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1. Explanation
Cataclysmic variables (CVs) are close binary star systems in which a white dwarf accretes mass from a low-mass companion via Roche-lobe overflow. Warner (1995) presents a comprehensive review.
The most significant observable number for a CV is its orbital period Porb. We report here CV orbital periods measured over the last several decades using the Hiltner 2.4 m and McGraw-Hill 1.3 m telescopes at MDM Observatory on Kitt Peak, Arizona, mostly with radial-velocity spectroscopy. While most of our results have been published in peer-reviewed articles (see, e.g., Thorstensen et al. 2010, 2015, 2016; Thorstensen & Skinner 2012), many periods we have determined remain unpublished.
To make our CV periods available more quickly, and prevent duplication of effort, we present in Table 1 some of our heretofore unpublished Porbs, some of which are refinements of previously known periods. The instrumentation, observing protocols, reduction, and analysis are described in the papers cited above. We are confident of the choices of cycle count between observations.
Table 1. New or Improved Orbital Periods
| Name | α2000 | δ2000 | P | T0a | Methodb |
|---|---|---|---|---|---|
| (h m s) | (° ' '') | (days) | |||
| ASAS-SN 16lu | 00 24 37.16 | +11 06 11.2 | 0.3302(1) | ⋯ | abs, emn |
| FL Psc | 00 25 11.09 | +12 17 12.3 | 0.0560(1) | ⋯ | emn |
| 1RXS J012750.5+380830 | 01 27 50.60 | +38 08 12.0 | 0.06071(5) | ⋯ | emn |
| RX J0153.3+7446 | 01 53 20.94 | +74 46 21.7 | 0.16415(1) | ⋯ | emn |
| WY Tri | 02 25 00.47 | +32 59 55.8 | 0.07569(7) | ⋯ | emn |
| BB Ari | 02 44 57.78 | +27 31 09.2 | 0.0702(1) | ⋯ | emn |
| CSS071108:030945+295251 | 03 09 45.19 | +29 52 50.9 | 0.08468(3) | ⋯ | ecl, emn |
| SDSSJ032015.29+441059.3 | 03 20 15.29 | +44 10 59.3 | 0.0687(12) | ⋯ | emn |
| V1294 Tau | 04 00 37.25 | +06 22 46.2 | 0.1490188(2) | 53017.792(4) | emn |
| V1024 Per | 04 02 39.02 | +42 50 46.0 | 0.0706(3) | ⋯ | emn |
| V1389 Tau | 04 06 59.78 | +00 52 44.3 | 0.07815(6) | ⋯ | emn |
| ASAS-SN 16pm | 04 17 24.77 | +22 15 22.8 | 0.1540(2) | ⋯ | emn |
| FY Per | 04 41 56.58 | +50 42 36.2 | 0.2584(3) | ⋯ | emn |
| V1208 Tau | 04 59 44.03 | +19 26 22.9 | 0.0681(2) | ⋯ | emn |
| V1193 Ori | 05 16 26.65 | −00 12 14.2 | 0.1657(3) | ⋯ | emn |
| Paloma | 05 24 30.52 | +42 44 50.4 | 0.1092(3) | ⋯ | emn |
| 1RXS J055722.9+683219 | 05 57 18.47 | +68 32 27.0 | 0.0523(3) | ⋯ | emn |
| V405 Aur | 05 57 59.29 | +53 53 44.9 | 0.1726255(3) | 51838.048(5) | emn |
| LS Cam | 05 57 23.96 | +72 41 52.4 | 0.1423853(5) | 53743.942(4) | emn |
| ASAS-SN 15ex | 07 20 54.19 | +34 12 45.3 | 0.16581(2) | ⋯ | abs |
| ASAS-SN 15tc | 07 56 00.68 | −02 51 12.3 | 0.1651(4) | ⋯ | emn |
| SBSS 0755+600 | 07 59 26.39 | +59 53 51.1 | 0.07334(8) | ⋯ | emn |
| HZ Pup | 08 03 22.80 | −28 28 28.8 | 0.212(1) | ⋯ | emn |
| SU UMa | 08 12 28.2 | +62 36 22.6 | 0.07637540(8) | 50839.911(3) | emn |
| ASAS-SN 16as | 09 14 10.75 | +01 37 32.9 | 0.2518(3) | ⋯ | emn, abs |
| RW Sex | 10 19 56.62 | −08 41 56.0 | 0.2451450(6) | 52233.922(4) | emn |
| LY UMa | 10 48 17.98 | +52 18 30.0 | 0.2712788(2) | 51994.741(1) | abs |
| QZ Vir | 11 38 26.96 | +03 22 08.1 | 0.05882047(7) | 53448.827(2) | emn |
| SDSS J134441.8+204408 | 13 44 41.83 | +20 44 08.3 | 0.070592(4) | ⋯ | emn |
| TT Boo | 14 57 44.76 | +40 43 40.8 | 0.075940(3) | ⋯ | emn |
| QZ Lib | 15 36 16.00 | −08 39 07.6 | 0.06413(8) | ⋯ | emn |
| SDSS J154453.6+255348 | 15 44 53.6 | +25 53 48.8 | 0.25128168(2) | 54658.6372(2) | ecl |
| CSS170517:155156+145333 | 15 51 55.62 | +14 53 32.9 | 0.0697(2) | ⋯ | emn |
| QZ Ser | 15 56 54.46 | +21 07 19.8 | 0.08316078(7) | 52438.8144(4) | abs |
| SDSS J155720.75+180720.2 | 15 57 20.75 | +18 07 20.2 | 0.0810(3) | ⋯ | emn |
| CSS160906:160346+193540 | 16 03 46.08 | +19 35 39.9 | 0.05693(2) | ⋯ | emn |
| ASAS-SN 15kw | 17 19 37.10 | +04 31 23.8 | 0.0592(2) | ⋯ | emn |
| V380 Oph | 17 50 13.66 | +06 05 29.1 | 0.1534766(4) | 53549.845(4) | emn |
| IX Dra | 18 12 31.43 | +67 04 46.1 | 0.0648(2) | ⋯ | emn |
| V868 Cyg | 19 29 04.41 | +28 54 25.4 | 0.1698(15) | ⋯ | emn |
| 1RXS J192926.6+202038 | 19 29 27.82 | +20 20 35.4 | 0.162(1) | ⋯ | emn |
| V2289 Cyg | 19 34 36.14 | +51 07 40.8 | 0.142(2) | ⋯ | emn |
| RX J1946.2-0444 | 19 46 16.36 | −04 44 56.8 | 0.07462(7) | ⋯ | emn |
| UU Aql | 19 57 18.68 | −09 19 20.8 | 0.1635324(3) | 48722.951(4) | emn |
| V2306 Cyg | 19 58 14.50 | +32 32 41.9 | 0.1821454(8) | 53622.783(6) | emn |
| V1316 Cyg | 20 12 13.65 | +42 45 51.1 | 0.07412(15) | ⋯ | emn |
| TW Vul | 20 39 34.48 | +27 15 55.6 | 0.1591(6) | ⋯ | emn |
| SDSS J204314.02+153602.0 | 20 43 14.02 | +15 36 02.1 | 0.1515(3) | ⋯ | emn |
| ASAS-SN 15rz | 20 53 05.42 | +59 17 31.8 | 0.208(1) | ⋯ | emn |
| V1060 Cyg | 21 07 42.20 | +37 14 08.7 | 0.292(2) | ⋯ | emn, abs |
| V444 Peg | 21 37 01.83 | +07 14 45.9 | 0.0926(2) | ⋯ | emn |
| KM Lac | 22 13 49.30 | +55 28 27.0 | 0.21542426(2) | 57550.9018(7) | ecl |
| V368 Peg | 22 58 43.48 | +11 09 11.9 | 0.0685(3) | ⋯ | emn |
| V405 Peg | 23 09 49.17 | +21 35 17.7 | 0.1776464(2) | 53182.019(2) | abs |
| EI Psc | 23 29 54.30 | +06 28 10.9 | 0.044566904(6) | 52670.5745(2) | abs |
| NSV14652 | 23 38 48.70 | +28 19 55.5 | 0.07824(9) | ⋯ | emn |
| ASAS-SN 15nv | 23 42 26.24 | +32 48 20.6 | 0.1348254(12) | 58040.6917(3) | ecl |
| V630 Cas | 23 48 51.91 | +51 27 39.3 | 2.56388(2) | 50709.76(2) | abs |
Notes.
aBarycentric Julian date, minus 2,400,000., of either (a) the blue-to-red crossing through the mean velocity or (b) mid-eclipse, given only when the period is accurate enough to predict phase in the present epoch. The time system is UTC. bMeasurements used for period finding; "em" and "abs" denote emission- and absorption-line radial velocity; "ecl" denotes eclipses.For references on these stars, see SIMBAD and the online lists maintained by ASAS-SN, the Catalina surveys, and MASTER. Downes et al. (2001) give references for long-known CVs (see also Downes et al. 2005).