{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:QABL7NGQ6RBH372CJH4CODC6VT","short_pith_number":"pith:QABL7NGQ","canonical_record":{"source":{"id":"2112.08757","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-16T10:13:00Z","cross_cats_sorted":[],"title_canon_sha256":"67f1d2365d4da4bd106a7cf38d9f8b3f2dac00cdfb123d75ccbb9fadd27ba6b2","abstract_canon_sha256":"530b8db69fd09027bb3a6f84c33d2541ac07dc52a4ad48c2558b2f43e2d27757"},"schema_version":"1.0"},"canonical_sha256":"8002bfb4d0f4427dff4249f8270c5eaccdb34706c5d7e9c228139ab8be1b37c3","source":{"kind":"arxiv","id":"2112.08757","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.08757","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"arxiv_version","alias_value":"2112.08757v1","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.08757","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"pith_short_12","alias_value":"QABL7NGQ6RBH","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"pith_short_16","alias_value":"QABL7NGQ6RBH372C","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"pith_short_8","alias_value":"QABL7NGQ","created_at":"2026-07-05T03:58:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:QABL7NGQ6RBH372CJH4CODC6VT","target":"record","payload":{"canonical_record":{"source":{"id":"2112.08757","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-16T10:13:00Z","cross_cats_sorted":[],"title_canon_sha256":"67f1d2365d4da4bd106a7cf38d9f8b3f2dac00cdfb123d75ccbb9fadd27ba6b2","abstract_canon_sha256":"530b8db69fd09027bb3a6f84c33d2541ac07dc52a4ad48c2558b2f43e2d27757"},"schema_version":"1.0"},"canonical_sha256":"8002bfb4d0f4427dff4249f8270c5eaccdb34706c5d7e9c228139ab8be1b37c3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:58:05.564812Z","signature_b64":"SPT8078r6Z5puAXAEizXafBc4M8mqWYrD4qjseHl/DieO6b/t4EyYfzpqlyXvScALa8/cfdgaXh6SXx9a6jDAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8002bfb4d0f4427dff4249f8270c5eaccdb34706c5d7e9c228139ab8be1b37c3","last_reissued_at":"2026-07-05T03:58:05.564418Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:58:05.564418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.08757","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":"2026-07-05T03:58:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QiNhnEg6NVgnKNGC5JtfeyybsYk7CuS1eoPhGIRLyajOjc5EjTDwB/5gwfZVGDMAGeWiN1AGNNEUlTsYveBcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T09:23:48.979552Z"},"content_sha256":"9697876c97a7d5d6c3acf4d3641dd21ab33bf8197754d356c422e808d0b6fcf8","schema_version":"1.0","event_id":"sha256:9697876c97a7d5d6c3acf4d3641dd21ab33bf8197754d356c422e808d0b6fcf8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:QABL7NGQ6RBH372CJH4CODC6VT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-high Energy Gamma-rays from Past Explosions in our Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alokananda Kar, Nayantara Gupta","submitted_at":"2021-12-16T10:13:00Z","abstract_excerpt":"The discovery of the sources of ultra-high energy photons by High-Altitude Water Cerenkov Gamma ray Observatory and Large High Altitude Air Shower Observatory in our Galaxy has revolutionised the field of gamma ray astronomy in the last few years. These emissions are sometimes found in the vicinity of powerful pulsars or supernova remnants associated with giant molecular clouds. Inverse Compton emission by shock accelerated electrons emitted by pulsars and proton-proton interactions of shock accelerated protons emitted by supernova remnants with cold protons in molecular clouds are often ident"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.08757","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2112.08757/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:58:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eITlAoJKM9xdQIcZGGTR+poEx1JCvY5U7mMFoh75fGrK73lU/wL+RNib1cKiROsKs3QaVukGtfE1z0agJ9CtCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T09:23:48.980083Z"},"content_sha256":"d986d8f6b59c4d157f0d3503987af7bccc8d6d9d492d11444010eb63394ce5eb","schema_version":"1.0","event_id":"sha256:d986d8f6b59c4d157f0d3503987af7bccc8d6d9d492d11444010eb63394ce5eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QABL7NGQ6RBH372CJH4CODC6VT/bundle.json","state_url":"https://pith.science/pith/QABL7NGQ6RBH372CJH4CODC6VT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QABL7NGQ6RBH372CJH4CODC6VT/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":"2026-08-11T09:23:48Z","links":{"resolver":"https://pith.science/pith/QABL7NGQ6RBH372CJH4CODC6VT","bundle":"https://pith.science/pith/QABL7NGQ6RBH372CJH4CODC6VT/bundle.json","state":"https://pith.science/pith/QABL7NGQ6RBH372CJH4CODC6VT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QABL7NGQ6RBH372CJH4CODC6VT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:QABL7NGQ6RBH372CJH4CODC6VT","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":"530b8db69fd09027bb3a6f84c33d2541ac07dc52a4ad48c2558b2f43e2d27757","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-16T10:13:00Z","title_canon_sha256":"67f1d2365d4da4bd106a7cf38d9f8b3f2dac00cdfb123d75ccbb9fadd27ba6b2"},"schema_version":"1.0","source":{"id":"2112.08757","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.08757","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"arxiv_version","alias_value":"2112.08757v1","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.08757","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"pith_short_12","alias_value":"QABL7NGQ6RBH","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"pith_short_16","alias_value":"QABL7NGQ6RBH372C","created_at":"2026-07-05T03:58:05Z"},{"alias_kind":"pith_short_8","alias_value":"QABL7NGQ","created_at":"2026-07-05T03:58:05Z"}],"graph_snapshots":[{"event_id":"sha256:d986d8f6b59c4d157f0d3503987af7bccc8d6d9d492d11444010eb63394ce5eb","target":"graph","created_at":"2026-07-05T03:58:05Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2112.08757/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The discovery of the sources of ultra-high energy photons by High-Altitude Water Cerenkov Gamma ray Observatory and Large High Altitude Air Shower Observatory in our Galaxy has revolutionised the field of gamma ray astronomy in the last few years. These emissions are sometimes found in the vicinity of powerful pulsars or supernova remnants associated with giant molecular clouds. Inverse Compton emission by shock accelerated electrons emitted by pulsars and proton-proton interactions of shock accelerated protons emitted by supernova remnants with cold protons in molecular clouds are often ident","authors_text":"Alokananda Kar, Nayantara Gupta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-16T10:13:00Z","title":"Ultra-high Energy Gamma-rays from Past Explosions in our Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.08757","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":"sha256:9697876c97a7d5d6c3acf4d3641dd21ab33bf8197754d356c422e808d0b6fcf8","target":"record","created_at":"2026-07-05T03:58:05Z","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":"530b8db69fd09027bb3a6f84c33d2541ac07dc52a4ad48c2558b2f43e2d27757","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-16T10:13:00Z","title_canon_sha256":"67f1d2365d4da4bd106a7cf38d9f8b3f2dac00cdfb123d75ccbb9fadd27ba6b2"},"schema_version":"1.0","source":{"id":"2112.08757","kind":"arxiv","version":1}},"canonical_sha256":"8002bfb4d0f4427dff4249f8270c5eaccdb34706c5d7e9c228139ab8be1b37c3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8002bfb4d0f4427dff4249f8270c5eaccdb34706c5d7e9c228139ab8be1b37c3","first_computed_at":"2026-07-05T03:58:05.564418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:58:05.564418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SPT8078r6Z5puAXAEizXafBc4M8mqWYrD4qjseHl/DieO6b/t4EyYfzpqlyXvScALa8/cfdgaXh6SXx9a6jDAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:58:05.564812Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.08757","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9697876c97a7d5d6c3acf4d3641dd21ab33bf8197754d356c422e808d0b6fcf8","sha256:d986d8f6b59c4d157f0d3503987af7bccc8d6d9d492d11444010eb63394ce5eb"],"state_sha256":"c0e5893b32ac9a4f138cd73e2de444b95f36710e8ff95095c7d6fa5261bcf2e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ew6SzHuuwXfPzGrGvfbogzEwrVPkaqKSh8CwSIqd7WQGBYxIK+cyT+b6Qckp4PMYq+44MVtrVBltPyHOtmC2Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T09:23:48.985415Z","bundle_sha256":"5a07d6891bab7748aadff451b9a58b653c55a348e88d027ff80f331b931e4181"}}