Spreadsheet for reducing BVI data (Change Log)
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Spreadsheet for reducing BV extinction data via the Hardie method
Spreadsheet for reducing RI data (Change Log)
List of target, comparison, and check stars for PEP-V observations
Click here to obtain a comma-separated (.csv) list of PEP target, comparison, and check stars. This file evolves over time. The current version is as of October 21, 2023. A "Change Log" can be found here.
The format of the lines is as follows:
Field 1: abbreviation of variable star (eg: ALF SCO, NSV 6687, V368 HER)
2: modern AAVSO designation
3: old AAVSO designation
4-6: variable RA hh,mm,ss
7-9: variable Dec dd,mm,ss
10: variable spectral type
11: variable V magnitude
12: variable B-V
13: comparison star ID
14-16: comparison RA hh,mm,ss
17-19: comparison Dec dd,mm,ss
20: comparison V magnitude
21: comparison B-V
22: check star ID
23-25: check RA hh,mm,ss
26-28: check Dec dd,mm,ss
29: check V magnitude
30: delta (B-V) of variable and comparison
The list is given in order of Right Ascension. Comparison and check stars are always identified by HR, HD, or SAO numbers. Variables are occasionally identified this way. In an ASCII file like this, ambiguity can arise for stars with Bayer designations MU or NU, since these are also Greek letters. The Greek designations, when intended, are here given as MIU and NIU. Some stars have synonym abbreviations, and so appear twice in the list.
PEP Test Stars
Over the years, some stars in the AAVSO database proved not to be variable. These "constant" stars are no longer of interest, astrophysically speaking, but they are convenient targets to check the quality of your photometry. Thirteen northern stars are listed below (southern "constants" are harder to come by). All are in the master list of PEP targets. Since these stars are still in the AAVSO system, you can submit and examine data for them. The greater the B-V difference, the more strongly the calibration of your system will be challenged.
| Star* | V | Comparison | V | delta(B-V) | Check |
|---|---|---|---|---|---|
| alf Cas | 2.225 | HD 5395 | 4.629 | 0.212 | HD 9927 |
| RU Cas | 5.558 | HD 6960 | 5.551 | -0.025 | HD 5015 |
| RR Ari | 5.75 | HD 13174 | 4.989 | 0.853 | HD 13363 |
| NSV 16300 (Ori) | 5.695 | HD 34658 | 5.34 | -0.626 | HD 36134 |
| niu Aur | 3.96 | HD 38656 | 4.51 | 0.182 | HD 41357 |
| 1 Gem | 4.158 | HD 38751 | 4.877 | -0.192 | HD 43039 |
| NSV 2877 (Aur) | 4.338 | HD 40588 | 6.19 | 0.939 | HD 42471 |
| SY UMa | 5.28 | HD 82328 | 3.175 | -0.392 | HD 82621 |
| alf Com | 4.318 | SAO 82650 | 5.99 | 0.064 | SAO 82692 |
| NSV 6687 (UMi) | 4.275 | HD 136726 | 5.013 | 0.065 | HD 142105 |
| VW Dra | 6.319 | SAO 17360 | 6.7 | 0.494 | SAO 17312 |
| NSV 24912 (Aql) | 5.118 | HD 185018 | 5.978 | -0.33 | HD 188310 |
| 51 Peg | 5.467 | HD 218235 | 6.157 | 0.215 | HD 215510 |
* These are the PEP designations. NSV 16300 is HD 35299, NSV 2877 is HD 43039, NSV 6877 is HD 127700, NSV 24912 is HD 187691, and niu Aur is the PEP id for η Aur (HD 39003).