Data and considerations are presented about the sustainability of astronomical observatories in the Spanish territory. While still not comparable to other...
Swift detects an X-ray burst and renewed activity from KS 1741-293
An X-ray burst from the direction of the neutron star (NS) transient and thermonuclear burster KS 1741-293 triggered the Swift-BAT on 2011-09-01 at 12:07:22 UTC...
Swift detects increased activity of the neutron star transient SAX J1750.8-2900
After our report on the flux decay of the neutron star transient SAX J1750.8-2900 (ATel #1662) we have continued monitoring the source with Swift-XRT in order...
Following the gamma-ray, VHE (E>100 GeV) flare of the blazar 1ES 0806+525 (RA:08h09m49.2s DEC:+52d18m58.2s, z=0.138) detected by MAGIC on 2011 February 25 (ATel...
SWIFT J052522.48+241331.8 (=1RXS J052523.2+241331) is a Cataclysmic Variable
We report optical spectroscopy of the putative optical counterpart to the Swift source J052522.48+241331.8 (Page, Tueller & Beardmore 2007, ATEL #1279). We note...
SWIFT J1749.4-2807: X-ray decay, refined position and optical observation
We analyzed seven, target ID 31686, Swift follow-up observations of the neutron-star X-ray transient Swfit J1749.4-2807 (Wijnands et al. 2009) currently in...
SWIFT J1753.5-0127: orbital period, high-frequency timing analysis and multi-band observations.
We have conducted an extensive observational campaign of SWIFT J1753.5-0127 over the last year, since its bright our-burst episode in 2005. Using long time...