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Pohl, M. Santander, N. Korzoun, N. R. Bond, O. Hervet, P. Bangale, P. Kaaret, P. L. Rabinowitz, P. Moriarty, P. T. Reynolds, Q. Feng, R. A. Ong, R. Mukherjee, S. Feldman, S. Filbert, S. Kumar, S. Kundu, S. L. Wong, S. Tandon, T. B. Humensky, The VERITAS Collaboration: A. Archer, T. K. Kleiner, T. Yoshikoshi, W. Benbow, W. Hanlon, W. Jin, Y. Chen","submitted_at":"2026-03-23T15:35:01Z","abstract_excerpt":"Microquasars such as SS 433 are considered potential contributors to cosmic rays up to the knee of the cosmic ray energy spectrum ($\\sim4\\,\\mathrm{PeV}$), where a transition in the dominant acceleration processes is expected. The SS 433 system, located within the W50 supernova remnant, is a Galactic microquasar with relativistic jets interacting with the surrounding medium over parsec scales, providing an example for studying jet-driven particle acceleration. 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Duerr, A. Furniss, A. J. Chromey, A. Pandey, C. E. Hinrichs, D. A. Williams, D. Ribeiro, E. Joshi, E. Pueschel, E. Roache, F. Krennrich, G. H. Sembroski, G. Maier, H. Salzmann, I. Sadeh, J. E. Pedrosa, J. Holder, J. L. Christiansen, J. T. Bartkoske, J. V. Tucci, J. Woo, K. Ragan, L. Saha, M. E. Godoy, M. Errando, M. Iskakova, M. J. Lang, M. Kertzman, M. Kherlakian, M. Lundy, M. N. Johnson, M. Ohishi, M. Pohl, M. Santander, N. Korzoun, N. R. Bond, O. Hervet, P. Bangale, P. Kaaret, P. L. Rabinowitz, P. Moriarty, P. T. Reynolds, Q. Feng, R. A. Ong, R. Mukherjee, S. Feldman, S. Filbert, S. Kumar, S. Kundu, S. L. Wong, S. Tandon, T. B. Humensky, The VERITAS Collaboration: A. Archer, T. K. Kleiner, T. Yoshikoshi, W. Benbow, W. Hanlon, W. Jin, Y. 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