A giant flare from a weak-lined T Tauri Star TWA-7 detected with MAXI/GSC
Abstract
A star is born in dense dust and gas. In order to observe the newly-born star themselves, high energy X-ray band (> 2 keV) is a unique window, with high transparency ability. With a high sensitivity in the hard X-ray band (10-20 mCrab/day at 2-10keV band), GSC (Gas Slit Cameras: gas proportional counter) mounted in MAXI (Monitor of All-sky X-ray Image) is strong tool for "no bias"; research on star forming region and for search X-ray variabilities such as flares from Young Stellar Objects. In the course of the survey, we detected a giant flare from a weak-line T Tauri star TWA-7, which is a member of TW Hydrae Association, on 2010-09-07 UT18:00 -19:30 (Atel #2836). The detected maximum luminosity in 2-20 keV was 2 × 10^33 erg /s, if we assume the distance is 55 pc. This is the brightest among the flares which have been reported in the literatures. In the presentation, we will report the detailed results and discuss the characteristics in the flare.
- Publication:
-
The First Year of MAXI: Monitoring Variable X-ray Sources
- Pub Date:
- December 2010
- Bibcode:
- 2010fym..confP..34U