Extended Timing Observations of the Accreting Millisecond Pulsar Igr J00291+5934
Accreting millisecond pulsars have played an essential role in the understanding of accretion physics since they were first discovered in 1998 with RXTE. We...
We summarize the main properties of the extended UV (XUV) emission found in roughly 30% of the nearby spiral galaxies observed by the GALEX satellite. Two...
Extending the Methods Used to Calibrate ISO to the GTC
An accurate and traceable photometric calibration is becoming increasingly important for large telescopes if they are to reach their full potential. The...
Extension of the Ca II Triplet Calibration as a Metallicity Indicator to Young and/or Metal-rich Systems: Application to the LMC
The Ca II triplet is one of the most frequently measured features for deriving stellar metallicities from moderate resolution spectroscopy of red giants in old...
Extension of the Virasoro and Neveu-Schwartz algebras and generalized Sturm-Liouville operators
We consider the universal central extension of the Lie algebra $Vect (S^1)${math s}$ C^{infty}(S^1)$. The coadjoint representation of this Lie algebra has a...
Extensions and contractions of the Lie algebra of q-pseudodifferential symbols
We construct cocycles on the Lie algebra of pseudo- and q-pseudodifferential symbols of one variable and on their close relatives: the sine-algebra and the...
Extensions of Virasoro group and Virasoro algebra by modules of tensor-densities on $S^1$
We classify non-trivial (non-central) extensions of the group $Diff^+(S^1)$ of all diffeomorphisms of the circle preserving its orientation and of the Lie...