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10 papers · 1 filter
The GRB 030329 host: a blue low metallicity subluminous galaxy with intense star formation
J. Gorosabel, D. Pérez-Ramírez, J. Sollerman +13
We present broad band photometry and spectroscopic observations of the host galaxy of GRB 030329. Analysis of the spectral emission lines shows that the host is likely a low metall…
Orbital X-Ray Variability of the Microquasar LS 5039
V. Bosch-Ramon, J. M. Paredes, M. Ribo +3
The properties of the orbit and the donor star in the high mass X-ray binary microquasar LS 5039 indicate that accretion processes should mainly occur via a radiatively driven wind…
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…