Ole Streicher

Leibniz Institute for Astrophysics Potsdam · 3D spectroscopy

The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph currently in manufacturing, assembly and integration phase. MUSE has a field of 1x1 arcmin2 sampled at 0.2x0.2 arcsec2 and is assisted by the VLT ground layer adaptive optics ESO facility using four laser guide stars. The instrument is a la...

The Astropy Project supports and fosters the development of open-source and openly developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project is the core package astropy, which serves as the foundation for more specialized projects and packages. In this article, we summar...

The Astropy Project supports and fosters the development of open-source and openly-developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project is the core package $\texttt{astropy}$, which serves as the foundation for more specialized projects and packages. In this article...

The processing of raw data from modern astronomical instruments is often carried out nowadays using dedicated software, known as pipelines, largely run in automated operation. In this paper we describe the data reduction pipeline of the Multi Unit Spectroscopic Explorer (MUSE) integral field spectrograph operated at the ESO Paranal Observatory. Thi...

Processing of raw data from modern astronomical instruments is nowadays often carried out using dedicated software, so-called "pipelines" which are largely run in automated operation. In this paper we describe the data reduction pipeline of the Multi Unit Spectroscopic Explorer (MUSE) integral field spectrograph operated at ESO's Paranal observator...

www.ivoa.net/twiki/bin/view/IVOA/IvoaDataModel

In the context of astronomy projects, provenance information is important to enable scientists to trace back the origin of a dataset. It is used to learn about the people and organizations involved in a project and assess the quality of the dataset as well as the usefulness of the dataset their scientific work. As part of the data model group in th...

The Astropy Project supports and fosters the development of open-source and openly developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project is the core package astropy, which serves as the foundation for more specialized projects and packages. In this article, we provid...

The Astropy project supports and fosters the development of open-source and openly-developed Python packages that provide commonly-needed functionality to the astronomical community. A key element of the Astropy project is the core package Astropy, which serves as the foundation for more specialized projects and packages. In this article, we provid...

Debian Astro is a Debian Pure Blend that aims to distribute the available astronomy software within the Debian operating system. Using Debian as the foundation has unique advantages for end-users and developers such as an easy installation and upgrading of packages, an open distribution and development model, or the reproducibility due to the stand...

The Astropy Project (http://astropy.org) is, in its own words, "a community effort to develop a single core package for Astronomy in Python and foster interoperability between Python astronomy packages." For five years this project has been managed, written, and operated as a grassroots, self-organized, almost entirely volunteer effort while the so...

MUSE, a giant integral field spectrograph, is about to become the newest facility instrument at the VLT. It will see first light in February 2014. Here, we summarize the properties of the instrument as built and outline functionality of the data reduction system, that transforms the raw data that gets recorded separately in 24 IFUs by 4k CCDs, into...

The Flexible Image Transport System (FITS) standard has been a great boon to astronomy, allowing observatories, scientists and the public to exchange astronomical information easily. The FITS standard, however, is showing its age. Developed in the late 1970s, the FITS authors made a number of implementation choices that, while common at the time, a...

The Multi Unit Spectroscopic Explorer (MUSE) is now in Paranal and was installed on the VLT's Unit Telescope 4 in January 2014. MUSE enters science operations in October. A short summary of the commissioning activities and Science Verification are presented. Some examples of the first results achieved during the two commissioning runs are highlight...

VIRUS is the visible, integral-field replicable unit spectrograph for the Hobby-Eberly-Telescope (HET) consisting of 75 integral-field-units that feed 150 spectrographs. The full VIRUS instrument features over 33,000 fibres, each projecting to 1.5 arcseconds diameter on sky, deployed at the prime focus of the upgraded 10m HET. The assembly and acce...

MUSE (Multi Unit Spectroscopic Explorer) is a second generation instrument, built for ESO (European Southern Observatory) and dedicated to the VLT (Very Large Telescope). This instrument is an innovative integral field spectrograph (1x1 arcmin 2 Field of View), operating in the visible wavelength range, from 465 nm to 930 nm. The MUSE project is su...

MUSE (Multi Unit Spectroscopic Explorer) is a second generation instrument built for ESO (European Southern Observatory). The MUSE project is supported by a European consortium of 7 institutes. After the finalisation of its integration in Europe, the MUSE instrument has been partially dismounted and shipped to the VLT (Very Large Telescope) in Chil...

We present the first public version (v0.2) of the open-source and community-developed Python package, Astropy. This package provides core astronomy-related functionality to the community, including support for domain-specific file formats such as Flexible Image Transport System (FITS) files, Virtual Observatory (VO) tables, and common ASCII table f...

High refractive index contrast waveguides with tight optical mode confinement are becoming indispensable in densely integrated high-resolution (R=Δ/Δλ~60,000) micro-spectrographs (MSG) for astronomical and biomedical applications. This paper presents first experimental results with alternative material technology (Silicon nitride-on-Silica) for Ast...

MUSE, the Multi Unit Spectroscopic Explorer, is a 2nd generation integral-field spectrograph under final assembly to see first light at the Very Large Telescope in 2013. By capturing ~ 90000 optical spectra in a single exposure, MUSE represents a challenge for data reduction and analysis. We summarise here the main features of the Data Reduction Sy...

[abridged] We carry out an integral field spectroscopy (IFS) study of a sample of luminous BCGs, with the aim to probe the morphology, kinematics, dust extinction and excitation mechanisms of their warm interstellar medium (ISM). IFS data for five luminous BCGs were obtained using VIRUS-P, the prototype instrument for the Visible Integral Field Rep...

MUSE (Multi Unit Spectroscopic Explorer) is a second generation instrument built for ESO (European Southern Observatory) to be installed in Chile on the VLT (Very Large Telescope). The MUSE project is supported by a European consortium of 7 institutes. After the critical turning point of shifting from the design to the manufacturing phase, the MUSE...

The Common Pipeline Library is a set of routines written by ESO to provide a standard interface for VLT instrument data reduction tasks (“pipelines”). To control these pipelines from Python, we developed a wrapper called PYTHON-CPL that allows one to conveniently work interactively and to process data as part of an automated data reduction system....

We discuss the current state of integrating the Mutli Unit Spectroscopic Explorer (hereafter: MUSE) software pipeline (Weilbacher et al. 2006) into the Astro-WISE system (Valentijn et al. 2007a; Vriend et al. 2012). MUSE is a future integral-field spectrograph for the VLT, consisting of 24 Integral Field Units (hereafter IFU). The MUSE data reduct...

The Multi-Unit Spectroscopic Explorer (MUSE), an integral-field spectrograph for the ESO Very Large Telescope, has been built and integrated by a consortium of 7 European institutes. MUSE can simultaneously record spectra across a field of view of 1 square arcminute in the wavelength range from 465nm to 930nm. The calibration unit (CU) for MUSE was...

The 24 IFU from MUSE are equipped with 4K x 4K CCD detectors which are operated at cryogenic temperature around 160 K. The large size of the chip combined with a rather fast camera (F/2) impose strong positioning constrains. The sensitive surface should remain in an angular envelope of less than 30 arc sec in both directions. The ambitious goal of...

The Centre de Recherche Astrophysique de Lyon (CRAL) has recently developed two instrument simulators for spectrographic instruments. They are based on Fourier optics, and model the whole chain of acquisition, taking into account both optical aberrations and diffraction effects, by propagating a wavefront through the instrument, according to the Fo...

The Multi Unit Spectroscopic Explorer (MUSE) instrument is a second-generation integral-field spectrograph in development for the Very Large Telescope (VLT), operating in the visible and near IR wavelength range (465-930 nm). Given the complexity of MUSE we have developed an instrument numerical simulator, which includes the whole chain of acquisit...

MUSE, the Multi Unit Spectroscopic Explorer,1 is an integral-field spectrograph under construction for the ESO VLT to see first light in 2013. It can record spectra of a 1'x1' field on the sky at a sampling of 0''.2x0''.2, over a wavelength range from 4650 to 9300Å. The data reduction for this instrument is the process which converts raw data from...

Integral-field spectrograph (IFS) instruments are well suited to observe extended and faint objects, such as planetary nebulæ and galaxies. A result of such observations are large quantities of raw data, which mostly require an expert to derive accurate scientific spectra. Most instruments handle up to several thousand spectra simultaneously, using...

The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation integral-field spectrograph currently in development for the Very Large Telescope (VLT), consisting of 24 Integral Field Units (IFU). This paper presents the methodology for sky subtraction to be used in the MUSE data reduction pipeline. The method is based on the parameterized sim...

The second release of the data reduction tool p3d now also supports the integral-field modes of the ESO VLT instruments VIMOS and FLAMES. This article describes the general capabilities of p3d and how its different tools can be invoked, with particular reference to its use with data from VIMOS and FLAMES.

(ABRIDGED) We present an analysis of NGC588 based on IFS data with PMAS, together with Spitzer images at 8 mi and 24 mi. The extinction distribution in the optical shows complex structure, with maxima correlating in position with those of the emission at 24 mi and 8 mi. The Ha luminosity absorbed by the dust within the GHIIR reproduces the structur...

The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph currently in manufacturing, assembly and integration phase. MUSE has a field of 1x1 arcmin2 sampled at 0.2x0.2 arcsec2 and is assisted by the VLT ground layer adaptive optics ESO facility using four laser guide stars. The instrument is a la...

The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph currently in manufacturing, assembly and integration phase. MUSE has a field of 1x1 arcmin(2) sampled at 0.2x0.2 arcsec(2) and is assisted by the VLT ground layer adaptive optics ESO facility using four laser guide stars. The instrument is...

MUSE (Multi Unit Spectroscopic Explorer) is a second generation instrument developed for ESO (European Southern Observatory) to be installed on the VLT (Very Large Telescope) in year 2012. The MUSE project is supported by a European consortium of 7 institutes. After a successful Final Design Review the project is now facing a turning point which co...

The Multi-Unit Spectroscopic Explorer (MUSE) is an integral-field spectrograph for the ESO Very Large Telescope. After completion of the Final Design Review in 2009, MUSE is now in its manufacture and assembly phase. To achieve a relative large field-of-view with fine spatial sampling, MUSE features 24 identical spectrograph-detector units. The acc...

The PMAS integral field spectrophotometer, operated at the Calar Alto Observatory 3.5m Telescope, is one of the most demanded instruments of its kind. The optical system was designed for a camera field of view to accommodate a 4K×4K detector with 15μm pixels. However, due to a failure of one of the initially foreseen 2K×4K CCDs in a mosaic configur...

High-frequency noise of Lake Baikal is investigated using a submersible self-contained instrument to determine the noise background for the acoustic detection of superhigh-energy neutrinos. It is found that, under stationary and uniform meteorological conditions, the integral noise power in the frequency band 1–50 kHz is virtually independent of de...

We review the present status of the Baikal Neutrino Project and present results of a search for upward going atmospheric neutrinos, WIMPs and magnetic monopoles obtained with the detector NT-200. Also, the results of a search for very high energy neutrinos are presented. An upper limit on the v e+v μ+v T neutrino diffuse flux of E 2 · F(E) < 1.3 ·...

We described the method of searching for events of high-energy neutrinos in the deep underwater Cherenkov detector at Lake Baikal. The results of analysis of experimental data accumulated by the NT-200 neutrino telescope in the period from April 1998 to February 2001 were presented. The limits on the value of diffused flux of electron antineutrinos...

The data accumulated for 780 days of operation of the NT-200 Baikal neutrino telescope were used to set the limit on the flux of prompt muons in the energy range from 3.2·104 to 1.6·106 GeV and on the hypothetical muon component that appeared in attempts to explain the knee in the cosmic rays spectrum by introducing new interactions in the energy r...

The Antarctic Muon And Neutrino Detector Array (AMANDA) is a high-energy neutrino telescope operating at the geographic South Pole. It is a lattice of photo-multiplier tubes buried deep in the polar ice between 1500 and . The primary goal of this detector is to discover astrophysical sources of high-energy neutrinos. A high-energy muon neutrino com...

The present status of the Baikal Neutrino Experiment and the present results of a search for upward going atmospheric neutrinos, WIMPs, and magnetic monopoles obtained with the NT-200 detector are reviewed. The results of a search for very high-energy neutrinos are presented as well. An upper limit on the νe +νe +ντ neutrino diffuse flux of E 2Φ(E)...

We review the present status of the Baikal Neutrino project, present updated results on the search for high energy extraterrestrial neutrinos, fast magnetic monop oles and neutrinos induced by WIMP annihilation in the center of the Earth and compare the recorded atmospheric neutrino flux to predictions.

We review the present status of the Baikal neutrino experiment. The structure and parameters of the neutrino telescope NT-200, which was put into operation in April 1998, are described. Selected methodological results are presented. Physics results cover separating up-going muons from atmospheric neutrinos, searches for neutrino events from WIMP an...

Measurements of optical properties in media enclosing Cherenkov neutrino telescopes are important not only at the moment of the selection of an adequate site, but also for the continuous characterization of the medium as a function of time. Over the two last decades, the Baikal collaboration has been measuring the optical properties of the deep wat...

The effect of hydrostatic pressure and its gradient on the optical parameters of fiber-optic cables for the calibration system of the -200 Baikal neutrino telescope was investigated. The mean delay time of the light signal in the fiber-optic cables of the system is shown to be virtually constant at absolute pressures varying from 0 to 150 atm; inci...

A search for nearly vertical up-going muon-neutrinos from neutralino annihilations in the center of the Earth has been performed with the AMANDA-B10 neutrino detector. The data collected in 130.1 days of live time in 1997, ∼109 events, have been analyzed for this search. No excess over the expected atmospheric neutrino background has been observed....

The Antarctic muon and neutrino detector array (AMANDA) began collecting data with ten strings in 1997. Results from the first year of operation are presented. Neutrinos coming through the Earth from the Northern Hemisphere are identified by secondary muons moving upward through the array. Cosmic rays in the atmosphere generate a background of down...

We review the present status of the Baikal Neutrino Project and present the results obtained with the deep underwater neutrino telescope NT-200

The core collapse of a massive star in the Milky Way will produce a neutrino burst, intense enough to be detected by existing underground detectors. The AMANDA neutrino telescope located deep in the South Pole ice can detect MeV neutrinos by a collective rate increase in all photo-multipliers on top of dark noise. The main source of light comes fro...

We present results based on data taken in 1997 with the 302-PMT Antarctic Muon and Neutrino Detector Array BID ("AMANDA-B10") array. Atmospheric neutrinos created in the northern hemisphere axe observed indirectly through their charged current interactions which produce relativistic, Cherenkov-light-emitting upgoing muons in the South Pole ice cap....

Diese Arbeit beschreibt die Entwicklung einer Methode zur Energierekonstruktion von Myonen in Unterwasserteleskopen unter Verwendung der Amplituden und Trefferwahrscheinlichkeiten der Photomultiplier. Die Methode wird auf die Daten des Myon- und Neutrinoteleskopes NT-96 angewandt.

We report on the search for nearly vertical up-going muon neutrinos from WIMP annihilations in the center of the Earth with the AMANDA-B10 detector. The whole data sample collected in 1997, 10^9 events, has been analyzed and a final sample of 15 up-going events is found in a restricted zenith angular region where a signal from WIMP annihilations is...

Neutrinos are elementary particles that carry no electric charge and have little mass. As they interact only weakly with other particles, they can penetrate enormous amounts of matter, and therefore have the potential to directly convey astrophysical information from the edge of the Universe and from deep inside the most cataclysmic high-energy reg...

We review the present status of the Baikal Neutrino Project and present preliminary results of a search for upward going atmospheric neutrinos, WIMPs and magnetic monopoles obtained with the detector NT-200 during 1998. Also the results of a search for very high energy neutrinos with partially completed detector in 1996 are presented.

This paper briefly summarizes the search for astronomical sources of high-energy neutrinos using the AMANDA-B10 detector. The complete data set from 1997 was analyzed. For Eμ > 10 TeV, the detector exceeds 10,000 m2 in effective area between declinations of 25 and 90 degrees. Neutrinos generated in the atmosphere by cosmic ray interactions were use...

The neutrino telescope AMANDA has been set up at the geographical South Pole as first step to a neutrino telescope of the scale of one cubic kilometer, which is the canonical size for a detector sensitive to neutrinos from Active Galactic Nuclei (AGN), Gamma Ray Bursts (GRB) and Topological Defects (TD). The location and depth in which the detector...

Diese Arbeit beschreibt die Entwicklung einer Methode zur Energierekonstruktion von Myonen in Unterwasserteleskopen unter Verwendung der Amplituden und Trefferwahrscheinlichkeiten der Photomultiplier. Die Methode wird auf die Daten des Myon- und Neutrinoteleskopes NT-96 angewandt. This thesis describes the development of a method for energy reconst...

We present the results of a search for high-energy neutrinos with the Baikal underwater Cherenkov detector NT-96. An upper limit on the diffuse flux of of within neutrino energy range is obtained, assuming an E−2 behavior of the neutrino spectrum.

We review the present status of the Baikal Neutrino Project and present the results of a search for high energy neutrinos with the detector intermediate stage NT-96.

AMANDA is a high-energy neutrino telescope presently under construction at the geographical South Pole. In the Antarctic summer 1995/96, an array of 80 optical modules (OMs) arranged on 4 strings (AMANDA-B4) was deployed at depths between 1.5 and 2 km. In this paper we describe the design and performance of the AMANDA-B4 prototype, based on data co...

We review the present status of the Lake Baikal neutrino experiment and present selected physics results obtained during the consecutive stages of the stepwise upgrade of the detector: from NT-36 to NT-96. The results cover atmospheric muons, neutrino events, neutrinos of very high energy, searches for neutrino events from WIMP annihilation, search...

We review the present status of the Baikal Neutrino Project and present results on upward going atmospheric neutrinos, results of a search for high energy extraterrestrial neutrinos as well as preliminary results of searching for acoustic signals from EAS in water. We describe the moderate upgrade of NT-200 planned for the next years and discuss a...

We present results of an experiment performed in Lake Baikal at a depth of approximately 1 km. The photomultipliers of an underwater neutrino telescope under construction at this site were illuminated by a distant laser. The experiment not only provided a useful cross-check of the time calibration of the detector but also allowed us to determine in...

We present the first neutrino induced events observed with a deep underwater neutrino telescope. Data from 70 days effective life time of the BAIKAL prototype telescope NT-96 have been analyzed with two different methods. With the standard track reconstruction method, 9 clear upward muon candidates have been identified, in good agreement with 8.7 e...