are detector dark count, earthshine, zodiacal light, and airglow emission; neither of the COS detectors suffers from read noise. For more information on COS background performance see Section 7.4 of the COS Instrument Handbook. For information on high S/N observations of the geocoronal Lyman-alpha line, please see the COS Airglow page.
Detector Dark Count Earthshine Zodiacal Light Airglow Emission
Throughput
COS is considerably more sensitive than STIS and earlier-generation HST instruments at comparable spectral resolutions, particularly in the far ultraviolet. At FUV wavelengths, the peak effective area is ~3000 cm2 near 1300 Å with the G130M grating. At NUV wavelengths, the peak effective area is expected to reach ~850 cm2 near 2250 Å with the G230L grating.
For further information, see Section 5.1.1 of the COS Instrument Handbook.
FUV High Voltage History
The COS FUV detector is a high-gain, cross delay line microchannel plate (MCP) detector. In the following links we present the high voltage history of each segment.
Date | Time | HV Level (counts) | HV Level (volts) | Description |
---|---|---|---|---|
3/27/03 | 00:00 | 178 | -5292.82 | FUV02 installed; voltage value not verified |
6/4/09 | 21:05 | 0 | -2500.00 | First HV turn on: HVON |
6/5/09 | 16:55 | 100 | -4069.00 | HV Ramp up to HVLOW |
6/6/09 | 20:51 | 154 | -4916.26 | HV Ramp Up Step 1 |
6/8/09 | 17:32 | 160 | -5010.40 | HV Ramp Up Step 2 |
6/10/09 | 19:23 | 166 | -5104.54 | HV Ramp Up Step 3 |
6/12/09 | 17:25 | 172 | -5198.68 | HV Ramp Up Step 4 |
6/14/09 | 19:00 | 178 | -5292.82 | HV Ramp Up to HVNOM |
8/5/09 | 00:00 | 169 | -5151.61 | Lowered both segments to decrease modal gain |
8/6/09 | 12:00 | 178 | -5292.82 | Return to nominal value |
8/12/09 | 00:00 | 169 | -5151.61 | Changed HVNOM to 169/167 from 178/175 |
12/21/10 | 04:00 | 178 | -5292.82 | Temporary HV increase to original values |
12/21/10 | 09:29 | 169 | -5151.61 | Return to nominal value |
2/27/12 | 12:00 | 143 | -4743.67 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 12:20 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 12:40 | 152 | -4884.88 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 12:49 | 157 | -4963.33 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 13:04 | 169 | -5151.61 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 13:20 | 175 | -5245.75 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 13:39 | 169 | -5151.61 | Return to nominal value |
2/28/12 | 03:29 | 155 | -4931.95 | HV Sweep with deuterium lamp at new lifetime position |
2/28/12 | 07:59 | 169 | -5151.61 | Return to nominal value |
3/19/12 | 00:00 | 143 | -4743.67 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 00:40 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 00:55 | 152 | -4884.88 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 01:10 | 157 | -4963.33 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 01:30 | 163 | -5057.47 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 02:00 | 169 | -5151.61 | Return to nominal value |
3/19/12 | 06:00 | 143 | -4743.67 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 06:15 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 07:00 | 152 | -4884.88 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 07:30 | 157 | -4963.33 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 08:00 | 163 | -5057.47 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 09:00 | 169 | -5151.61 | Return to nominal value |
3/19/12 | 18:10 | 143 | -4743.67 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 18:55 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 21:00 | 152 | -4884.88 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 21:20 | 157 | -4963.33 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 21:50 | 163 | -5057.47 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 22:30 | 142 | -4727.98 | HV Sweep with deuterium lamp at new lifetime position |
3/20/12 | 04:00 | 143 | -4743.67 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 04:15 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 04:45 | 152 | -4884.88 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 05:30 | 157 | -4963.33 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 06:10 | 163 | -5057.47 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 06:30 | 169 | -5151.61 | Return to nominal value |
3/22/12 | 20:00 | 147 | -4806.43 | HV Sweep with deuterium lamp at new lifetime position |
3/23/12 | 01:00 | 169 | -5151.61 | Return to nominal value |
3/25/12 | 00:00 | 162 | -5041.78 | HV Sweep with deuterium lamp at new lifetime position |
3/25/12 | 18:00 | 169 | -5151.61 | Return to nominal value |
3/26/12 | 00:00 | 178 | -5292.82 | Increased HV to compensate for gain sag |
4/16/12 | 00:00 | 167 | -5120.23 | Target ACQ testing at new lifetime position |
4/16/12 | 09:00 | 178 | -5292.82 | Return to nominal value |
4/17/12 | 04:00 | 167 | -5120.23 | G140L Focus Sweep at new lifetime position |
4/17/12 | 08:00 | 178 | -5292.82 | Return to nominal value |
5/24/12 | 00:00 | 100 | -4069.00 | HV Recovery - Day 1 |
5/25/12 | 00:00 | 154 | -4916.26 | HV Recovery Day 2 - QE grid off |
5/29/30 | 00:00 | 100 | -4069.00 | HV Recovery Day 3 - QE grid off |
5/30/12 | 00:00 | 160 | -5010.40 | HV Recovery Day 4 - QE grid off |
5/31/12 | 00:00 | 154 | -4916.26 | HV Recovery Day 5 - QE grid off |
6/1/12 | 00:00 | 166 | -5104.54 | HV Recovery Day 6 - QE grid off |
6/4/12 | 00:00 | 160 | -5010.40 | HV Recovery Day 7 - QE grid off |
6/5/12 | 00:00 | 172 | -5198.68 | HV Recovery Day 8 - QE grid off |
6/7/12 | 00:00 | 166 | -5104.54 | HV Recovery Day 9 - QE grid off |
6/8/12 | 00:00 | 178 | -5292.82 | HV Recovery Day 10 - QE grid off |
6/11/12 | 00:00 | 172 | -5198.68 | HV Recovery Day 11 - QE grid off |
6/12/12 | 00:00 | 178 | -5292.82 | HV Recovery Day 12 - QE grid off; back to HVNOM |
6/17/12 | 19:00 | 167 | -5120.23 | Target ACQ testing at new lifetime position |
6/19/12 | 02:00 | 178 | -5292.82 | Return to nominal value |
7/23/12 | 00:00 | 167 | -5120.23 | New nominal HV value of 167 at second lifetime position |
8/15/12 | 22:00 | 178 | -5292.82 | TDS old G130M/G140L target at old position |
8/16/12 | 01:00 | 167 | -5120.23 | Return to nominal values |
8/24/12 | 11:00 | 178 | -5292.82 | TDS old G160M target at old position |
8/27/12 | 09:00 | 143 | -4743.67 | HV Sweep with wavecal at same postion as previous test |
8/27/12 | 10:05 | 147 | -4806.43 | HV Sweep with wavecal at same postion as previous test |
8/27/12 | 10:15 | 152 | -4884.88 | HV Sweep with wavecal at same postion as previous test |
8/27/12 | 10:30 | 157 | -4963.33 | HV Sweep with wavecal at same postion as previous test |
8/27/12 | 10:45 | 169 | -5151.61 | HV Sweep with wavecal at same postion as previous test |
8/27/12 | 11:00 | 175 | -5245.75 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 03:00 | 157 | -4963.33 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 03:20 | 167 | -5120.23 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 03:30 | 169 | -5151.61 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 03:50 | 172 | -5198.68 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 04:00 | 175 | -5245.75 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 04:45 | 178 | -5292.82 | HV Sweep with wavecal at same postion as previous test |
8/28/12 | 18:30 | 147 | -4806.43 | HV Sweep with wavecal above the new lifetime position |
8/28/12 | 18:40 | 157 | -4963.33 | HV Sweep with wavecal above the new lifetime position |
8/28/12 | 19:00 | 167 | -5120.23 | HV Sweep with wavecal above the new lifetime position |
8/28/12 | 19:20 | 172 | -5198.68 | HV Sweep with wavecal above the new lifetime position |
8/28/12 | 20:00 | 175 | -5245.75 | HV Sweep with wavecal above the new lifetime position |
8/28/12 | 20:30 | 178 | -5292.82 | HV Sweep with wavecal above the new lifetime position |
8/28/12 | 21:00 | 167 | -5120.23 | Return to nominal values |
1/6/14 | 04:00 | 171 | -5182.99 | Characterization of gain at LP3 (LOP1) |
1/6/14 | 06:30 | 167 | -5120.23 | Return to nominal values |
2/4/14 | 09:00 | 171 | -5182.99 | Testing placement of spectra at LP3 (LOP2) |
2/4/14 | 14:50 | 167 | -5120.23 | Return to nominal values |
7/7/14 | 0:00 | 178 | -5292.82 | Testing new HV Management (LENA4/13637) |
7/7/14 | 11:57 | 167 | -5120.23 | Testing new HV Management (LENA4/13637) |
7/7/14 | 12:04 | 178 | -5292.82 | Testing new HV Management (LENA4/13637) |
7/7/14 | 12:32 | 167 | -5120.23 | Testing new HV Management (LENA4/13637) |
7/7/14 | 12:40 | 178 | -5292.82 | Testing new HV Management (LENA4/13637) |
7/7/14 | 13:08 | 167 | -5120.23 | Testing new HV Management (LENA4/13637) |
7/7/14 | 13:15 | 178 | -5292.82 | Testing new HV Management (LENA4/13637) |
7/7/14 | 14:00 | 167 | -5120.23 | Return to nominal values |
7/16/14 | 10:08 | 171 | -5182.99 | G130M/1222 focus run at LP3 (LENA2/13635) |
7/16/14 | 12:00 | 167 | -5120.23 | Return to nominal values |
9/23/14 | 14:00 | 171 | -5182.99 | Cross-Dispersion Profiles, Flux, Flat Field at LP3 - 1222 (LCAL3/13932) |
9/23/14 | 15:00 | 167 | -5120.23 | Return to nominal values |
11/3/14 | 173 | -5214.37 | ||
2/9/15 | 171 | -5182.99 | Voltage for 1222 for the move to LP3 | |
2/9/15 | 167 | -5120.23 | Voltage for standard modes for the move to LP3 |
Date | Time | HV Level (counts) | HV Level (volts) | Description |
---|---|---|---|---|
3/27/03 | 00:00 | 175 | -5245.75 | FUV02 installed; voltage value not verified |
6/4/09 | 21:05 | 0 | -2500.00 | First HV turn on: HVON |
6/5/09 | 16:55 | 100 | -4069.00 | HV Ramp up to HVLOW |
6/6/09 | 20:51 | 151 | -4869.19 | HV Ramp Up Step 1 |
6/8/09 | 17:32 | 157 | -4963.33 | HV Ramp Up Step 2 |
6/10/09 | 19:23 | 163 | -5057.41 | HV Ramp Up Step 3 |
6/12/09 | 17:25 | 169 | -5151.61 | HV Ramp Up Step 4 |
6/14/09 | 19:00 | 175 | -5245.75 | HV Ramp Up to HVNOM |
8/5/09 | 00:00 | 167 | -5120.23 | Temporarily lowered voltage to 169/167 from 178/175 to match prelaunch gain |
8/6/09 | 12:00 | 175 | -5245.75 | Return to nominal value |
8/12/09 | 00:00 | 167 | -5120.23 | Lowered both segments to decrease modal gain |
12/21/10 | 04:00 | 175 | -5242.75 | Temporary HV increase to original values |
12/21/10 | 09:29 | 167 | -5120.23 | Return to nominal value |
3/8/11 | 19:31 | 175 | -5245.75 | Increased HV to compensate for gain sag |
7/27/11 | 12:00 | 167 | -5120.23 | Lifetime Position Characterization test |
7/28/11 | 00:00 | 175 | -5290.08 | Return to nominal value |
7/30/11 | 00:00 | 167 | -5120.23 | Lifetime Position Characterization test |
7/30/11 | 15:57 | 175 | -5245.75 | Return to nominal value |
7/30/11 | 17:45 | 167 | -5120.23 | Lifetime Position Characterization test |
7/31/11 | 00:00 | 175 | -5245.75 | Return to nominal value |
7/31/11 | 12:00 | 167 | -5120.23 | Lifetime Position Characterization test |
7/31/11 | 15:50 | 175 | -5245.75 | Return to nominal value |
7/31/11 | 17:45 | 167 | -5120.23 | Lifetime Position Characterization test |
7/31/11 | 19:40 | 175 | -5245.75 | Return to nominal value |
8/1/11 | 13:40 | 167 | -5120.23 | Lifetime Position Characterization test |
8/1/11 | 19:12 | 175 | -5245.75 | Return to nominal value |
2/21/12 | 04:59 | 167 | -5120.75 | Aperture Verification / Spectrum Placement test (FENA2) |
2/21/12 | 06:43 | 175 | -5145.75 | Return to nominal value |
2/27/12 | 12:00 | 142 | -4727.98 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 12:20 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 12:40 | 153 | -4900.57 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 12:49 | 162 | -5041.78 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 13:04 | 168 | -5135.92 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 13:20 | 173 | -5198.68 | HV Sweep with wavecal at new lifetime position |
2/27/12 | 13:39 | 175 | -5245.75 | Return to nominal value |
2/28/12 | 03:29 | 151 | -4869.19 | HV Sweep with deuterium lamp at new lifetime position |
2/28/12 | 07:59 | 175 | -5245.75 | Return to nominal value |
3/12/12 | 03:00 | 167 | -5120.23 | Aperture Verification / Spectrum Placement test (FENA2) |
3/12/12 | 06:00 | 175 | -5245.75 | Return to nominal value |
3/19/12 | 00:00 | 142 | -4727.98 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 00:40 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 00:55 | 153 | -4900.57 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 01:10 | 158 | -4979.02 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 01:30 | 162 | -5041.78 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 02:00 | 175 | -5245.75 | Return to nominal value |
3/19/12 | 06:00 | 142 | -4727.98 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 06:15 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 07:00 | 153 | -4900.57 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 07:30 | 158 | -4979.02 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 08:00 | 162 | -5041.78 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 09:00 | 175 | -5245.75 | Return to nominal value |
3/19/12 | 18:10 | 142 | -4727.98 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 18:55 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 21:00 | 153 | -4900.57 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 21:20 | 158 | -4979.02 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 21:50 | 162 | -5041.78 | HV Sweep with wavecal at new lifetime position |
3/19/12 | 22:30 | 142 | -4727.98 | HV Sweep with deuterium lamp at new lifetime position |
3/20/12 | 04:15 | 147 | -4806.43 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 04:45 | 153 | -4900.57 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 05:30 | 158 | -4979.02 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 06:10 | 162 | -5041.78 | HV Sweep with wavecal at new lifetime position |
3/20/12 | 06:30 | 175 | -5245.75 | Return to nominal value |
3/22/12 | 20:00 | 153 | -4900.57 | HV Sweep with deuterium lamp at new lifetime position |
3/23/12 | 01:00 | 175 | -5245.75 | Return to nominal value |
3/25/12 | 00:00 | 159 | -5057.47 | HV Sweep with deuterium lamp at new lifetime position |
3/25/12 | 18:00 | 175 | -5245.75 | Return to nominal value |
4/16/12 | 00:00 | 163 | -5057.47 | Target ACQ testing at new lifetime position |
4/16/12 | 09:00 | 175 | -5245.75 | Return to nominal value |
5/24/12 | 00:00 | 100 | -4069.00 | HV Recovery - Day 1 |
5/25/12 | 00:00 | 151 | -4869.19 | HV Recovery Day 2 - QE grid off |
5/29/30 | 0:00 | 100 | -4069.00 | HV Recovery Day 3 - QE grid off |
5/30/12 | 00:00 | 157 | -4963.33 | HV Recovery Day 4 - QE grid off |
5/31/12 | 00:00 | 151 | -4869.19 | HV Recovery Day 5 - QE grid off |
6/1/12 | 00:00 | 163 | -5057.47 | HV Recovery Day 6 - QE grid off |
6/4/12 | 00:00 | 157 | -4963.33 | HV Recovery Day 7 - QE grid off |
6/5/12 | 00:00 | 169 | -5151.61 | HV Recovery Day 8 - QE grid off |
6/7/12 | 00:00 | 163 | -5057.47 | HV Recovery Day 9 - QE grid off |
6/8/12 | 00:00 | 175 | -5245.75 | HV Recovery Day 10 - QE grid off |
6/11/12 | 00:00 | 169 | -5151.61 | HV Recovery Day 11 - QE grid off |
6/12/12 | 00:00 | 175 | -5245.75 | HV Recovery Day 12 - QE grid off; back to HVNOM |
6/17/12 | 19:00 | 163 | -5057.47 | Target ACQ testing at new lifetime position |
6/19/12 | 02:00 | 175 | -5245.75 | Return to nominal value |
7/23/12 | 00:00 | 163 | -5057.47 | New nominal HV value of 163 at second lifetime position |
8/15/12 | 22:00 | 175 | -5245.75 | TDS old G130M/G140L target at old position |
8/16/12 | 01:00 | 163 | -5057.47 | Return to nominal values |
8/24/12 | 11:00 | 175 | -5245.75 | TDS old G160M target at old position |
8/25/12 | 09:00 | 142 | -4727.98 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 10:05 | 144 | -4759.36 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 10:15 | 153 | -4900.57 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 10:30 | 162 | -5041.78 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 10:45 | 168 | -5135.92 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 11:00 | 172 | -5198.68 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 03:00 | 153 | -4900.57 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 03:20 | 163 | -5057.47 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 03:30 | 168 | -5135.92 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 03:50 | 169 | -5151.61 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 04:00 | 172 | -5198.68 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 04:45 | 175 | -5245.75 | HV Sweep with wavecal at same postion as previous test |
8/25/12 | 18:30 | 144 | -4759.36 | HV Sweep with wavecal above the new lifetime position |
8/25/12 | 18:40 | 153 | -4900.57 | HV Sweep with wavecal above the new lifetime position |
8/25/12 | 19:00 | 163 | -5057.47 | HV Sweep with wavecal above the new lifetime position |
8/25/12 | 19:20 | 169 | -5151.61 | HV Sweep with wavecal above the new lifetime position |
8/25/12 | 20:00 | 172 | -5198.68 | HV Sweep with wavecal above the new lifetime position |
8/25/12 | 20:30 | 175 | -5245.75 | HV Sweep with wavecal above the new lifetime position |
8/25/12 | 21:00 | 163 | -5057.47 | Return to nominal values |
6/24/13 | 16:00 | 169 | -5151.61 | Changed HVNOM from 163 to 169 |
1/6/14 | 00:00 | 163 | -5057.47 | Characterization of gain at LP3 (LOP1) |
1/6/14 | 04:00 | 167 | -5120.23 | Characterization of gain at LP3 (LOP1) |
1/6/14 | 06:30 | 169 | -5151.61 | Return to nominal values |
1/30/14 | 16:00 | 163 | -5057.47 | Testing placement of spectra at LP3 (LOP2/13618) |
1/30/14 | 21:00 | 169 | -5151.61 | Return to nominal values |
2/4/14 | 9:00 | 167 | -5120.23 | Testing placement of spectra at LP3 |
2/4/14 | 14:50 | 169 | -5151.61 | Return to nominal values |
7/7/14 | 0:00 | 175 | -5245.75 | Testing new HV Management (LENA4/13637) |
7/7/14 | 11:57 | 163 | -5057.47 | Testing new HV Management (LENA4/13637) |
7/7/14 | 12:04 | 175 | -5245.75 | Testing new HV Management (LENA4/13637) |
7/7/14 | 12:32 | 163 | -5057.47 | Testing new HV Management (LENA4/13637) |
7/7/14 | 12:40 | 175 | -5245.75 | Testing new HV Management (LENA4/13637) |
7/7/14 | 13:08 | 163 | -5057.47 | Testing new HV Management (LENA4/13637) |
7/7/14 | 13:15 | 175 | -5245.75 | Testing new HV Management (LENA4/13637) |
7/7/14 | 14:00 | 169 | -5151.61 | Return to nominal values |
7/15/14 | 19:00 | 163 | -5057.47 | Focus run and aperture placement at LP3 (LENA2/13635, LENA1/13634) |
7/16/14 | 10:08 | 167 | -5120.23 | G130M/1222 focus run at LP3 (LENA2/13635) |
7/16/14 | 12:00 | 169 | -5151.61 | Return to nominal values |
7/21/14 | 0:00 | 175 | -5245.75 | Changed HVNOM from 169 to 175 |
9/8/14 | 17:26 | 163 | -5057.47 | G130M/1222 focus run at LP3 (LENA2/13635) |
9/8/14 | 19:00 | 175 | -5245.75 | Return to nominal values |
9/21/14 | 20:00 | 169 | -5151.61 | Additional visit of 13330 at previous Segment B HV value |
9/22/14 | 00:00 | 163 | -5057.47 | Cross-Dispersion Profiles, Flux, Flat Field at LP3 (LCAL3/13932) |
9/23/14 | 14:00 | 169 | -5151.61 | Additional visit of 13330 at previous Segment B HV value |
9/23/14 | 15:00 | 163 | -5057.47 | Cross-Dispersion Profiles, Flux, Flat Field at LP3 (LCAL3/13932) |
9/24/14 | 01:00 | 169 | -5151.61 | Additional visit of 13330 at previous Segment B HV value |
9/24/14 | 05:00 | 175 | -5245.75 | Return to nominal values |
9/24/14 | 07:30 | 163 | -5057.47 | Testing ACQs at LP3 (LENA3/13636) |
9/25/14 | 00:00 | 175 | -5245.75 | Return to nominal values |
2/9/15 | 167 | -5120.23 | Voltage for 1222 for the move to LP3 | |
2/9/15 | 163 | -5057.47 | Voltage for standard modes for the move to LP3 | |
1/18/16 | 169 | -5151.61 | Voltage increase due to gain sag for all modes at LP3 | |
10/17/16 | 175 | -5245.75 | Voltage increase due to gain sag for all modes at LP3 |