blog:20231119

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blog:20231119 [2023/11/19 16:29] – Roy Proutyblog:20231119 [2023/11/27 13:31] (current) – Roy Prouty
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 =====Time=====  =====Time===== 
-1515-+1515-2230
  
 =====Attendance===== =====Attendance=====
-Roy, Olivia+Roy, Olivia. Azzan
  
 =====Spaces Occupied===== =====Spaces Occupied=====
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 =====Frame Table===== =====Frame Table=====
  
-^ Time Observed ^ Source Name ^ Filter ^ Int Time [s] ^ Mag (filter) ^ RA [h] ^ DEC [deg] ^ Source Type ^Scope ^ Purpose ^ Notes^ DomeTemp [C] ^ +^ Time Observed ^ Source Name ^ Filter ^ Int Time [s] ^ Mag (filter) ^ RA [h] ^ DEC [deg] ^ Source Type ^Scope ^ Purpose ^ Notes^ DomeTemp [C] ^ Gain ^ 
-|  YYYYMMDDThhmm | (HD/NGC/ETC)   | UVBRI  | e.g., 3  | 1.25(V) | 20 | 45  | Star  | Main | Pointing |15.042 w/o ag| 14 |+|  20231119T1736| (Deneb) HD 197345  | I | 0.050  | 1.25 | 20.75 | 45  | Star  | Main | Pointing |15.011 w/o ag| 14 | 150 | 
 +|  20231119T1943| [[http://james.as.arizona.edu/~psmith/61inch/ATLAS/charts/c1.html|92 250]]  | B | 20x2.2 | 13.178(V) | 1 | 0.75  | Star Field | Main | Mag | AG-on, A:1.293 | 13 | 150 | 
 +|  20231119T1943| [[http://james.as.arizona.edu/~psmith/61inch/ATLAS/charts/c1.html|92 250]]  | V | 20x1.6 | 13.178(V) | 1 | 0.75  | Star Field | Main | Mag | AG-on, A:1.347 | 13 | 150 | 
 +|  20231119T1943| [[http://james.as.arizona.edu/~psmith/61inch/ATLAS/charts/c1.html|92 250]]  | R | 20x1.4 | 13.178(V) | 1 | 0.75  | Star Field | Main | Mag | AG-on, A:1.301 | 13 | 150 |
  
 +|  20231119T1943|  SA 20-340 | B | 20x2.8 | 8.95(V) | 1 | 46  |  Star Field | Main | Mag | AG-on, A:1.009 | 12 | 150 |
 +|  20231119T2128|  SA 20-340 | V | 20x2.0 | 8.95(V) | 1 | 46  |  Star Field | Main | Mag | AG-on, A:1.010 | 12 | 150 |
 +|  20231119T1943|  SA 20-340 | R | 20x1.9 | 8.95(V) | 1 | 46  |  Star Field | Main | Mag | AG-on, A:1.011 | 12 | 150 |
  
-^ Time Observed ^ Source Name ^ Filter ^ Int Time [s] ^ Mag (filter) ^ RA [h] ^ DEC [deg] ^ Source Type ^Scope ^ Purpose ^ Notes^ DomeTemp [C] ^ +|  20231119T1703| FLAT   | B| 0.21s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
-|  20231119T1625| FLAT   | U| 0.08s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 |+|  20231119T1703| FLAT   | V| 0.21s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
 +|  20231119T1703| FLAT   | R| 0.10s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
 +|  20231119T1703| FLAT   | I| 0.11s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
 + 
 +|  20231119T1625| DARK   | -| 2.2s | - | - | -  | DARK  | Main | Calibration |--| 14 | 150 | 
 +|  20231119T1625| DARK   | -| 1.6s | - | - | -  | DARK  | Main | Calibration |--| 14 | 150 | 
 +|  20231119T1625| DARK   | -| 1.4s | - | - | -  | DARK  | Main | Calibration |--| 14 | 150 | 
 +|  20231119T1625| DARK   | -| 2.8s | - | - | -  | DARK  | Main | Calibration |--| 14 | 150 | 
 +|  20231119T1625| DARK   | -| 2.0s | - | - | -  | DARK  | Main | Calibration |--| 14 | 150 | 
 +|  20231119T1625| DARK   | -| 1.0s | - | - | -  | DARK  | Main | Calibration |--| 14 | 150 | 
 + 
 +|  20231119T1703| DARK   | B| 8.53s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
 +|  20231119T1703| DARK   | V| 3.39s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
 +|  20231119T1703| DARK   | R| 3.0s | - | - | -  | FLAT  | Main | Calibration | Used NINA| 14 | 0| 
 + 
 +|  20231119T1703| BIAS | - | 0.032ms | - | - | -  | FLAT  | Main | Calibration | | 14 | 0| 
 +|  20231119T1703| BIAS | - | 0.032ms | - | - | -  | FLAT  | Main | Calibration | | 14 | 150|
  
  
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   - Choosing not to North-align to favor collection of sky flats   - Choosing not to North-align to favor collection of sky flats
   - Set focus to 1907.4, which was the optimal focus arrived at on 20231117   - Set focus to 1907.4, which was the optimal focus arrived at on 20231117
-  -  +  - Took flats while sun was setting, had to move towards west because of moving object in frames 
 +  - Pointed on Deneb -- out of focus! 
 +      - The decision was made to get us in focus -- which would ruin flats from earlier. 
 +      - SO. We will focus anyway, then north-align, then take dome flats at the end of the night. But only in BVRI because the dome is a bad ultra-violet radiator. COOL 
 +  - Deneb is too bright to focus on. But good for pointing :) 
 +  - Pointed at HD 200905, **OPTIMAL FOCUS IS 1913.6** 
 +  - Set Thor Inst Rotator to 85 deg for north-alignment 
 +  - Found two nice resources (see notes) for star fields with photometry 
 +  - Identified field [[http://james.as.arizona.edu/~psmith/61inch/ATLAS/charts/c1.html|92 250, near equator]] 
 +  - FOR 92-250 
 +  - In B, skyBrightness of 9.76 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 13, HFD 6.65, 4.37" 
 +  - In V, skyBrightness of 13.61 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 13, HFD 6.565 4.7" 
 +  - In R, skyBrightness of 14.91 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 13, HFD 6.75, 4.57"  
 +  - In I, skyBrightness of 3.40 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 13, HFD 6.65, 4.44" 
 +  - MOVED TO SA 20-340, from lamdolt paper 
 +  - In B, skyBrightness of 7.63 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 12, HFD 6.04, 4.27" 
 +  - In V, skyBrightness of 10.56 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 12, HFD 6.05 4.22" 
 +  - In R, skyBrightness of 11.34 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 12, HFD 6.20, 4.03"  
 +  - In I, skyBrightness of 2.45 e-/pix/s, actual gain of 4.44 e/ADU, dome temp 12, HFD 6.00, 4.46" 
 +  - Moved to taking flats 
 +  - Moved to taking darks 
 +  - Moved to taking biases
  
 =====ToDo===== =====ToDo=====
 +Pls schedule good weather more spread out, thx.
  
 =====Notes===== =====Notes=====
 +  - [[http://james.as.arizona.edu/~psmith/61inch/ATLAS/tableA.html| Main Index of Equatorial UBVRI Photometric Standard Stars]]
 +  - [[https://iopscience.iop.org/article/10.1088/0004-6256/146/5/131/pdf| U BV RI PHOTOMETRIC STANDARD STARS AROUND THE SKY AT +50 deg DECLINATION]]
 +  - Optimal black level is just brightness -_-
 +
 +HOW TO TAKE STARFIELD LGIHT FRAMES:
 +  1: find field
 +  2: match to finder chart best as possible, use vertical/horizontal flips as nesscary
 +  3: in sharpcap, go to tools>histrogram>brain icon
 +  4: select ignore edges, minimum exposure 0.5s, max 2m, read noise limit 50%, total stacking time 5m,  aim for max dynamic raneg
 +  5: select measure (may take a minute or two to optimize)
 +  6: apply settings
 +  7: MAKRE SURE GUIDNING IS on
 +  8: go to start capture, set reasonable name with filter name, 20 frames, start
 +  9: record sky brightness, optimal gain, actual gain, exposure time, dome temp from acurite monitor, airmass, HFD from PHD2(big number and smaller),
 +  10:Populate chart in blog :)
  
 =====Weather===== =====Weather=====