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XMM-Newton spectrum of the magnetar CXOU J171405.7-381031
Bamba, Aya; Watanabe, Haruka; Shibata, Shinpei +1 more
We observe the magnetar CXOU J171405.7-381031 with XMM-Newton and obtain the most reliable X-ray spectral parameters for this magnetar. After removing the flux from the surrounding supernova remnant CTB 37B, the radiation of CXOU J171405.7-381031 is best described by a two-component model, consisting of a blackbody and power law. We obtain a black…
Ground-based Paα narrow-band imaging of local luminous infrared galaxies. II. Bulge structure and star formation activity
Komugi, Shinya; Takahashi, Hidenori; Doi, Mamoru +8 more
We present properties of two types of bulges (classical and pseudobulges) in 20 luminous infrared galaxies observed in the near infrared of the H, Ks, and 1.91µm narrow-band targeting of the hydrogen Paα emission line by the University of Tokyo Atacama Observatory 1 m telescope. To classify the two types of bulges, we first perfor…
Characterization of diffuse X-ray emission from IGR J17448-3232: an implication of a line-of-sight merging activity
Akamatsu, Hiroki; Nobukawa, Kumiko K.; Yamauchi, Shigeo +1 more
The results of spectral analysis for the galaxy cluster IGR J17448-3232 are presented. The intracluster medium (ICM) in the central region (r< 300^' ' }, 320kpc) has a high electron temperature plasma of kT_e ∼ 13-15keV, and an ionization temperature estimated from an intensity ratio of Fe XXVI Lyα /Fe XXV Heα lines is lower than the electron t…
First data release of the Hyper Suprime-Cam Subaru Strategic Program
Ono, Yoshiaki; Ouchi, Masami; Momose, Rieko +107 more
The Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) is a three-layered imaging survey aimed at addressing some of the most important outstanding questions in astronomy today, including the nature of dark matter and dark energy. The survey has been awarded 300 nights of observing time at the Subaru Telescope, and it started in 2014 March. This…
The first-year shear catalog of the Subaru Hyper Suprime-Cam Subaru Strategic Program Survey
Strauss, Michael A.; Sifón, Cristóbal; Miyatake, Hironao +28 more
We present and characterize the catalog of galaxy shape measurements that will be used for cosmological weak lensing measurements in the Wide layer of the first year of the Hyper Suprime-Cam (HSC) survey. The catalog covers an area of 136.9 deg2 split into six fields, with a mean i-band seeing of 0{^''.}58 and 5σ point-source…
Atmospheric gas dynamics in the Perseus cluster observed with Hitomi
Done, Chris; Safi-Harb, Samar; Hamaguchi, Kenji +195 more
Extending the earlier measurements reported in Hitomi collaboration (2016, Nature, 535, 117), we examine the atmospheric gas motions within the central 100 kpc of the Perseus cluster using observations obtained with the Hitomi satellite. After correcting for the point spread function of the telescope and using optically thin emission lines, we fin…
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 quasars and luminous galaxies at 5.7 < z ≤ 6.8
Ono, Yoshiaki; Ouchi, Masami; Goto, Tomotsugu +43 more
We present spectroscopic identification of 32 new quasars and luminous galaxies discovered at 5.7 < z ≤ 6.8. This is the second in a series of papers presenting the results of the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the deep multi-band imaging data produced by the Hyper Suprime-Cam (HSC) Subaru …
The bright-star masks for the HSC-SSP survey
Oguri, Masamune; Medezinski, Elinor; Bosch, James +4 more
We present the procedure to build and validate the bright-star masks for the Hyper-Suprime-Cam Strategic Subaru Proposal (HSC-SSP) survey. To identify and mask the saturated stars in the full HSC-SSP footprint, we rely on the Gaia and Tycho-2 star catalogues. We first assemble a pure star catalogue down to GGaia < 18 after removing ∼…
Characterization and photometric performance of the Hyper Suprime-Cam Software Pipeline
Leauthaud, Alexie; Mandelbaum, Rachel; Bosch, James +9 more
The Subaru Strategic Program (SSP) is an ambitious multi-band survey using the Hyper Suprime-Cam (HSC) on the Subaru telescope. The Wide layer of the SSP is both wide and deep, reaching a detection limit of i ∼ 26.0 mag. At these depths, it is challenging to achieve accurate, unbiased, and consistent photometry across all five bands. The HSC data …
Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi
Done, Chris; Safi-Harb, Samar; Hamaguchi, Kenji +192 more
The Hitomi Soft X-ray Spectrometer spectrum of the Perseus cluster, with ∼5 eV resolution in the 2-9 keV band, offers an unprecedented benchmark of the atomic modeling and database for hot collisional plasmas. It reveals both successes and challenges of the current atomic data and models. The latest versions of AtomDB/APEC (3.0.8), SPEX (3.03.00),…