Search Publications
Suzaku observation of X-ray variability in soft state LMC X-1
Makishima, Kazuo; Tashiro, Makoto S.; Terada, Yukikatsu +3 more
This paper reports the results of Suzaku observation of the spectral variation of the black hole binary LMC X-1 in the soft state. The observation was carried out in 2009 from July 21 to 24. the obtained net count rate was ∼ 30 counts s-1 in the 0.5-50 keV band with ∼ 10% peak-to-peak flux variation. The time-averaged X-ray spectrum can…
A study on the mid-infrared sources that dramatically brightened
Matsunaga, Noriyuki; Nakada, Yoshikazu; Ita, Yoshifusa +5 more
We present results of near-infrared (NIR) photometric and spectroscopic observations of mid-infrared (MIR) sources that brightened dramatically. Using Infrared Astronomical Satellite (IRAS), AKARI, and Wide-field Infrared Survey Explorer (WISE) point source catalogs, we found that four sources (IRAS 19574+4941, V2494 Cyg, IRAS 22343+7501, and V583…
An obscured narrow-line Seyfert 1 galaxy candidate, Mrk 1388 with nonthermal jets
Doi, Akihiro
Mrk 1388 has an unusual Seyfert nucleus that shows narrow emission-line components without broad emission-line ones, but shows a strong featureless continuum and strong iron-forbidden, high-ionization emission lines. The apparent coexistence of type-1/2 characteristics is potentially attributed to a heavily obscured broad-line region or to an inte…
Suzaku observations of the old pulsar wind nebula candidate HESS J1356-645
Dotani, Tadayasu; Bamba, Aya; Hiraga, Junko S. +3 more
A largely extended X-ray emission was discovered around the pulsar PSR J1357-6429 with the Suzaku deep observations. The pulsar, whose characteristic age is 7.3 kyr, is located within the TeV γ-ray source HESS J1356-645. The extended emission is found to have a 1 σ X-ray size of ∼ 4', or ∼ 3 pc at 2.4 kpc, with a small offset from the pulsar. Its …
Physical properties of distant red galaxies in the COSMOS/UltraVISTA field
Fang, Guanwen; Kong, Xu; Fan, Lulu +1 more
We present a study on physical properties for a large distant red galaxy (DRG) sample, using the K-selected multi-band photometry catalog of the COSMOS/UltraVISTA field and the CANDELS near-infrared data. Our sample includes 4485 DRGs with (J - K)AB > 1.16 and KAB < 23.4 mag, and 132 DRGs have HST/WFC3 morphological mea…