{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:645T5LL2BQZLXTEKYWIU7LGYVD","short_pith_number":"pith:645T5LL2","canonical_record":{"source":{"id":"1501.05308","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-21T21:00:12Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"e88a006242a87e30a9f68cd1a2cf92291d64a421edc35a3881d6bb9e738d4118","abstract_canon_sha256":"18c72607a0eb3febe4911020fdc0e953ceb3df233748d35120852b5a9613c0f8"},"schema_version":"1.0"},"canonical_sha256":"f73b3ead7a0c32bbcc8ac5914facd8a8c3367aa893f13f8811672f843d5ec5aa","source":{"kind":"arxiv","id":"1501.05308","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.05308","created_at":"2026-05-18T02:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"1501.05308v2","created_at":"2026-05-18T02:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.05308","created_at":"2026-05-18T02:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"645T5LL2BQZL","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"645T5LL2BQZLXTEK","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"645T5LL2","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:645T5LL2BQZLXTEKYWIU7LGYVD","target":"record","payload":{"canonical_record":{"source":{"id":"1501.05308","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-21T21:00:12Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"e88a006242a87e30a9f68cd1a2cf92291d64a421edc35a3881d6bb9e738d4118","abstract_canon_sha256":"18c72607a0eb3febe4911020fdc0e953ceb3df233748d35120852b5a9613c0f8"},"schema_version":"1.0"},"canonical_sha256":"f73b3ead7a0c32bbcc8ac5914facd8a8c3367aa893f13f8811672f843d5ec5aa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:01.998917Z","signature_b64":"gAJyq952TauAD+lapeCVCqmuRzdVgi8sG/itX3UWKRLNgkMA9vedpJJGAxbM9qohCaeaHc7FCPoM9W66ZGjQCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f73b3ead7a0c32bbcc8ac5914facd8a8c3367aa893f13f8811672f843d5ec5aa","last_reissued_at":"2026-05-18T02:04:01.998375Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:01.998375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.05308","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3q/l/F6zEooxG0UhjQcL+xs11RorGhavi/CtLcNE7FHQrQh20sPjpdAtK+050qUMzwkTQpcWHvyO/VUDwfq4CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T06:33:50.142878Z"},"content_sha256":"77273eb99315c60a3df94368bdba9dc155c1305bc265fdd83bacb9dc27355875","schema_version":"1.0","event_id":"sha256:77273eb99315c60a3df94368bdba9dc155c1305bc265fdd83bacb9dc27355875"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:645T5LL2BQZLXTEKYWIU7LGYVD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gamma-ray novae as probes of relativistic particle acceleration at non-relativistic shocks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Andrei M. Beloborodov, Brian D. Metzger, Indrek Vurm, Laura Chomiuk, Romain Hascoet, Thomas Finzell","submitted_at":"2015-01-21T21:00:12Z","abstract_excerpt":"The Fermi LAT discovery that classical novae produce >100 MeV gamma-rays establishes that shocks and relativistic particle acceleration are key features of these events. These shocks are likely to be radiative due to the high densities of the nova ejecta at early times coincident with the gamma-ray emission. Thermal X-rays radiated behind the shock are absorbed by neutral gas and reprocessed into optical emission, similar to Type IIn (interacting) supernovae. Gamma-rays are produced by collisions between relativistic protons with the nova ejecta (hadronic scenario) or Inverse Compton/bremsstra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.05308","kind":"arxiv","version":2},"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":"2026-05-18T02:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eI2Bc6UJU0UyRW9zK3vHXvM1AEXg6Q2kGu4Y98g58IG48yobjNg/9V2yJ2BlMy7YIjkCjnCWkiQ4pHXUR0/sDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T06:33:50.143589Z"},"content_sha256":"37e6fcfe0d38449180ccbdd9a546f98931dc5b09cb5c2dc70764dce181477713","schema_version":"1.0","event_id":"sha256:37e6fcfe0d38449180ccbdd9a546f98931dc5b09cb5c2dc70764dce181477713"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/645T5LL2BQZLXTEKYWIU7LGYVD/bundle.json","state_url":"https://pith.science/pith/645T5LL2BQZLXTEKYWIU7LGYVD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/645T5LL2BQZLXTEKYWIU7LGYVD/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":"2026-05-23T06:33:50Z","links":{"resolver":"https://pith.science/pith/645T5LL2BQZLXTEKYWIU7LGYVD","bundle":"https://pith.science/pith/645T5LL2BQZLXTEKYWIU7LGYVD/bundle.json","state":"https://pith.science/pith/645T5LL2BQZLXTEKYWIU7LGYVD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/645T5LL2BQZLXTEKYWIU7LGYVD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:645T5LL2BQZLXTEKYWIU7LGYVD","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":"18c72607a0eb3febe4911020fdc0e953ceb3df233748d35120852b5a9613c0f8","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-21T21:00:12Z","title_canon_sha256":"e88a006242a87e30a9f68cd1a2cf92291d64a421edc35a3881d6bb9e738d4118"},"schema_version":"1.0","source":{"id":"1501.05308","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.05308","created_at":"2026-05-18T02:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"1501.05308v2","created_at":"2026-05-18T02:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.05308","created_at":"2026-05-18T02:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"645T5LL2BQZL","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"645T5LL2BQZLXTEK","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"645T5LL2","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:37e6fcfe0d38449180ccbdd9a546f98931dc5b09cb5c2dc70764dce181477713","target":"graph","created_at":"2026-05-18T02:04:01Z","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":"The Fermi LAT discovery that classical novae produce >100 MeV gamma-rays establishes that shocks and relativistic particle acceleration are key features of these events. These shocks are likely to be radiative due to the high densities of the nova ejecta at early times coincident with the gamma-ray emission. Thermal X-rays radiated behind the shock are absorbed by neutral gas and reprocessed into optical emission, similar to Type IIn (interacting) supernovae. Gamma-rays are produced by collisions between relativistic protons with the nova ejecta (hadronic scenario) or Inverse Compton/bremsstra","authors_text":"Andrei M. Beloborodov, Brian D. Metzger, Indrek Vurm, Laura Chomiuk, Romain Hascoet, Thomas Finzell","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-21T21:00:12Z","title":"Gamma-ray novae as probes of relativistic particle acceleration at non-relativistic shocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.05308","kind":"arxiv","version":2},"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":"sha256:77273eb99315c60a3df94368bdba9dc155c1305bc265fdd83bacb9dc27355875","target":"record","created_at":"2026-05-18T02:04:01Z","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":"18c72607a0eb3febe4911020fdc0e953ceb3df233748d35120852b5a9613c0f8","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-21T21:00:12Z","title_canon_sha256":"e88a006242a87e30a9f68cd1a2cf92291d64a421edc35a3881d6bb9e738d4118"},"schema_version":"1.0","source":{"id":"1501.05308","kind":"arxiv","version":2}},"canonical_sha256":"f73b3ead7a0c32bbcc8ac5914facd8a8c3367aa893f13f8811672f843d5ec5aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f73b3ead7a0c32bbcc8ac5914facd8a8c3367aa893f13f8811672f843d5ec5aa","first_computed_at":"2026-05-18T02:04:01.998375Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:01.998375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gAJyq952TauAD+lapeCVCqmuRzdVgi8sG/itX3UWKRLNgkMA9vedpJJGAxbM9qohCaeaHc7FCPoM9W66ZGjQCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:01.998917Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.05308","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77273eb99315c60a3df94368bdba9dc155c1305bc265fdd83bacb9dc27355875","sha256:37e6fcfe0d38449180ccbdd9a546f98931dc5b09cb5c2dc70764dce181477713"],"state_sha256":"837768566dccba8d82bd66de013bdd7719a2bcc6fc0159ef4d779d0773a46b70"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JPbmy9iLQhNAFrW2Nce/H3zr+rg0WRelg9v0Mkft21Pit6qz9QE6bZV3JOUmz/r+NkYqSAfvQXsB6tBCmsjEAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T06:33:50.146741Z","bundle_sha256":"e027f828100b894519eea4f1ce8dbecb2f5412018393bd8bfed9bc92d68e4b08"}}