We present the detection of an absorption feature at = + E 8.77 0.06 0.05 keV in the combined X-ray spectrum of the ultraluminous X-ray source NGC 1313 X-1 observed with XMM-Newton and NuSTAR, significant at the 3σ level. If associated with blueshifted ionized iron, the implied outflow velocity is ∼0.2c for Fe XXVI, or ∼0.25c for Fe XXV. These velocities are similar to the ultrafast outflow see...

Following the discovery of 3:2 resonance quasi-periodic oscillations (QPOs) in M82X-1, we have constructed power density spectra (PDS) of all 15 (sufficiently long) XMM-Newton observations of the ultraluminous X-ray source NGC 1313 X-1 (LX ≈ 2 × 10 40 erg s). We detect a strong QPO at a frequency of 0.29 ± 0.01 Hz in data obtained on 2012 December 16. Subsequent searching of all the remaining o...

We have analyzed an XMM-Newton observation of the nearby spiral galaxy NGC 1313, which contains two “ultraluminous” X-ray (ULX) sources. We measure isotropic luminosities of ergs s 1 and 40 L p 2.0 # 10 X ergs s 1 for NGC 1313 X-1 and X-2 (0.2–10.0 keV, assuming a distance of 3.7 Mpc). The 39 L p 6.6 # 10 X spectra statistically require soft and hard spectral components to describe the continuu...

BACKGROUND Clostridium thermocellum is a gram-positive thermophile that can directly convert lignocellulosic material into biofuels. The metabolism of C. thermocellum contains many branches and redundancies which limit biofuel production, and typical genetic techniques are time-consuming. Further, the genome sequence of a genetically tractable strain C. thermocellum DSM 1313 has been recently s...