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Data reduction pipeline for the Hi-GAL survey
Natoli, P.; Piacentini, F.; Polenta, G. +13 more
We present the data reduction pipeline for the Herschel Infrared Galactic Plane survey (Hi-GAL). Hi-GAL is a key project of the Herschel satellite, which is mapping the inner part of the Galactic plane (|l| ≤ 70° and |b| ≤ 1°), using two Photodetector Array Camera and Spectrometer (PACS) and three Spectral and Photometric Imaging Receiver (SPIRE) …
Heavy ion escape from Mars, influence from solar wind conditions and crustal magnetic fields
Barabash, Stas; Lundin, Rickard; Nilsson, Hans +5 more
We have used more than 4 years of Mars Express ion data to estimate the escape of heavy ions ( O+,O2+ and CO2+) from Mars. To take the limited field of view of the instrument into account, the data has been binned into spatial bins and angular bins to create average distribution functions for different positions in the near Mars space. …
Reflection in Seyfert galaxies and the unified model of AGN
Paltani, S.; Walter, R.; Ricci, C. +1 more
We present a deep study of the average hard X-ray spectra of Seyfert galaxies. We aim to test the unified model of active galactic nuclei, and constrain differences and similarities between different classes of objects. We analyzed all public INTEGRAL IBIS/ISGRI data available on all the 165 Seyfert galaxies detected at z < 0.2. Our final sampl…
The emission line properties of gravitationally lensed 1.5 < z < 5 galaxies
Richard, Johan; Ellis, Richard; Stark, Daniel P. +3 more
We present and analyse near-infrared spectroscopy for a sample of 28 gravitationally lensed star-forming galaxies in the redshift range 1.5 < z < 5, observed mostly with the Keck II telescope. With typical magnifications of ≃1.5-4 mag, our survey provides a valuable census of star formation rates, gas-phase metallicities and dynamical masses…
First Results from the 3D-HST Survey: The Striking Diversity of Massive Galaxies at z > 1
Schmidt, Kasper B.; van Dokkum, Pieter G.; Franx, Marijn +26 more
We present first results from the 3D-HST program, a near-IR spectroscopic survey performed with the Wide Field Camera 3 (WFC3) on the HST. We have used 3D-HST spectra to measure redshifts and Hα equivalent widths (EWHα) for a complete, stellar mass-limited sample of 34 galaxies at 1 < z < 1.5 with M star > 1011<…
Corona, Jet, and Relativistic Line Models for Suzaku/RXTE/Chandra-HETG Observations of the Cygnus X-1 Hard State
Pottschmidt, Katja; Wilms, Jörn; Tramper, Frank +7 more
Using Suzaku and the Rossi X-ray Timing Explorer (RXTE), we have conducted a series of four simultaneous observations of the galactic black hole candidate Cyg X-1 in what were historically faint and spectrally hard "low states." Additionally, all of these observations occurred near superior conjunction with our line of sight to the X-ray source pa…
Cross-calibration of the X-ray instruments onboard the Chandra, INTEGRAL, RXTE, Suzaku, Swift, and XMM-Newton observatories using G21.5-0.9
Read, A. M.; Guainazzi, M.; Tsujimoto, M. +7 more
Context. For many years, X-ray astronomy missions have used the Crab nebula as a celestial calibration source for the X-ray flux and spectral shape. However, the object is often too bright for current and future missions equipped with instruments with improved sensitivity.
Aims: We use G21.5-0.9, a pulsar-wind nebula with a time-constant powe…
Herschel Measurements of Molecular Oxygen in Orion
Caselli, Paola; Li, Di; Viti, Serena +32 more
We report observations of three rotational transitions of molecular oxygen (O2) in emission from the H2 Peak 1 position of vibrationally excited molecular hydrogen in Orion. We observed the 487 GHz, 774 GHz, and 1121 GHz lines using the Heterodyne Instrument for the Far Infrared on the Herschel Space Observatory, having veloc…
The DEEP3 Galaxy Redshift Survey: Keck/DEIMOS Spectroscopy in the GOODS-N Field
Nandra, Kirpal; Davis, Marc; Juneau, Stéphanie +8 more
We present the results of spectroscopic observations in the GOODS-N field completed using DEIMOS on the Keck II telescope as part of the DEEP3 Galaxy Redshift Survey. Observations of 370 unique targets down to a limiting magnitude of R AB = 24.4 yielded 156 secure redshifts. In addition to redshift information, we provide sky-subtracted…
The Be Star Spectra (BeSS) Database
Neiner, C.; Floquet, M.; de Batz, B. +3 more
Be stars vary on many timescales, from hours to decades. A long time base of observations to analyze certain phenomena in these stars is therefore necessary. Collecting all existing and future Be star spectra into one database has thus emerged as an important tool for the Be star community. Moreover, for statistical studies, it is useful to have c…