In this section we will discuss the status of the HET facility and each instrument and any limitation to configurations that occurred during the period.
Commissioning and Engineering Report There were 159 hours granted for engineering in the 19-2 period:
There were 157 hours of engineering attempted but some of the time was rejected for weather or other issues used in the 19-2 period. The following were some of the categories of engineering that were successful:
Month by Month Summary
The following table gives the observing statistics for each month. The second column gives the fraction of the month that was spent attempting science (as opposed to engineering or instrument commissioning). Science time is defined to begin at 18 degree twilight. Science time is defined to end at 18 degree twilight. The third column gives the fraction of the possible science time (A) lost due to weather. The sixth through eighth columns give the amount of remaining science time (after removing weather losses) not spent attempting science targets. Please note that the first stack of the night often occurs before 18 degree twilight.
| Month | A:Fraction of the Time that was Possible Science | C:Fraction of Total Time Lost due to Weather | D:Fraction of Actual Science Time Spent with Shutter Open | D:Fraction of Actual Science Time Lost due to Overhead | D:Fraction of Actual Science Time Lost due to Alignment | F:Fraction of Actual Science Time Lost due to Problems | Fraction of Actual Science Time Not accounted for or Lost |
|---|---|---|---|---|---|---|---|
| Apr | 0.894 | 0.322 | 0.644 | 0.230 | 0.057 | 0.064 | 0.006 |
| May | 0.835 | 0.366 | 0.669 | 0.215 | 0.046 | 0.069 | 0.001 |
| Jun | 0.850 | 0.444 | 0.649 | 0.270 | 0.061 | 0.010 | 0.011 |
| Jul | 0.746 | 0.364 | 0.592 | 0.387 | 0.011 | 0.005 | 0.006 |
The following tables give a break down of all attempted science visits as well as the category that each falls into.
| Charged exposures | ||
|---|---|---|
| Number of Times | Shutter Open (Hours) | Type |
| 2345 | 319.85 | A - Acceptable |
| 134 | 26.77 | B - Acceptable but Border line conditions |
| 293 | 48.37 | 4 - Priority 4 visits (does not include 1/2 charge) |
| 1 | 0.30 | Q - charged but PI error |
| 0 | 0.0 | C - Acceptable by RA but PI rejects |
| Uncharged exposures caught by RA | ||
|---|---|---|
| Number of Times | Shutter Open (Hours) | Type |
| 1 | 0.10 | N - Rejected due to unknown cause |
| 32 | 5.32 | E - Rejected for Equipment Failure |
| 161 | 26.90 | W - Rejected for Weather |
| 13 | 1.75 | H - Rejected for Human failure |
| Uncharged exposures caught by PI | ||
|---|---|---|
| Number of Times | Shutter Open (Hours) | Type |
| 4 | 0.82 | P - Rejected for weather |
| 0 | 0.0 | F - Rejected for Equipment Failure |
| 0 | 0.0 | T - Rejected for poor track choice |
| 0 | 0.0 | X - Rejected for Human failure |
| Acceptable but Uncharged exposures | ||
|---|---|---|
| Number of Times | Shutter Open (Hours) | Type |
| 0 | 0.00 | I - Targets observed under otherwise idle conditions |
The following setup statistics include slew, acquisition, and starting data collection script. The table below gives the average setup time for each instrument PER ACTUAL VISIT and the average and maximum COMPLETED charged science exposures and visits.
The "Exposure" is defined by when the CCD opens and closes. A "Visit" is the requested total CCD shutter open time during a track and might be made up of several "Exposures". "Visit" as defined here contains no overhead. To calculate one type of observing efficiency metric one might divide the "Visit" by the sum of "Visit" + "Overhead".
The average setup per visit is calculated from acceptable priority 0-3 (not borderline) science targets. This number reflects how quickly we can move from object to object on average for each instrument, however, this statistic tends to weight the setup for programs with large number of targets.
| Instrument | Avg Setup per Visit(min) | Median Completed Exposure (sec) | Max Completed Exposure (sec) | Avg Completed Visit (sec) | Max Completed Visit (sec) |
|---|---|---|---|---|---|
| VIRUS | 2.81 | 369 | 900 | 1038 | 2700 |
| LRS2 | 5.17 | 758 | 1980 | 1039 | 3300 |
| HPF | 6.85 | 497.9 | 969.1 | 1556 | 5400 |
The setup statistics can be shortened by multiple setups (each one counted as a separate visit) while on the same target such as moving from LRS2-B to LRS2-R.
| Institution | Total Open | Total OH | Total Charged | Total TAC | Total % | P0 Completion | P1 Completion | P2 Completion | P3 Completion |
|---|---|---|---|---|---|---|---|---|---|
| G19-2-001 | 0.00 | 0.00 | 0.00 | 0.54 | 0.00% | 100.00% | |||
| G19-2-002 | 0.65 | 0.30 | 0.95 | 1.08 | 87.96% | 100.00% | 100.00% | ||
| M19-2-001 | 2.25 | 0.35 | 2.60 | 2.75 | 94.55% | 100.00% | 100.00% | ||
| M19-2-002 | 0.83 | 0.23 | 1.07 | 1.00 | 100.00% | 100.00% | |||
| M19-2-004 | 0.00 | 0.00 | 0.00 | 7.60 | 0.00% | program submitted in June | program submitted in June | ||
| PSU19-2-001 | 3.73 | 1.05 | 4.78 | 2.92 | 100.00% | 100.00% | 100.00% | ||
| PSU19-2-002 | 1.80 | 0.79 | 2.59 | 2.47 | 100.00% | 100.00% | 100.00% | 100.00% | |
| PSU19-2-003 | 1.07 | 0.48 | 1.55 | 3.41 | 45.45% | 33.33% | 100.00% | ||
| PSU19-2-004 | 1.95 | 0.72 | 2.67 | 5.61 | 47.70% | 87.5% | |||
| PSU19-2-005 | 0.33 | 0.00 | 0.33 | 0.54 | 61.50% | ||||
| PSU19-2-006 | 0.51 | 0.30 | 0.81 | 0.75 | 100.00% | 100.00% | |||
| PSU19-2-007 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00% | ||||
| PSU19-2-008 | 22.72 | 6.16 | 28.88 | 30.00 | 96.28% | 66.67% | 100.00% | 100.00% | 100.00% |
| PSU19-2-009 | 0.30 | 0.12 | 0.42 | 1.00 | 41.67% | 100.00% | 0.00% | ||
| UT19-2-001 | 9.50 | 2.04 | 11.55 | 13.00 | 88.81% | 78.33% | 74.17% | 87.33% | |
| UT19-2-003 | 1.83 | 1.25 | 3.08 | 9.60 | 32.12% | 91.67% | 100.00% | 37.25% | |
| UT19-2-004 | 1.40 | 0.00 | 1.40 | 2.00 | 70.19% | ||||
| UT19-2-005 | 6.77 | 4.56 | 11.33 | 10.00 | 100.00% | 100.00% | |||
| UT19-2-008 | 0.79 | 0.21 | 1.00 | 3.00 | 33.22% | 49.83% | |||
| UT19-2-009 | 5.91 | 1.37 | 7.28 | 7.60 | 95.76% | 100.00% | 100.00% | ||
| UT19-2-010 | 7.10 | 4.43 | 11.53 | 17.10 | 67.42% | 97.03% | |||
| UT19-2-011 | 5.25 | 1.40 | 6.65 | 6.70 | 99.25% | 100.00% | 94.31% | ||
| UT19-2-012 | 8.70 | 1.63 | 10.33 | 16.50 | 62.59% | 100.00% | 97.78% | 11.02% | |
| UT19-2-013 | 5.12 | 1.72 | 6.83 | 14.40 | 47.45% | 100.00% | 100.00% | ||
| UT19-2-014 | 12.90 | 4.53 | 17.43 | 40.90 | 42.62% | 100.00% | 86.76% | 50.00% | |
| UT19-2-015 | 7.88 | 1.89 | 9.77 | 20.70 | 47.21% | 100.00% | 75.00% | 100.00% | 42.64% |
| UT19-2-016 | 0.26 | 0.12 | 0.37 | 2.00 | 18.72% | 20.00% | |||
| UT19-2-017 | 4.50 | 1.55 | 6.05 | 13.05 | 46.36% | 100.00% | 100.00% | ||
| UT19-2-018 | 0.23 | 0.00 | 0.23 | 20.00 | 1.13% | ||||
| UT19-2-019 | 1.50 | 0.30 | 1.80 | 2.00 | 90.00% | 100.00% | |||
| HET19-2-100 | 118.50 | 36.62 | 155.12 | 170.00 | 91.25% | 91.25% | |||
| HET19-2-201 | 3.17 | 0.57 | 3.73 | 4.00 | 93.33% | 100.00% | 100.00% | 100.00% | |
| HET19-2-300 | 16.65 | 4.15 | 20.80 | 20.00 | 100.00% | 100.00% | 100.00% | 100.00% | |
| HET19-2-400 | 3.28 | 1.92 | 5.20 | 19.50 | 26.65% | 100.00% | |||
| Program Completion Rates | |||
|---|---|---|---|
| Priority | Average Completion | Median Completion | |
| P0 | 96.4% | 100.0% | |
| P1 | 89.1% | 100.0% | |
| P2 | 91.0% | 100.0% | |
| P3 | 72.0% | 87.5% | |
Below we show how the TAC allocations were determined.
Institution Status
| Breakdown of how TAC hours were determined | |||||
|---|---|---|---|---|---|
| Parameter | April | May | June | July | Total |
| 18 Degree Twilight Hours | 248.53 | 225.84 | 202.29 | 218.09 | 894.75 |
| Engineering Hours | 8.30 | 14.59 | 6.71 | 6.99 | 36.59 |
| Operational Hours | 240.23 | 211.25 | 195.58 | 211.11 | 858.16 |
| Observable Fraction | 0.65 | 0.65 | 0.65 | 0.65 | |
| Clear Science Hours | 156.15 | 137.31 | 127.13 | 137.22 | 557.81 |
| Telescope Efficiency | 0.90 | 0.90 | 0.90 | 0.90 | |
| Actual Science Hours | 140.53 | 123.58 | 114.41 | 123.50 | 502.02 |
| Instrument Eng/GTO Hours | 90.00 | 80.00 | 69.00 | 70.00 | 309.00 |
| Allocatable Hours | 50.53 | 43.58 | 45.41 | 53.50 | 193.02 |
| -- | |||||
| Partner | Fractional Share | Notes | Total Hours | ||
| Goettingen | 0.0084 | 1.62 | |||
| Munchen | 0.0590 | 11.39 | |||
| Penn State | 0.2568 | Time trade = 49.57 - 4.75 | 44.82 | ||
| Texas | 0.6757 | Time trade = 130.43 + 4.75 | 135.18 | ||
TAC time should be allocate with up to 8.3% allocated to P0, 25% allocated to P1, 33.3% allocated to P2 and 33.3% allocated to P3. P4 allocations are not restricted. GTO and engineering time are assigned by the HET board and not from this formula.
This is how each institution has allocated its time by priority.
| Time Allocation by Institution (hours) | |||||
|---|---|---|---|---|---|
| Institution | Priority 0 | Priority 1 | Priority 2 | Priority 3 | Priority 4 |
| PSU | 5.50 | 9.92 | 13.67 | 13.74 | 4.37 |
| UT | 10.60 | 32.30 | 40.00 | 43.65 | 75.00 |
| Munich | 0.95 | 2.80 | 3.80 | 3.80 | 0.00 |
| Goetting | 0.00 | 0.54 | 0.54 | 0.54 | 0.00 |
| Other allocations | |||||
| GTO | 194.50 | 9.00 | 10.00 | 0.00 | 0.00 |
The following is a summary of the total charged time for each institution based on our htopx data base (for shutter open) and night reports (for overhead). It includes shutter open time (weighting priority four by half) and overhead.
As requested by the board the time accounting has started over starting Fiscal year 2011-2012.
| Time Charged by Institution (hours) | |||||
|---|---|---|---|---|---|
| -INST- | Used THIS PERIOD | % of All THIS PERIOD | -TOTAL TO DATE- | -% TO DATE- | - % ALLOCATION TO DATE- |
| PSU | 42.05 | 27.3% | 1288.84 | 28.5% | 24.03% |
| UT | 107.13 | 69.7% | 2826.60 | 62.6% | 67.29% |
| Munich | 3.67 | 2.4% | 222.00 | 4.9% | 5.49% |
| Goetting | 0.95 | 0.6% | 177.72 | 3.9% | 3.19% |
Below are the summaries of the GTO time granted by the Board:
| GTO and Special Time Charged by Project (hours) | |||||
|---|---|---|---|---|---|
| -Project- | Allocated THIS PERIOD | Allocated TO DATE | Used THIS PERIOD | -TOTAL TO DATE- | |
| HETDEX (HETYY-P-100) | 170.0 | 1089.0 | 155.12 | 667.10 | |
| LRS2 (HETYY-P-2XX) | 15.0 | 121.94 | 3.73 | 55.04 | |
| HPF (HETYY-P-3XX) | 20.0 | 60.0 | 20.80 | 61.31 | |
| GW (HETYY-P-400) | 19.5 | 19.5 | 5.20 | 5.20 | |
Total to Date starting from the 11-2 period.