[vsnet-alert 1822] Re: V2051 Oph - improved eclipse timings

[Taichi Kato <tkato>]

Sonja Vrielmann wrote:

> the eclipse timings you distributed are too early by about 5 min. You
> probably have taken the parabolic ephemeris of Echevarria & Alvarez (1993)
> which don't fit over the years. The eclipses seem better calculated with
> their linear ephemeris:
> 
> HJD(eclipse) =  2444043.680190 + 0.0624278870 * E

  We actually used the following ephemeris (I don't remember from where..)

  HJD = 2444787.321141 + 0.062427860 * E

  Using the linear ephemeris, our program has yielded the virtually
same ephemeris as Vrielmann's.

  YYMMDD HH:MM:SS (UT)
  980526 23:55:47
  980527 01:25:41
  980527 02:55:34
  980527 04:25:28
  980527 05:55:22
  980527 07:25:15
  980527 08:55:09
  980527 10:25:03
  980527 11:54:56
  980527 13:24:50
  980527 14:54:44
  980527 16:24:37
  980527 17:54:31
  980527 19:24:25
  980527 20:54:18
  980527 22:24:12

  980527 23:54:06
  980528 01:23:59
  980528 02:53:53
  980528 04:23:47
  980528 05:53:40
  980528 07:23:34
  980528 08:53:28
  980528 10:23:21
  980528 11:53:15
  980528 13:23:09
  980528 14:53:02
  980528 16:22:56
  980528 17:52:50
  980528 19:22:43
  980528 20:52:37
  980528 22:22:31

  980528 23:52:24
  980529 01:22:18
  980529 02:52:12
  980529 04:22:05
  980529 05:51:59
  980529 07:21:53
  980529 08:51:46
  980529 10:21:40
  980529 11:51:34
  980529 13:21:27
  980529 14:51:21
  980529 16:21:15
  980529 17:51:08
  980529 19:21:02
  980529 20:50:56
  980529 22:20:49
  980529 23:50:43

  980530 01:20:37
  980530 02:50:30
  980530 04:20:24
  980530 05:50:18
  980530 07:20:11
  980530 08:50:05
  980530 10:19:59
  980530 11:49:52
  980530 13:19:46
  980530 14:49:40
  980530 16:19:34
  980530 17:49:27
  980530 19:19:21
  980530 20:49:15
  980530 22:19:08
  980530 23:49:02

Regards,
Taichi Kato

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