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[vsnet-chat 2358] R CrB sequence
- Date: Mon, 18 Oct 1999 18:08:15 -0700
- To: vsnet-chat@kusastro.kyoto-u.ac.jp
- From: reinder j bouma <rjbouma@wxs.nl>
- Subject: [vsnet-chat 2358] R CrB sequence
- References: <199910181308.PAA23018@brahe.astro.rug.nl>
- Reply-To: rjbouma@wxs.nl
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
Dear all,
When observing R CrB recently I (again) noted that the AAVSO-sequence is
looking very odd in the magnitude 12-14 region. To me comparisons 122,
137 and 140 look OK, more or less, but the 126, 131, and 135 look (much)
brighter.
Can somebody supply me with better magnitudes? And if this is not
available, can somebody do photometry in the magnitude 12-15 range? This
would be very useful.
Recent VSNET-postings also suggest that something odd is going on here.
See the recent observations below. Since about October 11, when R CrB
started to fade through the poor magnitude range, the scatter, which is
normally less than 0.5 magnitude, occasionally increased to about 1.0
magnitude, and only so when one ignores 2 apparent erroneous
observations, possibly due to misidentification of the variable.
Best regards,
> R CrB fading (cont'd)
>
> YYMMDD(UT) mag observer
> 990930.101 109 (G. Hanson)
> 990930.403 111 (M. Sato)
> 990930.791 107 (J. Ripero)
> 990930.800 109 (L. Kiss)
> 991001.065 107 (R. J. Modic)
> 991001.098 108 (G. Hanson)
> 991002.094 109 (G. Hanson)
> 991002.394 110 (H. Itoh)
> 991002.442 110 (T. Watanabe)
> 991002.771 106 (G. Comello)
> 991002.776 108 (R. J. Bouma)
> 991002.780 109 (C. P. Jones)
> 991002.796 109 (E. Muyllaert)
> 991003.769 113 (M. Verdenet)
> 991003.792 108 (H. Hautecler)
> 991003.799 109 (G. Gyzman)
> 991004.097 111 (G. Hanson)
> 991004.769 113 (M. Verdenet)
> 991004.787 112 (C. P. Jones)
> 991004.799 115 (G. Poyner)
> 991005.012 113 (E. van Ballegoij)
> 991005.096 112 (G. Hanson)
> 991005.760 115 (G. Comello)
> 991005.769 113 (M. Verdenet)
> 991005.789 113 (C. P. Jones)
> 991005.790 116 (M. Verdenet)
> 991005.808 114 (R. J. Bouma)
> 991005.828 113 (E. Muyllaert)
> 991006.092 113 (G. Hanson)
> 991006.781 115 (E. Muyllaert)
> 991006.799 115 (G. Gyzman)
> 991006.819 116 (C. Ramillon)
> 991007.087 115 (G. Hanson)
> 991007.799 119 (M. Verdenet)
> 991008.094 117 (G. Hanson)
> 991008.981 116 (E. van Ballegoij)
> 991009.094 120 (G. Hanson)
> 991009.389 118 (M. Sato)
> 991009.441 121 (T. Watanabe)
> 991010.780 124 (M. Verdenet)
> 991010.800 126 (G. Gyzman)
> 991011.090 121 (G. Hanson)
> 991011.385 121 (H. Itoh)
> 991011.394 119 (N. Makiguchi)
> 991011.408 121 (T. Watanabe)
> 991011.774 123 (E. Muyllaert)
> 991011.776 124 (C. P. Jones)
> 991011.800 127 (M. Verdenet)
> 991012.089 124 (G. Hanson)
> 991012.764 120 (K-G. Andersson)
> 991012.774 124 (E. Muyllaert)
> 991012.780 129 (M. Verdenet)
> 991012.782 125 (G. Poyner)
> 991012.798 128 (C. P. Jones)
> 991013.090 125 (G. Hanson)
> 991013.762 124 (G. Comello)
> 991013.772 130 (C. P. Jones)
> 991013.778 126 (H. Hautecler)
> 991013.785 124 (G. Poyner)
> 991013.801 129 (E. Muyllaert)
> 991014.769 132 (M. Verdenet)
> 991015.094 132 (R. J. Modic)
> 991015.753 124 (G. Comello)
> 991015.792 130 (R. J. Bouma)
> 991016.748 120: (T. Lange)
> 991016.751 134 (G. Comello)
> 991016.756 134 (R. J. Johanns)
> 991016.776 136 (C. P. Jones)
> 991017.742 115 (V. Tuboly)
> 991017.751 134 (G. Comello)
> 991017.767 136 (C. P. Jones)
> 991018.090 135 (G. Hanson)
---------------------------------------------------
Reinder J. Bouma email: rjbouma@wxs.nl
Bekemaheerd 77 or: rjbouma@planet.nl
9737PR Groningen
The Netherlands phone: +31 (0)50-5418227
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