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[vsnet-obs 38997] SN 2002bo obs/comparison stars (CTIO)
- Date: Fri, 15 Mar 2002 11:27:41 +0900 (JST)
- To: vsnet-obs@kusastro.kyoto-u.ac.jp
- From: Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>
- Subject: [vsnet-obs 38997] SN 2002bo obs/comparison stars (CTIO)
- Cc: vsnet-campaign-sn@kusastro.kyoto-u.ac.jp
- Delivered-To: vsnet-obs@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-obs@ooruri.kusastro.kyoto-u.ac.jp
>Date: Wed, 13 Mar 2002 17:31:24 -0400 (CLT)
From: Kevin Krisciunas x339 <kevin@ctiosz.ctio.noao.edu>
Subject: SN 2002bo
A J-band finder chart can be found at
http://vsnet.ctio.noao.edu/pub/nick/yalo/sn2002bo.jpg
>From observations on 11/12 March 2002 preliminary reduction gives:
SN 2002bo V = 15.25 +/- 0.02, B-V = 0.48 +/- 0.01
star 1 V = 14.42 +/- 0.01, B-V = 0.76 +/- 0.02
star 2 V = 17.13 +/- 0.05, B-V = 1.20 +/- 0.10
The data were taken by Juan Espinoza with the 1-m YALO telescope
at CTIO, reduced by Pablo Candia and Kevin Krisciunas.
---
>Date: Thu, 14 Mar 2002 11:42:52 -0400 (CLT)
From: Kevin Krisciunas x339 <kevin@ctiosz.ctio.noao.edu>
Subject: Re: SN 2002bo
If you want three colors instead of just one:
11/12 March 2002, 4 hours UT +/-
V B-V V-R V-I
sn2002bo 15.235 0.020 0.473 0.032 0.347 0.024 0.346 0.038
sn2002bo-1 14.408 0.009 0.768 0.019 0.433 0.011 0.801 0.014
sn2002bo-2 17.184 0.110 1.193 0.277 0.804 0.111 1.430 0.127
sn2002bo 15.261 0.021 0.488 0.034 INDEF INDEF 0.283 0.041
sn2002bo-1 14.426 0.009 0.748 0.019 INDEF INDEF 0.778 0.014
sn2002bo-2 17.076 0.095 1.396 0.284 INDEF INDEF 1.223 0.116
this is based on one set of frames BVRI and a different set of BVI.
So you can see that the uncertainties are like 0.02, 0.03, 0.02 and 0.04
mag. Star 2 is apparently quite red, which makes it bright for IR, but
possibly variable.
kevin
---
SN2002bo 20020312.2 15.25V CTI
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