Accepted NuSTAR Programs through the Swift Proposal Selection ProcessAccepted NuSTAR Programs through Swift Cycle 14Proposal Number: 1417159PI Last Name: Vestergaard Title: ToO monitoring of the re-awakening AGN in MRK590: Catching the monster in the act! Abstract: After a 10-year hiatus, Mrk590 appears to be rekindling its nuclear activity! Existing Swift data strongly suggest that the AGN is likely to turn on again in the near future. We wish to seize this rare and fortuitous opportunity to document, for the first time ever, the onset of AGN activity since this can lead to significant insight on the long-standing issue of how AGNs are fueled. Once triggered by another program (PI:Vestergaard) we ask to first observe Mrk590 ~daily with Swift for up to 60 days and then for 5 ~bi-weekly follow-up observations to establish if Mrk590 has entered a stable high or low flux state. We also ask for two 20ks NuSTAR observations to place tighter constraints on the potential emergence of a weak soft X-ray component and perhaps a high-energy reflection component.
Accepted NuSTAR Programs through Swift Cycle 15No programs selected.
Accepted NuSTAR Programs through Swift Cycle 16Proposal Number: 1619004PI Last Name: Satalecka Title: OBSERVATIONS OF THE MULTIMESSENGER BLAZAR TXS 0506+056 WITH SWIFT, NUSTAR AND MAGIC Abstract: There exist compelling evidence for a correlation of the high energy IceCube neutrino event IC-170922A and the blazar TXS 0506+056 observed in its flaring state by instruments spanning the whole electromagnetic spectrum. This object is up to date our best candidate for a neutrino and cosmic ray emitting source. We propose regular deep observations of the multi-messenger blazar TXS0506+056 to be preformed together by Swift, NuSTAR and MAGIC, and other MAGIC MWL partners. We ask for 22 5ks Swift observations (110ks in total) and 6 25ks NuSTAR observations (150 ks in total). The proposed Swift and NuSTAR observations are essential to characterise the X-ray emission of this source, which in turn is crucial to understand and distinguish the leptonic and hadronic processes at play.
Accepted NuSTAR Programs through Swift Cycle 17No programs selected.
Accepted NuSTAR Programs through Swift Cycle 18Proposal Number: 1821098PI Name: Kirill Sokolovsky Title: IN SEARCH OF SHOCKS IN NOVAE Abstract: The theory predicts that shocks that power GeV $gamma$-rays in novae should emit most of their energy as X-rays. However the predicted bright X-ray emission was never observed. Whether this lack points to something fundamental about the shock physics, or is simply an issue of small-number statistics, is unclear. We request Swift monitoring (40ks split across 10 epochs) and NuSTAR snapshot (40ks single epoch) of a newly discovered bright Galactic nova to expand the sample of gamma-ray novae with exquisite X-ray light curves. The resulting data will be interpreted alongside multi-wavelength observations to better understand shocks in novae, particularly characterize the luminosity, duration, temperature, location, and absorbing column associated with these shocks.
Accepted NuSTAR Programs through Swift Cycle 19Proposal Number: 1922051PI Name: Liliana Rivera Sandoval Title: INVESTIGATING THE ORIGIN OF FAST-EVOLVING LUMINOUS TRANSIENTS Abstract: In 2018 the discovery of the optical transient AT2018cow was a big breakthrough in the astronomical community given its unprecedented characteristics. It was the first Fast-Evolving Luminous Transient (FELT) to be discovered in real time and extensively studied at all wavelengths, which has led to several interpretations about its origin. Using Swift XRT and UVOT observations, it was determined that AT2018cow was a bright X-ray and UV transient with rapid X-ray variability, with timescales of even a few hours, and a peculiar X-ray spectrum. These characteristics were observed for the first time on a FELT. We propose to investigate the origin of FELTs by exploiting the rapid response and multi band coverage of Swift joined with the great capabilities of NuSTAR and the VLA.
Accepted NuSTAR Programs through Swift Cycle 20Proposal Number: 2023182PI Name: Sara Buson Title: THE X-RAY HADRONIC IMPRINT IN NEUTRINO-EMITTER BLAZARS Abstract: We propose a pilot study to observe with Swift-UVOT/XRT and NuSTAR a well-defined sample of blazars associated with IceCube neutrinos. If these blazars originate neutrinos, they are powered by hadronic processes. Within the blazar hadronic framework, the emission in the X-ray band provides the most sensitive diagnostics of the hadronic contribution to the spectral energy distribution (SED) in these sources. The Swift-UVOT/XRT observations, along with NuSTAR simultaneous spectra, will provide us with broadband, simultaneous multi-wavelength SEDs of the astrophysical objects, that will be tested with theoretical expectations from leptonic and hadronic modelling.
Proposal Number: 2023233
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HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.
- HEASARC Director: Dr. Andy Ptak
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- Last Modified: 19-Apr-2024