10 papers
Bright X-ray flares from the BL Lac object Mrk 421, detected with MAXI in 2010 January and February
Naoki Isobe, Kousuke Sugimori, Nobuyuki Kawai +28
Strong X-ray flares from the blazar Mrk 421 were detected in 2010 January and February through the 7 month monitoring with the MAXI GSC. The maximum 2 -- 10 keV flux in the January…
MAXI GSC observations of a spectral state transition in the black hole candidate XTE J1752-223
Satoshi Nakahira, Kazutaka Yamaoka, Mutsumi Sugizaki +29
We present the first results on the black hole candidate XTE J1752-223 from the Gas Slit Camera (GSC) on-board the Monitor of All-sky X-ray Image (MAXI) on the International Space…
"Dark" GRB 080325 in a Dusty Massive Galaxy at z ~ 2
T. Hashimoto, K. Ohta, K. Aoki +30
We present optical and near infrared observations of GRB 080325 classified as a "Dark GRB". Near-infrared observations with Subaru/MOIRCS provided a clear detection of afterglow in…
Spectral Lag Relations in GRB Pulses Detected with HETE-2
M. Arimoto, N. Kawai, K. Asano +36
Using a pulse-fit method, we investigate the spectral lags between the traditional gamma-ray band (50-400 keV) and the X-ray band (6-25 keV) for 8 GRBs with known redshifts (GRB 01…
The MAXI Mission on the ISS: Science and Instruments for Monitoring All Sky X-Ray Images
Masaru Matsuoka, Kazuyoshi Kawasaki, Shiro Ueno +29
The MAXI (Monitor of All-sky X-ray Image) mission is the first astronomical payload to be installed on the Japanese Experiment Module-Exposed Facility (JEM-EF) on the ISS. It is sc…
Suzaku Observations of SGR 1900+14 and SGR 1806-20
Yujin E. Nakagawa, Tatehiro Mihara, Atsumasa Yoshida +8
Spectral and timing studies of Suzaku ToO observations of two SGRs, 1900+14 and 1806-20, are presented. The X-ray quiescent emission spectra were well fitted by a two blackbody fun…