68 citations · 451 across the 20 of their papers we have counts for
20 papers
A Discovery of a Peculiar Pulsar in the Small Magellanic Cloud
Masaru Ueno, Hiroya Yamaguchi, Shin-ichiro Takagi +2
We report on a peculiar X-ray binary pulsar IKT1 = RXJ0047.3-7312 observed with XMM-Newton in Oct. 2000. The X-ray spectrum is described by a two-component spectrum. The hard compo…
Review of Discrete X-Ray Sources in the Small Magellanic Cloud: Summary of the ASCA Results and Implication on the Recent Star Forming Activity
Jun Yokogawa, Kensuke Imanishi, Masahiro Tsujimoto +2
We made 22 observations on the Small Magellanic Cloud (SMC) and covered full regions by the end of the ASCA mission. We detected 106 discrete sources with a criterion of S/N > 5 an…
Diffuse X-rays in the Galactic center region -- The zoo of iron line clumps, non-thermal filaments and hot plasmas --
Aya Bamba, Hiroshi Murakami, Atsushi Senda +3
This paper reports the diffuse X-ray features around the Galactic center observed with Chandra. We confirm the ASCA and Ginga discoveries of the large-scale thin-thermal plasma wit…
Centrally Peaked X-Ray Supernova Remnants in the Small Magellanic Cloud Studied with ASCA and ROSAT
Jun Yokogawa, Kensuke Imanishi, Katsuji Koyama +2
This paper presents ASCA/SIS and ROSAT/HRI results of three supernova remnants (SNRs) in the Small Magellanic Cloud: 0103-726, 0045-734, and 0057-7226. The ROSAT/HRI images of thes…
Discovery of a Transient X-Ray Pulsar, AX J1841.0-0536, in the Scutum Arm Region with ASCA
Aya Bamba, Jun Yokogawa, Masaru Ueno +2
We report on the discovery of a transient X-ray pulsar, AX J1841.0-0536, serendipitously found in the Scutum arm region with the ASCA in two separate observations. The X-ray flux i…
A 168-s X-Ray Pulsar in the SMC Observed with ASCA
Jun Yokogawa, Ken'ichi Torii, Takayoshi Kohmura +1
This paper has been withdrawn because the class file must not be uploaded.
ASCA Identification of SMC X-2 with the 2.37-s Pulsar Discovered by RXTE
Jun Yokogawa, Ken'ichi Torii, Takayoshi Kohmura +1
This paper has been withdrawn because the class file must not be uploaded.
Discovery of a 9-s X-Ray Pulsar, AX J0049-732, in the Small Magellanic Cloud
Masaru Ueno, Jun Yokogawa, Kensuke Imanishi +1
We report the ASCA discovery of a new X-ray pulsar, AX J0049-732, in the Small Magellanic Cloud (SMC). The pulse shape is sinusoidal with a barycentric period of 9.1320 +/- 0.0004…
Discovery of the Slowest X-Ray Pulsar in the SMC, AX J0049.5-7323, with ASCA
Jun Yokogawa, Kensuke Imanishi, Masaru Ueno +1
The discovery of coherent pulsations with ASCA from an X-ray source, AX J0049.5-7323, is reported. The barycentric period was determined to be 755.5 +/- 0.6 s, which is the longest…
Discovery of 101-s Pulsations from AX J0057.4-7325 in the SMC with ASCA
Jun Yokogawa, Ken'ichi Torii, Takayoshi Kohmura +2
The results from two ASCA observations of AX J0057.4-7325 = RX J0057.3-7325 are presented. Coherent pulsations with a barycentric period of 101.45 +/- 0.07 s were discovered in the…
ASCA Observations of the Twin Supernova Remnants in the Large Magellanic Cloud, DEM L316
Mamiko Nishiuchi, Jun Yokogawa, Katsuji Koyama +1
We report results from an ASCA X-ray study of DEM L316, an emission nebula in the Large Magellanic Cloud (LMC) consisting of two closely-spaced supernova remnants (SNRs). The SIS i…
Discovery of 172-s Pulsations from a Be/X-ray Binary Candidate AX J0051.6-7311 in the SMC with ASCA
Jun Yokogawa, Ken'ichi Torii, Kensuke Imanishi +1
The results from three ASCA observations of AX J0051.6-7311 = RX J0051.9-7311 are reported. Coherent pulsations with a barycentric period of 172.40 +/- 0.03 s were discovered in th…
Discovery of a new pulsating X-ray source with a 1549.1-s period, AX J183220-0840
M. Sugizaki, K. Kinugasa, K. Matsuzaki +3
A new pulsating X-ray source, AX J183220-0840, with a 1549.1-s period was discovered at R.A.= 18h32m20s and Dec.=-8d40'30'' (J2000, uncertainty=0.6degree) during an ASCA observatio…
ASCA Observation of the New Transient X-ray Pulsar XTE J0111.2-7317 in the Small Magellanic Cloud
Jun Yokogawa, Biswajit Paul, Masanobu Ozaki +3
The new transient X-ray pulsar XTE J0111.2-7317 was observed with Advanced Satellite for Cosmology and Astrophysics (ASCA) on 1998 November 18, a few days after its discovery with…
Broad-Band X-Ray Study of a Transient Pulsar RX J0059.2-7138
Makoto Kohno, Jun Yokogawa, Katsuji Koyama
We report on the results of the ASCA and ROSAT observations on RX J0059.2-7138, a transient X-ray pulsar in the Small Magellanic Cloud. The barycentric pulse period has been precis…
Deep X-Ray Observations of Supernova Remnants G359.1-0.5 and G359.0-0.9 with ASCA
Aya Bamba, Jun Yokogawa, Masaaki Sakano +1
We present the results of deep ASCA observations of two shell-like radio supernova remnants (SNRs) located in the direction to the Galactic center (GC) region. Unlike the radio mor…
A Study of the Populations of X-ray Sources in the Small Magellanic Cloud with ASCA
Jun Yokogawa, Kensuke Imanishi, Masahiro Tsujimoto +4
The Advanced Satellite for Cosmology and Astrophysics (ASCA) has made multiple observations of the Small Magellanic Cloud (SMC). X-ray mosaic images in the soft (0.7--2.0 keV) and…
Discovery of an X-Ray Pulsar in the SMC: AX J0058-7203
Masahiro Tsujimoto, Kensuke Imanishi, Jun Yokogawa +1
We report on the discovery and analysis of an X-ray pulsar, AX J0058-7203, in the Small Magellanic Cloud. This pulsar exhibits coherent pulsations at P= 280.3 s with a double-peak…
ASCA Discovery of a Be X-Ray Pulsar in the SMC: AX J0051-733
Kensuke Imanishi, Jun Yokogawa, Masahiro Tsujimoto +1
ASCA observed the central region of the Small Magellanic Cloud, and found a hard X-ray source, AX J0051-733, at the position of the ROSAT source RX J0050.8-7316, which has an optic…
SNRs in the Galactic Center region observed with ASCA
M. Sakano, J. Yokogawa, H. Murakami +3
We report the ASCA results of the supernova remnants (SNRs) and their candidates in the Galactic Center region. We found apparent X-ray emission from G359.1-0.5 and G0.9+0.1, and m…