Driver T Li S Champenois EG Duris J Ratner D Lane TJ Rosenberger P Al-Haddad A Averbukh V Barnard T Berrah N Bostedt C Bucksbaum PH Coffee R DiMauro LF Fang L Garratt D Gatton A Guo Z Hartmann G Haxton D Helml W Huang Z LaForge A Kamalov A Kling MF Knurr J Lin MF Lutman AA MacArthur JP Marangos JP Nantel M Natan A Obaid R O'Neal JT Shivaram NH Schori A Walter P Li Wang A Wolf TJA Marinelli A Cryan JP 2020 The recent demonstration of isolated attosecond pulses from an X-ray free-electron laser (XFEL) opens the possibility for probing ultrafast electron dynamics at X-ray wavelengths. An established experimental method for probing ultrafast dynamics is X-ray transient absorption spectroscopy, where the X-ray absorption spectrum is measured by scanning the central photon energy and recording the resultant photoproducts. The spectral bandwidth inherent to attosecond pulses is wide compared to the resonant features typically probed, which generally precludes the application of this technique in the attosecond regime. In this paper we propose and demonstrate a new technique to conduct transient absorption spectroscopy with broad bandwidth attosecond pulses with the aid of ghost imaging, recovering sub-bandwidth resolution in photoproduct-based absorption measurements. https://sonar.ch/global/documents/116051 eng info:eu-repo/semantics/altIdentifier/doi/10.1039/c9cp03951a info:eu-repo/semantics/altIdentifier/pmid/31793561 Physical chemistry chemical physics : PCCP. - 2020 Physical and Theoretical Chemistry General Physics and Astronomy Attosecond transient absorption spooktroscopy: a ghost imaging approach to ultrafast absorption spectroscopy. http://purl.org/coar/resource_type/c_6501