Discovery of a 205.89 Hz accreting-millisecond X-ray pulsar in the globular cluster NGC 6440 (2009)
Altamirano, D., Patruno, A., Heinke, C., Markwardt, C., Strohmayer, T., Linares, M., ...
We report the discovery of the second accreting millisecond X-ray pulsar (AMXP) in the globular cluster NGC 6440. Pulsations with a frequency of 205.89 Hz were detected with the Rossi X-Ray Timing...
Discovery of a Second Transient Low-Mass X-ray Binary in the Globular Cluster NGC 6440 (2009)
Heinke, C. O., Altamirano, D., Cohn, H. N., Lugger, P. M., Budac, S. A., Servillat, M., ...
We have identified a new transient luminous low-mass X-ray binary, NGC 6440 X-2, with Chandra/ACIS, RXTE/PCA, and Swift/XRT observations of the globular cluster NGC 6440. The discovery outburst (July...
What burns unstably on the neutron star of 4U 0614+091? (2009)
Kuulkers, E., Levine, A. M., Brandt, S., Smith, D. A., ...
The LMXB 4U 0614+091 is a source of sporadic thermonuclear (type I) X-ray bursts. In serendipitous wide-field X-ray observations by EURECA/WATCH, RXTE/ASM, BeppoSAX/WFC, HETE-2/FREGATE,...
Altamirano, D., Linares, M., Patruno, A., Degenaar, N., Wijnands, R., Klein-Wolt, M., ...
We present a detailed study of the X-ray energy and power spectral properties of the neutron star transient IGR J17191-2821. We discovered four instances of pairs of simultaneous kilohertz...
The disc-jet coupling in the neutron star X-ray binary Aquila X-1 (2009)
Tudose, V., Fender, R. P., Linares, M., Maitra, D.
We study the accretion/ejection processes (i.e. disc/jet coupling) in the neutron star X-ray binary Aquila X-1 via a multi-wavelength approach. We use in the radio band the publicly available VLA...
Broad relativistic iron emission line observed in SAX J1808.4-3658 (2009)
Cackett, E. M., Altamirano, D., Patruno, A., Miller, J. M., Reynolds, M., Linares, M., ...
During the September-October 2008 outburst of the accreting millisecond pulsar SAX J1808.4-3658, the source was observed by both Suzaku and XMM-Newton approximately 1 day apart. Spectral analysis...
Timing the accretion flow around accreting millisecond pulsars (2009)
At present, ten years after they were first discovered, ten accreting millisecond pulsars are known. I present a study of the aperiodic X-ray variability in three of these systems, which led to the...
Broad relativistic iron line observed in SAX J1808.4-3658 by Suzaku (2008)
Cackett, E., Altamirano, D., Miller, J., Reynolds, M., Blum, J., Linares, M., ...
The accreting millisecond X-ray pulsar SAX J1808.4-3658 recently exhibited another outburst in September and October 2008 (ATel #1728). During this outburst, on 2008 Oct 2, we obtained a ~40 ks...
Timing and spectral properties of the accreting millisecond pulsar SWIFT J1756.9-2508 (2008)
Linares, M., Wijnands, R., Klis, M. Van Der, Krimm, H., Markwardt, C.B., Chakrabarty, D.
SWIFT J1756.9–2508 is one of the few accreting millisecond pulsars (AMPs) discovered to date. We report here the results of our analysis of its aperiodic X-ray variability, as measured with the...
Near-IR and optical observations of the ongoing outburst of SAX J1808.4-3658 (2008)
Maitra, D., Buxton, M., Tourtellotte, S., Altamirano, D., Patruno, A., Casella, P., ...
Following the report of a new outburst of the accreting millisecond pulsar SAX J1808.4-3658 by Markwardt and Swank (ATel #1728), the source was observed using the CTIO/SMARTS 1.3m telescope on MJD...
Swift detects increased activity of the neutron star transient SAX J1750.8-2900 (2008)
Linares, M., Degenaar, N., Wijnands, R., Altamirano, D.
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 to study its transition to quiescence....
Renewed optical and X-ray activity in IGR J00291+5934 (2008)
Lewis, F., Linares, M., Russell, D.M., Wijnands, R., Roche, P.
We report a re-brightening of the millisecond X-ray pulsar IGR J00291+5934. In August the source performed an outburst which was detected in X-ray, UV and optical (ATel #1660, #1664, #1665, #1666,...
SAX J1750.8-2900 is returning to quiescence (2008)
Linares, M., Degenaar, N., Altamirano, D., Wijnands, R., Klis, M. Van Der, Markwardt, C.
The neutron star transient SAX J1750.8-2900 has been in outburst since March 15th, 2008 (ATel #1425). The X-ray flux started to decay around mid May and fell below the detection threshold of RXTE-ASM...
A WSRT radio observation of IGR J00291+5934 in outburst (2008)
Linares, M., Tudose, V., Migliari, S.
Following the recent reports of activity (ATels #1660, #1664, #1665, #1666) we observed the field of IGR J00291+5934 with the Westerbork Synthesis Radio Telescope (WSRT). The observation was made at...
The cooling tail of a long X-ray burst from XTE J1701-407 (2008)
Linares, M., Soleri, P., Curran, P., Wijnands, R., Degenaar, N., Klis, M. Van Der, ...
Swift XRT observed the recently discovered source XTE J1701-407 (Markwardt et al., ATel #1569, Degenaar et al., ATel #1572) on July 17th, 2008 at UT 13:31:45, 97 seconds after the Swift-BAT detection...
Faulkes Telescope monitoring of the current outburst of IGR J00291+5934 (2008)
Russell, D.M., Lewis, F., Linares, M., Roche, P., Maitra, D.
As part of an optical monitoring project of low-mass X-ray binaries (Lewis et al. 2008, http://adsabs.harvard.edu/abs/2008AIPC.1010..204L), we report on recent observations just prior to, and during...
Radio non-detection of SAX J1808.4-3658 (2008)
Tudose, V., Tzioumis, T., Maitra, D., Linares, M., Patruno, A., Russell, D., ...
We have observed the accreting millisecond X-ray pulsar SAX J1808.4-3658 in its current outburst (ATel #1728, #1732, #1733) in the radio band with the Australia Telecope Compact Array (ATCA) on 2008...
Improved position of the new X-ray transient XTE J1637-498 (2008)
Wijnands, R., Linares, M., Degenaar, N., Markwardt, C.B.
Following the discovery of the new X-ray transient XTE J1637-498 (Atel #1699), we obtained a short (nearly 1 ksec) observation using the Swift/XRT in PC mode on 2008-09-04 at 18:15 UT. We detected...
A New Technique for Noise-Tolerant Pipelined Dynamic Digital Circuits (2007)
F. Mendoza-Hernandez, M. Linares, V. H. Champac, A. Diaz-Sanchez
Noise issues are becoming a main concern in digital systems due to the aggressive scaling trends in devices and interconnections. To address this problem in this paper we present a new noisetolerant...
Martínez, A., Díaz, A., Linares, M., Vega, J.
En este trabajo se presenta una arquitectura simple y rápida para compresión fractal de imágenes basada en un método para compresión fractal multi-resolución de imagen, utilizando...
A Swift/XRT observation of Aql X-1 during its recent outburst (2006)
Wijnands, R.A.D., Maitra, D., Bailyn, C., Linares, M.
We report on an observation performed with the Swift/XRT of the neutron-star X-ray transient Aql X-1 which was recently found to start a new outburst as inferred from an increase in source luminosity...
Correction to ATEL 871: A Swift/XRT observation of Aql X-1 during its recent outburst (2006)
Wijnands, R.A.D., Maitra, D., Bailyn, C., Linares, M.
In ATEL #871 the fluxes were incorrectly quoted. All the fluxes should be multiplied by 1E-10 in order to obtain the correct values. The quoted luminosities are correct since the right fluxes were...
Cooling of the quasi-persistent neutron star X-ray transients KS 1731-260 and MXB 1659-29 (2006)
Cackett, E.M., Wijnands, R.A.D., Linares, M., Miller, J.M., Homan, J., Lewin, W.H.G.
We present Chandra and XMM-Newton X-ray observations that monitor the neutron star cooling of the quasi-persistent neutron star X-ray transients KS 1731-260 and MXB 1659-29 for approximately 4 yr...
Cooling of Accretion Heated Neutron Star Transients (2006)
Cackett, E.M., Wijnands, R.A.D., Linares, M., Miller, J.M., Homan, J., Lewin, W.H.G.
Some neutron star X-ray transients (the quasi-persistent transients) spend an unusually long time in outburst, with outbursts lasting years to decades rather than the usual weeks to months. During...
ALICE Technical Design Report on Forward Detectors : FMD, T0 and V0 (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
ALICE Technical Design Report of the Computing (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
ALICE Technical Design Report on Forward Detectors : FMD, T0 and V0 (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
ALICE Technical Design Report of the Computing (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
Historical demography of Mullerian mimicry in the neotropical Heliconius butterflies (2004)
Flanagan, N. S., Tobler, A., Davison, A., Pybus, O. G., Kapan, D. D., Planas, S., ...
Hybrid sterility, Haldane's rule and speciation in Heliconius cydno and H. melpomene (2002)
Naisbit, R.E., Jiggins, C.D., Linares, M., Salazar, C., Mallet, J.
Most genetic studies of Haldane's rule, in which hybrid sterility or inviability affects the heterogametic sex preferentially, have focused on Drosophila. It therefore remains unclear to what extent...
Dynamic Logic Styles with Improved Noise-Immunity (2002)
F. Mendoza-Hernandez, M. Linares, V. H. Champac
Noise issues are becoming an important concern in digital systems due to the aggressive scaling trends in devices and interconnections. To address this problem a new noise-tolerant dynamic circuit...
The Genetics of the Mimetic Coloration in the Butterfly Heliconius cydno weymeri (1996)
The genetic bases of the wing color pattern in the neotropical butterfly Heliconius cydno weymeri were investigated. Evidence from F1 broods of wild-caught females indicates that the studied...
Historical demography of Müllerian mimicry in the neotropical Heliconius butterflies
Flanagan, N. S., Tobler, A., Davison, A., Pybus, O. G., Kapan, D. D., Planas, S., ...
We compare the historical demographies of two Müllerian comimetic butterfly species: Heliconius erato and Heliconius melpomene. These species show an extensive parallel geographic divergence in...
Historical demography of Müllerian mimicry in the neotropical Heliconius butterflies
Flanagan, N. S., Tobler, A., Davison, A., Pybus, O. G., Kapan, D. D., Planas, S., ...
We compare the historical demographies of two Müllerian comimetic butterfly species: Heliconius erato and Heliconius melpomene. These species show an extensive parallel geographic divergence in...