{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KNQXC2P5XV6M57NCA3S5DUJ7TX","short_pith_number":"pith:KNQXC2P5","canonical_record":{"source":{"id":"1510.08358","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-10-28T15:54:48Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8bc26300973eef89c9548152f7dbaaed820e2bc57564b629e928663ab88cbd9e","abstract_canon_sha256":"841037afd628d279ecd293611a7ff4879552d0446a597e4076ad8a9f5503b37a"},"schema_version":"1.0"},"canonical_sha256":"53617169fdbd7ccefda206e5d1d13f9de9204f4c7c8ec0e94116eafe75080add","source":{"kind":"arxiv","id":"1510.08358","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08358","created_at":"2026-05-18T01:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08358v1","created_at":"2026-05-18T01:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08358","created_at":"2026-05-18T01:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"KNQXC2P5XV6M","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KNQXC2P5XV6M57NC","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KNQXC2P5","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KNQXC2P5XV6M57NCA3S5DUJ7TX","target":"record","payload":{"canonical_record":{"source":{"id":"1510.08358","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-10-28T15:54:48Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8bc26300973eef89c9548152f7dbaaed820e2bc57564b629e928663ab88cbd9e","abstract_canon_sha256":"841037afd628d279ecd293611a7ff4879552d0446a597e4076ad8a9f5503b37a"},"schema_version":"1.0"},"canonical_sha256":"53617169fdbd7ccefda206e5d1d13f9de9204f4c7c8ec0e94116eafe75080add","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:22.796781Z","signature_b64":"NUQRP4qMF7gFG8z/kotDAUklRzr/zdx49efSYZYfYo87EZw7f3x1ocOFVGXzuPKYZKe8tq5y2baAwUfiu6mLDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"53617169fdbd7ccefda206e5d1d13f9de9204f4c7c8ec0e94116eafe75080add","last_reissued_at":"2026-05-18T01:23:22.796119Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:22.796119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.08358","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Svl4zC4v9iHvbQxBrXjDKkD34vj4UK2EFLbpWh+pA8qcNrQ2hXD4DLpAGds/fks5zLCX/5JfaKTv9Qc+KKutDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T21:38:48.111544Z"},"content_sha256":"4d6e8978d280a56a9ad74164659ba60a0af3cc1bba369322f338f58645d61fd1","schema_version":"1.0","event_id":"sha256:4d6e8978d280a56a9ad74164659ba60a0af3cc1bba369322f338f58645d61fd1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KNQXC2P5XV6M57NCA3S5DUJ7TX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-Ray Polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.IM","authors_text":"(10) University of Virginia, (11) MPI for Extraterrestrial Physics Garching, (12) Durham University, (13) North Carolina State University, (14) Cambridge, (15) Penn State University, (16) University of California, 17), (17) University of California, (18) ASI Science Data Center, (19) Purdue University, (20) Texas Tech University, (21) Nagoya University, (22) University of Maryland, (23) RIKEN, (24) Univ. of Michigan in Ann Arbor, (25) Harvard-Smithsonian Center for Astrophysics, (26) Istituto di Astrofisica e Planetologia Spaziali, (27) Department of Astronomy/Steward Observatory, (28) Lawrence Livermore National Laboratory, (29) NASA Goddard Space Flight Center, (30) Tohoku University, (3) California Institute of Technology, (4) Anton Pannekoek Institute for Astronomy, (5) Rice University, (6) Georgia College, (7) North-West University, (8) Technical University of Denmark, (9) Yale University, Abe Falcone (15), Adam R. Ingram (4), Andrew C. Fabian (14), Anna Zajczyk (1), Arash Bodaghee (6), Astronomical Institute), Astronomy, Astronomy Dept., Astrophysics, Banafsheh Beheshtipour (1), Berkeley, Brian W. Grefenstette (3), Cahill Center for Astronomy, Center for Experimental Studies, Centre for Extragalactic Astronomy, Centre for Space Research, Chester Borden (2), Chris Done (12), Chung H. Lee (2), Daniel Stern (2), Department of Astronomy, Department of Astronomy & Theoretical Astrophysics Center, Department of Chemistry, Department of Physics, Dimitrios Psaltis (27), Don Ellison (13), DTU Space, Erin Kara (14), Fabian F. Kislat (1), Feryal Oezel (27), Finn E. Christensen (8), Fiona A. Harrison (3), Henric S. Krawczynski (1), Hiromasa Miyasaka (3), Hironori Matsumoto (21), INAF, Institute of Astronomy, Italy, Janie Hoormann (1), Jason Dexter (11), Jeffrey A. Favretto (2), Jeffrey Booth (2), Jonathan McKinney (22), Jon M. Miller (24), Kenji Toma (30), Kim M. Aaron (2), Kobayashi-Maskawa Institute for the Origin of Particles, Kristin K. Madsen (3), Lorenzo Natalucci (26), Luis A. Dominguez (2), Markus Boettcher (7), Matthew G. Baring (5), Matthias Beilicke (1), Maxim Lyutikov (19), McDonnell Center for the Space Sciences (2) Jet Propulsion Laboratory, Michael J. Pivovaroff (28), National Space Institute, Paolo Giommi (18), Paolo S. Coppi (9), Physics, Physics Department, Qingzhen Guo (1), Ramanath Cowsik (1), Ramesh Narayan (25), Rashied Aminia (2), Robin J. English (2), Rodrigo Fernandez (16, Ryan Endsley (1), Shane Davis (10), Steven Pravdo (2), Takashi Okajima (29), Tatehiro Mihara (23), the Universe, Thomas Maccarone (20), UK, William W. Zhang (29) ((1) Washington University in Saint Louis","submitted_at":"2015-10-28T15:54:48Z","abstract_excerpt":"This paper describes the Polarization Spectroscopic Telescope Array (PolSTAR), a mission proposed to NASA's 2014 Small Explorer (SMEX) announcement of opportunity. PolSTAR measures the linear polarization of 3-50 keV (requirement; goal: 2.5-70 keV) X-rays probing the behavior of matter, radiation and the very fabric of spacetime under the extreme conditions close to the event horizons of black holes, as well as in and around magnetars and neutron stars. The PolSTAR design is based on the technology developed for the Nuclear Spectroscopic Telescope Array (NuSTAR) mission launched in June 2012. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08358","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bh39rzqVExlrlakK/iakAHNaXwRwnBafOC0WtAvS1HO6aWI066SN4kNFAKRqW7lgPH4drLIzbUsWPU5DkITvAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T21:38:48.112233Z"},"content_sha256":"8e8b60d7c430cf9bb8f391fa785b8479fea3561a2e4a55d26055068087301661","schema_version":"1.0","event_id":"sha256:8e8b60d7c430cf9bb8f391fa785b8479fea3561a2e4a55d26055068087301661"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX/bundle.json","state_url":"https://pith.science/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-06T21:38:48Z","links":{"resolver":"https://pith.science/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX","bundle":"https://pith.science/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX/bundle.json","state":"https://pith.science/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KNQXC2P5XV6M57NCA3S5DUJ7TX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KNQXC2P5XV6M57NCA3S5DUJ7TX","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"841037afd628d279ecd293611a7ff4879552d0446a597e4076ad8a9f5503b37a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-10-28T15:54:48Z","title_canon_sha256":"8bc26300973eef89c9548152f7dbaaed820e2bc57564b629e928663ab88cbd9e"},"schema_version":"1.0","source":{"id":"1510.08358","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08358","created_at":"2026-05-18T01:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08358v1","created_at":"2026-05-18T01:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08358","created_at":"2026-05-18T01:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"KNQXC2P5XV6M","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KNQXC2P5XV6M57NC","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KNQXC2P5","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:8e8b60d7c430cf9bb8f391fa785b8479fea3561a2e4a55d26055068087301661","target":"graph","created_at":"2026-05-18T01:23:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"This paper describes the Polarization Spectroscopic Telescope Array (PolSTAR), a mission proposed to NASA's 2014 Small Explorer (SMEX) announcement of opportunity. PolSTAR measures the linear polarization of 3-50 keV (requirement; goal: 2.5-70 keV) X-rays probing the behavior of matter, radiation and the very fabric of spacetime under the extreme conditions close to the event horizons of black holes, as well as in and around magnetars and neutron stars. The PolSTAR design is based on the technology developed for the Nuclear Spectroscopic Telescope Array (NuSTAR) mission launched in June 2012. ","authors_text":"(10) University of Virginia, (11) MPI for Extraterrestrial Physics Garching, (12) Durham University, (13) North Carolina State University, (14) Cambridge, (15) Penn State University, (16) University of California, 17), (17) University of California, (18) ASI Science Data Center, (19) Purdue University, (20) Texas Tech University, (21) Nagoya University, (22) University of Maryland, (23) RIKEN, (24) Univ. of Michigan in Ann Arbor, (25) Harvard-Smithsonian Center for Astrophysics, (26) Istituto di Astrofisica e Planetologia Spaziali, (27) Department of Astronomy/Steward Observatory, (28) Lawrence Livermore National Laboratory, (29) NASA Goddard Space Flight Center, (30) Tohoku University, (3) California Institute of Technology, (4) Anton Pannekoek Institute for Astronomy, (5) Rice University, (6) Georgia College, (7) North-West University, (8) Technical University of Denmark, (9) Yale University, Abe Falcone (15), Adam R. Ingram (4), Andrew C. Fabian (14), Anna Zajczyk (1), Arash Bodaghee (6), Astronomical Institute), Astronomy, Astronomy Dept., Astrophysics, Banafsheh Beheshtipour (1), Berkeley, Brian W. Grefenstette (3), Cahill Center for Astronomy, Center for Experimental Studies, Centre for Extragalactic Astronomy, Centre for Space Research, Chester Borden (2), Chris Done (12), Chung H. Lee (2), Daniel Stern (2), Department of Astronomy, Department of Astronomy & Theoretical Astrophysics Center, Department of Chemistry, Department of Physics, Dimitrios Psaltis (27), Don Ellison (13), DTU Space, Erin Kara (14), Fabian F. Kislat (1), Feryal Oezel (27), Finn E. Christensen (8), Fiona A. Harrison (3), Henric S. Krawczynski (1), Hiromasa Miyasaka (3), Hironori Matsumoto (21), INAF, Institute of Astronomy, Italy, Janie Hoormann (1), Jason Dexter (11), Jeffrey A. Favretto (2), Jeffrey Booth (2), Jonathan McKinney (22), Jon M. Miller (24), Kenji Toma (30), Kim M. Aaron (2), Kobayashi-Maskawa Institute for the Origin of Particles, Kristin K. Madsen (3), Lorenzo Natalucci (26), Luis A. Dominguez (2), Markus Boettcher (7), Matthew G. Baring (5), Matthias Beilicke (1), Maxim Lyutikov (19), McDonnell Center for the Space Sciences (2) Jet Propulsion Laboratory, Michael J. Pivovaroff (28), National Space Institute, Paolo Giommi (18), Paolo S. Coppi (9), Physics, Physics Department, Qingzhen Guo (1), Ramanath Cowsik (1), Ramesh Narayan (25), Rashied Aminia (2), Robin J. English (2), Rodrigo Fernandez (16, Ryan Endsley (1), Shane Davis (10), Steven Pravdo (2), Takashi Okajima (29), Tatehiro Mihara (23), the Universe, Thomas Maccarone (20), UK, William W. Zhang (29) ((1) Washington University in Saint Louis","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-10-28T15:54:48Z","title":"X-Ray Polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08358","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:4d6e8978d280a56a9ad74164659ba60a0af3cc1bba369322f338f58645d61fd1","target":"record","created_at":"2026-05-18T01:23:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"841037afd628d279ecd293611a7ff4879552d0446a597e4076ad8a9f5503b37a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-10-28T15:54:48Z","title_canon_sha256":"8bc26300973eef89c9548152f7dbaaed820e2bc57564b629e928663ab88cbd9e"},"schema_version":"1.0","source":{"id":"1510.08358","kind":"arxiv","version":1}},"canonical_sha256":"53617169fdbd7ccefda206e5d1d13f9de9204f4c7c8ec0e94116eafe75080add","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"53617169fdbd7ccefda206e5d1d13f9de9204f4c7c8ec0e94116eafe75080add","first_computed_at":"2026-05-18T01:23:22.796119Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:22.796119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NUQRP4qMF7gFG8z/kotDAUklRzr/zdx49efSYZYfYo87EZw7f3x1ocOFVGXzuPKYZKe8tq5y2baAwUfiu6mLDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:22.796781Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.08358","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d6e8978d280a56a9ad74164659ba60a0af3cc1bba369322f338f58645d61fd1","sha256:8e8b60d7c430cf9bb8f391fa785b8479fea3561a2e4a55d26055068087301661"],"state_sha256":"ee22987e38b98225b612211305c1e01157a89e04a44fd1913f2ad419cd9166b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qxEDnp3OJBl4awUz8HjiNnBewu6uRa0OsHXgPu0ZSlxAi3zMdnNtDYHNBbMIp2QxeG0pFB5BW3b1knZ6LJ4QDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T21:38:48.115658Z","bundle_sha256":"284a5a218b892dc20fa7a3f58f4035be73816d030cce2fa07b61a609ce558938"}}