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X-ray Transient Surveys

X-ray Transient Surveys. Daryl Haggard Greg Sivakoff. Schematic of Variables/Transients. Variable Disks. Tidal Disruptions. Tidal Disruptions. Winds and Jets. Disks & Jets. Stellar Flares. SNe /GRB. Mergers/GRB. Mostly X-ray viewpoint. Eyer , et al. 2008 Mahabal , this meeting.

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X-ray Transient Surveys

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  1. X-ray Transient Surveys Daryl Haggard Greg Sivakoff

  2. Schematic of Variables/Transients Variable Disks Tidal Disruptions Tidal Disruptions Winds and Jets Disks & Jets Stellar Flares SNe/GRB Mergers/GRB Mostly X-ray viewpoint Eyer, et al. 2008 Mahabal, this meeting

  3. X-ray Time Domain Desirati Discovery & Monitoring Rapid Response High Time Resolution • All Sky Monitor • MAXI/AstroSAT/ JANUS (need more sensitivity), LOFT • Science drivers: GRBs, SNeshock breakout, accretion physics, tidal disruptions • ~Daily Cadence • Rapid slew (< hr) • Swift, AstroSAT, LOFT, a suite of Swifts!? • Science drivers: GRBs, stellar flares/space weather, transient response • High Availability • Sub-ms timing • AstroSAT, Athena,LOFT? • Science drivers: Strong gravity, neutron star physics, XRB physics, QPOs • High Sensitivity

  4. Overview • X-ray photons assigned arrival time, energy, and sky position • sensitive, energy-dependent light curves • time-resolved spectroscopy • Baselines span • 10 orders of magnitude at spatial resolutions of arcseconds • 13 orders of magnitude at spatial resolutions of a degree • High energy time domain data indicate variability in • AGN • Galactic center sources • X-ray binaries • Supernovae • Classical novae, recurrent novae • Magnetars • GRBs • Stellar flares • As-yet unknown X-ray variables

  5. X-ray Missions Planned/Proposed • NuSTAR • AstroSAT • eROSITA • GEMS • ASTRO-H • Athena • LOFT • WFXT • JANUS • EXIST Active (+Archival) • Chandra • XMM • Swift • INTEGRAL • MAXI • Suzaku Archival • RXTE • ROSAT

  6. The Case for X-ray Transients • What are the most compelling science cases for current and future X-ray transient studies? • What efforts does the X-ray transient community need to undertake to best lobby for the importance of X-ray transient studies (past and present) to the general astronomical community?

  7. Resource Utilization • How will new planned or soon to be launched instruments support X-ray transient surveys? • What inventive ways can we develop to utilize new instruments that may not be originally designed for X-ray transient studies? • What steps do we need to take to transition from the era of RXTE to the era without it? • What important lessons have we learned from RXTE?

  8. Multiwavelength Coordination • How do we best coordinate multi-wavelength observations, especially for X-ray transient surveys? • Do we need to develop an X-ray Transient Network or are existing infrastructures like The Gamma-ray Circular Network and the Astronomers Telegram sufficient? • What cadences are needed to achieve various science priorities at different wavelengths? • Are there opportunities for citizen science with X-ray transient surveys?

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