Light variations of alpha Cygni variables in the Magellanic Clouds

A. M. van Genderen, A. Jones and C. Sterken

We present time-series monitoring of 19 Magellanic Cloud super- and hypergiants, of which 6 turned out to be constant, and 13 are alpha Cygni variables, viz.: S18 = AzV154, HDE268835 = R66, HD37974 = R126, HDE268757 = R59, HDE268822 = GV505, HDE269355 = GV258, HDE269612 = GV322, HDE270025 = GV439, AzV121, HD5277 = AzV136 = R10, AzV197, AzV310 = R26, and AzV369; the LMC stars HD32034 = GV80 = R62, HDE268819 = GV91, HDE269661 = GV346 = R111, HDE269697 = GV352, HDE269953 = GV423 = R150 and HDE270111 = GV460.

 Table  Description
 R59AFJ  Visual magnitude estimates of R59
 R66AFJ  Visual magnitude estimates of R66
 R126AFJ  Visual magnitude estimates of R126
 R66UVBY  uvby photometry of R66 in the instrumental system
 S18  Table 5: Walraven photometry of S18
 HD37974  Table 6: Walraven photometry of HD37974 = R126
 HD268835  Table 7: Walraven photometry of HDE268835 = R66
 HD268757  Table 8: Walraven photometry of HDE268757 = R59
 HD269612  Table 9: Walraven photometry of HDE269612 = GV322
 HD268822  Table 10: Walraven photometry of HDE268822 = GV505
 AZV369  Table 11: Walraven photometry of AzV369
 G91  Table 12A: Walraven V photometry of G91
 G352  Table 12B: Walraven V photometry of G352
 G423  Table 12C: Walraven V photometry of G423
 HD270111  Table 13: Walraven photometry of HDE270111 = G460
 G80  Table 14A: Walraven V photometry of G80
 G346  Table 14B: Walraven V photometry of G346