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Transient Science with the Allen Telescope Array

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  1. Transient Science with the Allen Telescope Array Geoff Bower Berkeley

  2. Allen Telescope Array • Large N design • 350 x 6.1m antennas • Sensitivity of the VLA • Continuous frequency coverage • 0.5 to 11.2 GHz • Wide field of view • 3 degrees at 1 GHz • Excellent survey instrument: 17x FOV of VLA • Simultaneous observing with multiple backends • Correlator at 2 frequencies • 32 Phased array beams at 4 frequencies • Joint project of UC Berkeley/SETI Inst. • Prototype for US SKA proposal

  3. ATA Current Status 42 206

  4. Targeted Monitoring Exploits multiple beams Can be done simultaneously with other science Pulsars Gamma-ray burst afterglows Black holes Supernovae Intraday variability Your Favorite Object Here Blind Surveys Exploit survey speed Orphan GRB afterglows New Radio Supernovae Tidally disrupted stars around Massive BHs Stellar radio emission The “Twinkling” Radio Sky Something New! Transient Science with the ATA

  5. Parameter Space is Wide Open ATA 24 Hours

  6. Radio Transient Source Counts ATA-350 40 hours SKA 4 hours

  7. FiGSS: Five GHz Sky Survey (ATA-42) 5 GHz 1 mJy rms 104 square degrees/6 months Deep Survey (ATA-350) 5 GHz 50 microJy rms 20 square degrees/day All Sky Low Frequency Survey (ATA-350) 700 MHz 250 microJy rms 104 square degrees/day Long Period Pulsar/Transient Survey (ATA-42) Any frequency 10 msec – 1000 sec Targeted: Galactic Center, Globular Cluster, Andromeda ATA Transient Surveys

  8. VLA Archive Transient Survey • 10 years • 20 epochs • 5 GHz • 20 microJansky rms/epoch • 80 sources • 20 suitable for transient study

  9. Transient?

  10. Technical & Scientific Issues • Wide field imaging • Automated imaging • Multiwavelength follow-up & simultaneity

  11. Multiwavelength Source Detection