ROTSE1 stars in the July 2002 Mark IV dataset

Patrick Wils
July 30, 2002

The TASS July data set contains observations of variables found in the ROTSE survey (the first 3 columns are from TASS): 

  N   V    V-Ic ROTSE1               Mag   Ampl  Type Per. Rem
  6 11.94  0.47 J162933.95+083800.1 12.28 (0.247) rrc 0.267 
 91 11.58  0.65 J163215.89+074927.3 11.84 (0.186) ds  0.173  1 
  6 12.96  0.86 J163229.27+081803.4 12.91 (0.309) ew  0.400 
 43 11.81  1.42 J163800.48+082622.9 12.27 (1.056) m          2
  1 13.48  2.55 J163910.78+080125.7 11.78 (0.304) c  84.456  3
 10 11.97  1.82 J163945.40+091637.2 11.82 (1.126) m          4
 78 11.68  2.10 J164406.52+080731.8 10.58 (1.405) m          5
  4 12.58  3.05 J164428.28+091941.2 10.49 (0.516) c 100.259  6
 28 11.79  0.92 J164501.33+084831.3 11.74 (0.769) e   3.179  7
 29 12.67  0.94 J164502.61+080034.6 12.63 (0.225) c   1.034  8
  2 11.54  0.96 J164703.37+094601.4 11.36 (0.229) c   4.590 
 56 11.70  0.67 J164852.15+081907.6 11.73 (0.393) ew  0.401  9
107 10.86  0.49 J165023.32+075108.1 11.16 (0.360) rrc 0.293  9
 99 11.30  3.89 J165124.98+081853.8 10.37 (1.236) m         10
  3 12.64  3.05 J171015.52+082502.8 11.14 (0.376) lpv 
 36 11.87  1.86 J171547.91+081722.0 11.06 (0.211) lpv       11
 11 12.66  3.66 J171708.50+083929.5 10.65 (0.277) lpv       11
 26 12.15  1.16 J171711.85+081521.4 11.94 (0.223) c   3.140  2
  2 13.40  2.84 J171806.51+090802.1 12.08 (0.502) lpv       12
  4 11.19  2.53 J171904.36+082951.3 10.31 (1.988) m         13
 36 11.44  0.71 J172836.98+082804.2 11.67 (0.235) rrc 0.227 14

Remarks:

  1. TASS observations on 2 nights are compatible with the type and period (may be a bit red for a Delta Scuti though).
  2. TASS has observations on one night only, without evident variation
  3. The single TASS observation's color excludes a Cepheid variable. This star was observed by ROTSE for a timespan of 73 days only, so there is no real support for the 84-day period.
  4. = NSV 7891 (LB: 14.-14.5P). TASS has observations on two nights separated by 70 days, with an average difference of 0.4 in V and 0.6 in I, confirming long period variability.
  5. = V548 Her (M: 12.5-17.2P). TASS has observations on 3 nights, with means: JD426 V=12.01 I=9.25, JD435 V=11.71 I=9.60, JD441 V=11.56 I=9.69, showing an odd rise in V and a fade in Ic.
  6. = IRAS 16420+0925. Again the TASS color seems to exclude a Cepheid variable. Same remark as above for the ROTSE period.
  7. = V651 Her (DCEP: 13.-14.P). No clear variation in TASS data (2 nights).
  8. No clear variation in TASS data (3 nights).
  9. TASS observations on 3 nights are compatible with the type and period.
  10. = NSV 8001 (13.-<16.P). Discussed before by John G.
  11. TASS observations on one night only
  12. = NSV 8484 (SR 14.1-15.0P)
  13. = V744 Oph (M 12.4-<16.6P P=267.3d)
  14. TASS has most observations on one night, with only a single observation a second night. The variation observed seems to be much faster than what may be expected for an rrc of this period.