Roberto Mignani

A closer look at the X-ray transient XTE J1908+094: identification of two new near-infrared candidate counterparts (2005)

Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca

We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...

A closer look at the X-ray transient XTE J1908+094: identification of two new near-infrared candidate counterparts (2005)

Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca

We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...

A Multi-wavelength study of the Pulsar PSR B1929+10 and its X-ray trail (2005)

Becker, Werner, Kramer, Michael, Jessner, Axel, Taam, Ronald E., Jia, Jian J., Cheng, Kwong S., ...

We report on the emission properties of PSR B1929+10 and its putative X-ray trail from a multi-wavelength study performed with XMM-Newton, the ESO NTT, the HST, the Effelsberg 100m Radio Telescope...

Discovery and Monitoring of the likely IR Counterpart of SGR 1806-20 during the 2004 gamma-ray burst-active state (2005)

Israel, GianLuca, Covino, Stefano, Mignani, Roberto, Stella, Luigi, Marconi, Gianni, Testa, Vincenzo, ...

The sky region including the Chandra position of SGR 1806-20 was monitored in the IR band during 2004, following its increased high energy bursting activity. Observations were performed using...

A new pseudo-Kaluza-Klein scheme for geometrical description of interactions (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

We illustrate the main features of a new Kaluza-Klein-like scheme (Deformed Relativity in five dimensions). It is based on a five-dimensional Riemannian space in which the four-dimensional space-time...

The electron mass from Deformed Special Relativity (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

Deformed Special Relativity (DSR) is a generalization of Special Relativity based on a deformed Minkowski space, i.e. a four-dimensional space-time with metric coefficients depending on the energy....

A geometrical meaning to the electron mass from breakdown of Lorentz invariance (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

We discuss the problem of the electron mass in the framework of Deformed Special Relativity (DSR), a generalization of Special Relativity based on a deformed Minkowski space (i.e. a four-dimensional...

Killing symmetries of generalized Minkowski spaces. 3-Space-time translations in four dimensions (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

In this paper, we continue the study of the Killing symmetries of a N-dimensional generalized Minkowski space, i.e. a space endowed with a (in general non-diagonal) metric tensor, whose coefficients...

Killing symmetries of generalized Minkowski spaces. 2-Finite structure of space-time rotation groups (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

In this paper, we continue the study of the Killing symmetries of a N-dimensional generalized Minkowski space, i.e. a space endowed with a (in general non-diagonal) metric tensor, whose coefficients...

Killing symmetries of generalized Minkowski spaces. 1-Algebraic-infinitesimal structure of space-time rotation groups (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

In this paper, we introduce the concept of N-dimensional generalized Minkowski space, i.e. a space endowed with a (in general non-diagonal) metric tensor, whose coefficients do depend on a set of...

Boosts in an arbitrary direction and maximal causal velocities in a deformed Minkowski space (2005)

Cardone, Fabio, Marrani, Alessio, Mignani, Roberto

We discuss boosts in a deformed Minkowski space, i.e. a four-dimensional space-time with metric coefficients depending on non-metric coordinates (in particular on the energy). The general form of a...

A closer look at the X-ray transient XTE J1908+094: identification of two new near-infrared candidate counterparts (2005)

Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca

We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...

A closer look at the X-ray transient XTE J1908+094: identification of two new near-infrared candidate counterparts (2005)

Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca

We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...

Multiwavelength Study Of Two Unidentified Gamma-ray Sources (2004)

La Palombara, Nicola, Caraveo, Patrizia, Mignani, Roberto, Hatziminaoglou, Evanthia, Bignami, Giovanni F., Schirmer, Mischa

Most counterparts of the identified low-latitude gamma-ray sources are Isolated Neutron Stars (INSs). They are characterized by an extremely high value of the X/optical flux ratio, therefore a...

Unveiling the multi-wavelength phenomenology of Anomalous X-ray Pulsars (2003)

Israel, GianLuca, Stella, Luigi, Covino, Stefano, Campana, Sergio, Angelini, Lorella, Mignani, Roberto, ...

During 2002-2003 the number of IR-identified counterparts to the Anomalous X-ray Pulsars (AXPs) has grown to four (4U0142+614, 2E2259+584, 1E 1048-59 and 1RXS J170849-400910) out of the six assessed...

On the solutions of the Cartan equation in Metric Affine Gravity (2000)

Mignani, Roberto, Scipioni, Roberto

In the Tucker-Wang approach to Metric Affine gravity we review some particular solutions of the Cartan equation for the non-riemannian part of the connection. As application we show how a quite...

A Taxonomic Overview of the Genus PSEUDOATHYREUS Howden and Martinez, and Redescription of Two Related Species from Southern Africa (Coleoptera: Geotrupidae: Bolboceratinae) (2000)

Giuseppe M. Carpaneto, Roberto Mignani, Emanuele Piattella

A group of two closely related species from the southern part of the Afrotropical Region is defined within the Afro-Indian genus Pseudoathyreus. It includes P. rhodesianus Peringuey from southern...

Non-Invariant Ground States, Thermal Average, and generalized Fermionic Statistics (1999)

Mignani, Roberto, Scipioni, Roberto

We present an approach to generalised fermionic statistics which relates the existence of a generalised statistical behaviour to non-invariant ground states. Considering the thermal average of an...

On the Crab Proper Motion (1998)

CARAVEO, PATRIZIA A., MIGNANI, ROBERTO

Owing to the dramatic evolution of telescopes as well as optical detectors in the last 20 yrs, we are now able to measure anew the proper motion of the Crab pulsar, after the classical result of...

Pre-Supernova Ring Around PSR0540-69 (1998)

Caraveo, Patrizia A., Mignani, Roberto, Bignami, Giovanni F.

SNR0540-69 is a supernova remnant in the LMC, harbouring a young (~1600 yrs) radio/optical/X-ray pulsar (P=50 ms). Ground based Halpha imaging of the region has shown a unique spiral-like structure...