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9 papers · 1 filter
Postnikov Invariants of Crossed Complexes
M. Bullejos, E. Faro, M. A. García-Muñoz
We determine the Postnikov Tower and Postnikov Invariants of a Crossed Complex in a purely algebraic way. Using the fact that Crossed Complexes are homotopy types for filtered spac…
Optical polarimetric observations of the microquasar LS 5039
J. A. Combi, S. A. Cellone, J. Marti +3
We present the first optical polarimetric observations of the runaway microquasar LS 5039. Our results reveal the presence of a large amount (~5%) of polarized emission towards thi…
Towards a population of HMXB/NS microquasars as counterparts of low-latitude unidentified EGRET sources
M. Ribo, J. A. Combi, I. F. Mirabel
The discovery of the microquasar LS 5039 well within the 95% conficence contour of the Unidentified EGRET Source (UES) 3EG J1824-1514 was a major step towards the possible associat…
On the nature of the unidentified X-ray/gamma-ray sources IGR J18027-1455 and IGR J21247+5058
J. A. Combi, M. Ribo, I. F. Mirabel
We present a multiwavelength study of the environment of the unidentified X-ray/gamma-ray sources IGR J18027-1455 and IGR J21247+5058, recently discovered by the IBIS/ISGRI instrum…
Results of a search for new microquasars in the Galaxy
M. Ribo, J. M. Paredes, J. Marti +5
We present here the results of a search for new microquasars at low galactic latitudes, based on a cross-identification between the ROSAT all sky Bright Source Catalog (RBSC) and t…
Optical spectroscopy of microquasar candidates at low galactic latitudes
J. Marti, J. M. Paredes, J. S. Bloom +3
We report optical spectroscopic observations of a sample of 6 low-galactic latitude microquasar candidates selected by cross-identification of X-ray and radio point source catalogs…