21.
BSSDATA - Protótipo de um sistema otimizado para tratamento e análise de dados do brasilian solar spectroscope - André Ricardo Fazanaro Martinon
Este trabalho propõe um sistema otimizado para tratamento e análise de dados em radioastronomia solar, específico para o Espectrógrafo Solar BSS Brazilian Solar Spectroscope, INPE. Este sistema constitui uma extensão do software BSSData, desenvolvido anteriormente. No presente trabalho foi implementada a BSSLibrary, uma biblioteca otimizada de rotinas para manipulação dos dados, ainda em desenvolvimento, tendo sido completadas as rotinas de filtragem de imagens. A otimização foi feita através do uso de instruções de linguagem de máquina vetoriais, típicas dos processadores IA32 atuais. Essa biblioteca foi implementada na forma de uma Dynamic Link Library (DLL) de forma a compor um módulo...
22.
Flares from a candidate Galactic magnetar suggest a missing link to dim isolated neutron stars - Castro-Tirado, Alberto J.; Ugarte Postigo, A. de; Gorosabel, J.; Jelínek, M.; Fatkhullin, T. A.; Sokolov, V. B.; Ferrero, P.; Kann, D. A.; Klose, S.; Sluse, D.; Bremer, M.; Winters, J. M.; Nuernberger, D.; Pérez-Ramírez, D.; Guerrero, M. A.; French, J.; Melady, G.; Hanlon, L.; McBreen, B.; Leventis, K.; Markoff, S. B.; Leon, S.; Kraus, A.; Aceituno, F. J.; Cunniffe, R.; Kubánek, P.; Vítek, S.; Schulze, S.; Wilson, A. C.; Hudec, R.; Durant, M.; González-Pérez, J. M.; Shahbaz, T.; Guziy, S.; Pandey, S. B.; Pavlenko, L.; Sonbas, E.; Trushkin, S. A.; Bursov, N. N.; Nizhelskij, N. A.; Sánchez-Fernández, C.; Sabau-Graziati, L.
This work is based on observations carried out with the 0.3-m robotic telescope at the Spanish BOOTES-2 astronomical station of the Estación Experimental de La Mayora (CSIC), the 0.4-m WATCHER telescope operated by UCD at Boyden Observatory (South Africa), the 0.8-m IAC telescope at the Spanish Observatorio de Izaña of the Instituto de Astrofísica de Canarias (IAC), the 1.2-m Mercator telescope operated by the Flemish Community at the Spanish Observatorio del Roque de los Muchachos of the IAC, the 1.34-m telescope at the Tautenburg Observatory (Germany), the 1.5-m OSN telescope at the Spanish Observatorio de Sierra Nevada of the Instituto...
23.
International Conference on Engineering Education August 6 -- 10, 2001 Oslo, Norway Project Embla - Bjrn Gitle Hauge
The Embla project was born in 1998 as a joint
research program between Istituto di Radioastronomia,
Bologna, Italy and stfold College, Norway. This project is
carried out by scientists and engineering students from Italy
and Norway. The goal of project Embla is to study the
electromagnetic behavior of the unexplained luminous
phenomena occurring in the atmosphere in a remote
Norwegian valley, Hessdalen. Since this phenomena shows a
random type of behavior and appearance, it was necessary
for scientists to establish contact with engineers that could
develop fully automated surveillance systems. This program
has become a big inspiration for engineering students that
motivates them to combine science and engineering. The
motivation is based upon...
24.
High Resolution Imaging of Circumstellar Disks at Millimeter Wavelengths - Wilner, David J.
We update progress on our research program to use high angular resolution imaging of thermal dust continuum emission at millimeter and submillimeter wavelengths to probe the structure of protoplanetary disks and debris disks around nearby stars. Observations at these wavelengths are advantageous because the dust emission is generally optically thin and directly proportional to mass, contrast with stellar photospheres is not problematic, and the wavelength dependence provides information on an important regime of grain sizes. We employ several facilities for state-of-the-art high resolution observations, including the Very Large Array (VLA), the Australia Telescope Compact Array (ATCA), the Plateau de Bure...
25.
Library & Information Services: an Astronomer’s Wishlist - Heinz Andernach
Abstract. I review some of the past and current methods for retrieval of literature and other published information, excluding commercial services. Much of this is a personal view and based on experience made at various institutions, some of them neither with an adequately complete astronomy library, nor with a professional astronomy librarian. Rather than describing current retrieval methods, a few of their weaknesses are identified which merit future improval. Despite the availability of powerful electronic tools, we need to improve efforts in safeguarding published numerical and textual information in a format readily usable by astronomers. Comments are made on a...
26.
International Conference on Engineering Education August 6 -- 10, 2001 Oslo, Norway Project Embla - Bjrn Gitle Hauge
The Embla project was born in 1998 as a joint research program between Istituto di Radioastronomia, Bologna, Italy and stfold College, Norway. This project is carried out by scientists and engineering students from Italy and Norway. The goal of project Embla is to study the electromagnetic behavior of the unexplained luminous phenomena occurring in the atmosphere in a remote Norwegian valley, Hessdalen. Since this phenomena shows a random type of behavior and appearance, it was necessary for scientists to establish contact with engineers that could develop fully automated surveillance systems. This program has become a big inspiration for engineering students...
27.
The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data
release of the combined LDS and IAR surveys with improved stray-radiation
corrections - Kalberla, P. M. W.; Burton, W. B.; Hartmann, Dap; Arnal, E. M.; Bajaja, E.; Morras, R.; Poppel, W. G. L.
We present the final data release of observations of lambda 21-cm emission
from Galactic neutral hydrogen over the entire sky, merging the
Leiden/Dwingeloo Survey (LDS: Hartmann & Burton, 1997) of the sky north of
delta = -30 deg with the Instituto Argentino de Radioastronomia Survey (IAR:
Arnal et al., 2000, and Bajaja et al., 2005) of the sky south of delta = -25
deg. The angular resolution of the combined material is HPBW ~ 0.6 deg. The LSR
velocity coverage spans the interval -450 km/s to +400 km/s, at a resolution of
1.3 km/s. The data were corrected for stray radiation at the Institute for
Radioastronomy of the...
28.
A New Water Vapor Megamaser - Cernicharo, José; Pardo Carrión, Juan Ramón; Weiss, Axel
We report on the detection of a new megamaser, the 3_1,3–2_2,0 H2O line (v0 = 183.310 GHz) in Arp 220, using the Institut de Radioastronomie Millimétrique (IRAM) 30 m telescope. The line is about 350 km s^-1 wide with a total luminosity of ∼2.5x10^8 K km s^-1 pc2. Although OH megamasers were first discovered in this source, no emission is seen in the 6_1,6–5_2,3 H2O transition (v0=22.235 GHz), a line otherwise detected as a megamaser in about 50 sources to date. This fact puts interesting constraints on the physical conditions of the central region of Arp 220 that are further...
29.
New Molecules Found in Comet C/1995 O1(Hale-Bopp) Investigating the Link Between Cometary and Interstellar Material - Bockelee-Morvan, D.; Lis, D. C.; Wink, J. E.; Despois, D.; Crovisier, J.; Bachiller, R.; Benford, D. J.; Biver, N.; Colom, P.; Davies, J. K.
We present millimetre and submillimetre observations of comet C/1995 (Hale-Bopp) undertaken near perihelion with the Caltech Submillimeter Observatory and the 30m telescope and Plateau-de-Bure interferometer of the Institut de Radioastronomie Millimetrique. From a spectral molecular survey, six new cometary molecular species have been identified for the first time in a comet: SO, SO2, HC3N, NH2CHO, HCOOH, and HCOOCH3. Relative abundances with respect to water are 0.3% (SO), 0.2% (SO2),0.02% (HC3N), 0.01-0.02% (NH2CHO), 0.09% (HCOOH), and 0.08% (HCOOCH3). Several rotational transitions of OCS and HNCO, whose first identifications were made previously in comet C/1996 B2 (Hyakutake), have also been detected, confirming...
30.
High Resolution Imaging of Circumstellar Disks at Millimeter Wavelengths - Wilner, David J.
Our program uses the techniques of millimeter interferometry to make high resolution observations of dust continuum emission to study the structure of protoplanetary disks and debris disks around nearby stars. Observations of dust emission at these wavelengths are advantageous because the dust emission is generally optically thin and directly proportional to mass, and contrast with stellar photospheres is not a problem. We are using of several observational facilities, including (1) the Very Large Array (VLA) of the National Radio Astronomy Observatories, (2) the Plateau de Bure Interferometer (PdBI) of the Institut de RadioAstronomie Millimetrique, and (3) the Submillimeter Array (SMA),...
31.
Orbital variability of the PSR J2051-0827 Binary System - Doroshenko, O.; Loehmer, O.; Kramer, M.; Jessner, A.; Wielebinski, R.; Lyne, A. G.; Lange, Ch.
We have carried out high-precision timing measurements of the binary
millisecond pulsar PSR J2051$-$0827 with the Effelsberg 100-m radio telescope
of the Max-Planck-Institut f\"ur Radioastronomie and with the Lovell 76-m radio
telescope at Jodrell Bank. The 6.5-yrs radio timing measurements have revealed
a significant secular variation of the projected semi-major axis of the pulsar
at a rate of $\dot x\equiv d(a_{\rm 1} \sin i)/dt = (-0.23\pm 0.03)\times
10^{-12}$, which is probably caused by the Newtonian spin-orbit coupling in
this binary system leading to a precession of the orbital plane. The required
misalignment of the spin and orbital angular momenta of the companion are
evidence for an asymmetric supernova explosion....
32.
Intercontinental Bistatic Radar Test Observation of Asteroid 1998 WT24 - Righini, S.; Poppi, S.; Montebugnoli, S.; DiMartino, M.; Saba, L.; Delbo, M.; Ostro, S.; Monari, J.; Poloni, M.; Orlati, A.
We describe the first intercontinental planetary radar test performed in Italy observing the near Earth asteroid (NEA) 33342 (1998 WT24) in December 2001 by means of the bistatic configurations Goldstone (California, USA)-Medicina (Italy) and Evpatoria (Ukraine)-Medicina. The experiment goal was to characterize the system for realtime radar follow-up observations of NEAs and artificial orbiting debris, in the framework of a feasibility study which aims at using the Sardinia Radio Telescope, at present under construction, also as a planetary radar facility. We report the preliminary results of the radar observations carried out by the IRA-CNR (Instituto di Radioastronomia - Consiglio Nazionale...
33.
Calibration Validation and Polarimetry in 2D Aperture Synthesis. Application to MIRAS - Ribó Vedrilla, Serni
RESUM
La missió SMOS de l'Agència Europea de l'Espai (ESA) té com a objectiu mesurar la humitat del sòl i la salinitat dels oceans, paràmetres fonamentals per tal d'entendre el canvi climàtic global.
MIRAS (Radiòmetre de microones generador d'imatges pel mètode de síntesi d'obertura) és un tipus d'instrument nou per a l'observació de la terra i és l'únic instrument de la missió SMOS. Consisteix en un agrupació aprimada (thinned array) en forma d'i grega amb 21 elements per braç. Amb aquesta tècnica s'aconsegueixen grans obertures sintètiques amb una massa relativament reduida.
Aquesta nova tecnologia ha estat triada per a la missió SMOS, per...
21.
