Aql X-1 transition towards the soft (banana) state accompanied by radio/NIR detection

G. R. Sivakoff, J. Miller-Jones, O. Fox, M. Linares, D. Altamirano, D. Russell

Research output: Contribution to journalArticle

Abstract

The currently active neutron star transient and atoll source Aql X-1 (Linares et al., ATEL #2288) has begun the transition from the hard (extreme island) state to the soft (banana) state (Rodriguez et al. ATEL #2299). This transition likely began around 2009 Nov 15 (MJD = 55150). The latest RXTE PCA observation (2009 Nov 17, MJD=55152.17+/-0.02, 2-60 keV fractional rms variability amplitude of ~11% for 0.1-10 Hz) indicates that the source is in the intermediate (island) state.
Original languageEnglish (US)
JournalThe Astronomer's Telegram
Volume2302
StatePublished - Nov 1 2009

Keywords

  • Radio
  • Infra-Red
  • X-ray
  • Request for Observations
  • Binaries
  • Neutron Stars
  • Transients
  • Variables

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