| ToO |
Last update of this page: Thu Jan 29 15:41:33 2009
Run State: TERMINATED/NS_TOO
USD review status:
O.K.!
| Pre-Imaging? | Special-Calibration? | Time-Critical? | ToO/GTO/Large program? | Carry-Over? | |
|---|---|---|---|---|---|
|
|
|
|
|
Special Remarks:
These are ToO OBs. The ToO run will be triggered when the target is in outburst.
Abstract for MTS:
ToO observations of a black hole X-ray binary, V4641 Sgr with the HITI mode of FORS2/VLT. There are 18 OBs and they are all identical. The field is rotated in order to put the target and another standard star simultaneously on the slit. This is also indicated in the attached finding chart. See "Special Execution Requirements".
Special Execution Requirements
==============================
Please note that the field is rotated in order to put the target and a comparison star simultaneously on the MOS slit. The position of the target, V4641 Sgr, is RA=18:19:21.58, Dec=-25:24:25.1. The neighbor comparison star, GSC2.2_S301231150215, is at RA=18:10:22.701, Dec=-25:24:17.84. The rotation angle is calculated to be -66.65 deg. (PA=66.65). The angular separation of them is about 18", so a long MOS slit (22") is preferable than a short one (20") for our observations.
ToO Information
===============
These are ToO OBs. The ToO run will be triggered when the target is in outburst.
The target, V4641 Sgr, is V=13.8 at quiescence and V=12-10 during outbursts (highly variable). The ToO observation should be performed even under thin clouds or bad seeings when it is tiggered.
All OBs take 1 hour execution time with the HIT_OS3 mode. Total observing time is 18 hrs. It depends on the situation how many OBs should be performed in one night, while the PI puts the minimum and maximum time, that is, 2 and 6 hours (2 and 6 OBs) in one night, respectively. So, the range of run times is variable between 2 - 6 hours in one night, and the number of nights for this ToO is also variable between 3 - 9 nights (18/6 - 18/2). The PI will notify the number of OBs to be performed in one night, at the same time that the PI triggers the ToO run.
ToO Activators List
===================
Makoto Uemura (PI; Hiroshima Univ.) uemuram@hiroshima-u.ac.jp
Taichi Kato (Kyoto Univ.) tkato@kusastro.kyoto-u.ac.jp
Daisaku Nogami (Kyoto Univ.) nogami@kwasan.kyoto-u.ac.jp
Akira Imada (Kyoto Univ.) a_imada@kusastro.kyoto-u.ac.jp
Ryoko Ishioka (National Astronomical Observatory Japan) ishioka@subaru.naoj.org
Kazutaka Yamaoka (Aoyama Gakuin Univ.) yamaoka@phys.aoyama.ac.jp
README of this run:
Web version of approved README readme_79011600.html