{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:CM7HKGKDWUR4UQJ547H52JTQRS","short_pith_number":"pith:CM7HKGKD","canonical_record":{"source":{"id":"1608.07184","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-25T14:55:44Z","cross_cats_sorted":[],"title_canon_sha256":"8032a205ae38de97ec5b44c2f1fb83bf96c84554827a184d06086db5948f6285","abstract_canon_sha256":"8c5ebd51f9357bdc2424bbef4a469ad420edd837e979afda3aab3934e04a8ebd"},"schema_version":"1.0"},"canonical_sha256":"133e751943b523ca413de7cfdd26708cbed05c8ae2b254901e106df2d2fdcaea","source":{"kind":"arxiv","id":"1608.07184","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.07184","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"arxiv_version","alias_value":"1608.07184v1","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.07184","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"pith_short_12","alias_value":"CM7HKGKDWUR4","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CM7HKGKDWUR4UQJ5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CM7HKGKD","created_at":"2026-05-18T12:30:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:CM7HKGKDWUR4UQJ547H52JTQRS","target":"record","payload":{"canonical_record":{"source":{"id":"1608.07184","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-25T14:55:44Z","cross_cats_sorted":[],"title_canon_sha256":"8032a205ae38de97ec5b44c2f1fb83bf96c84554827a184d06086db5948f6285","abstract_canon_sha256":"8c5ebd51f9357bdc2424bbef4a469ad420edd837e979afda3aab3934e04a8ebd"},"schema_version":"1.0"},"canonical_sha256":"133e751943b523ca413de7cfdd26708cbed05c8ae2b254901e106df2d2fdcaea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:57.394603Z","signature_b64":"rivocUxeZdXSZWMp7yNJEdE9mLtKfqPL5jd6D7v3HAshRYMWZoxxr+dRadezMAySKw2ZW6kO7QWONVRjEwmEDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"133e751943b523ca413de7cfdd26708cbed05c8ae2b254901e106df2d2fdcaea","last_reissued_at":"2026-05-18T00:59:57.394006Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:57.394006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.07184","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":"2026-05-18T00:59:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MDWMZgpMnBFQ8arHL3U3nwWo4ovWmuVafp4y9y8PSw+6mXKVrISD56njAqjr1uUzmBeveiPefjc1R85T+Lc+Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T03:49:36.419507Z"},"content_sha256":"1c48cd4b6bdf14d0447c51a7dc8c51c005b38c8d53a4c09e27fa61751cc1bb95","schema_version":"1.0","event_id":"sha256:1c48cd4b6bdf14d0447c51a7dc8c51c005b38c8d53a4c09e27fa61751cc1bb95"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:CM7HKGKDWUR4UQJ547H52JTQRS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for gamma-ray line features from Milky Way satellites with Fermi-LAT Pass 8 data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"En-Wei Liang, Jin Chang, Lei Feng, Qiang Yuan, Wei Jiang, Xiang Li, Yi-Zhong Fan, Yun-Feng Liang, Zhao-Qiang Shen, Zi-Qing Xia","submitted_at":"2016-08-25T14:55:44Z","abstract_excerpt":"With 91 months of the publicly available Fermi-LAT Pass 8 data, we analyze the gamma-ray emission from the Milky Way satellites to search for potential line signals due to the annihilation of dark matter particles into double photons. The searched targets include a sample of dwarf spheroidal galaxies, the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). No significant line emission has been found neither in the stacked dwarf galaxy sample nor in the direction of LMC/SMC. The corresponding upper limits on the cross section of DM annihilation into two photons are derived. Compared "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.07184","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":"2026-05-18T00:59:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jr/Eyj3Hi7zIiMz5LuG4X5tBTbTN+wHLQ9H8V9RD64vZaQtNMWtm65NRKHH8DewtXQE4wIYOG2YMD3LQD9ejAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T03:49:36.419891Z"},"content_sha256":"2b1bc33fc7aa918b7dc8c4e1e06eb5f1bb5b15509af38aa05fae617f79828936","schema_version":"1.0","event_id":"sha256:2b1bc33fc7aa918b7dc8c4e1e06eb5f1bb5b15509af38aa05fae617f79828936"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CM7HKGKDWUR4UQJ547H52JTQRS/bundle.json","state_url":"https://pith.science/pith/CM7HKGKDWUR4UQJ547H52JTQRS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CM7HKGKDWUR4UQJ547H52JTQRS/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":"2026-06-03T03:49:36Z","links":{"resolver":"https://pith.science/pith/CM7HKGKDWUR4UQJ547H52JTQRS","bundle":"https://pith.science/pith/CM7HKGKDWUR4UQJ547H52JTQRS/bundle.json","state":"https://pith.science/pith/CM7HKGKDWUR4UQJ547H52JTQRS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CM7HKGKDWUR4UQJ547H52JTQRS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:CM7HKGKDWUR4UQJ547H52JTQRS","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":"8c5ebd51f9357bdc2424bbef4a469ad420edd837e979afda3aab3934e04a8ebd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-25T14:55:44Z","title_canon_sha256":"8032a205ae38de97ec5b44c2f1fb83bf96c84554827a184d06086db5948f6285"},"schema_version":"1.0","source":{"id":"1608.07184","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.07184","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"arxiv_version","alias_value":"1608.07184v1","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.07184","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"pith_short_12","alias_value":"CM7HKGKDWUR4","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CM7HKGKDWUR4UQJ5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CM7HKGKD","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:2b1bc33fc7aa918b7dc8c4e1e06eb5f1bb5b15509af38aa05fae617f79828936","target":"graph","created_at":"2026-05-18T00:59:57Z","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":"With 91 months of the publicly available Fermi-LAT Pass 8 data, we analyze the gamma-ray emission from the Milky Way satellites to search for potential line signals due to the annihilation of dark matter particles into double photons. The searched targets include a sample of dwarf spheroidal galaxies, the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). No significant line emission has been found neither in the stacked dwarf galaxy sample nor in the direction of LMC/SMC. The corresponding upper limits on the cross section of DM annihilation into two photons are derived. Compared ","authors_text":"En-Wei Liang, Jin Chang, Lei Feng, Qiang Yuan, Wei Jiang, Xiang Li, Yi-Zhong Fan, Yun-Feng Liang, Zhao-Qiang Shen, Zi-Qing Xia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-25T14:55:44Z","title":"Search for gamma-ray line features from Milky Way satellites with Fermi-LAT Pass 8 data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.07184","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":"sha256:1c48cd4b6bdf14d0447c51a7dc8c51c005b38c8d53a4c09e27fa61751cc1bb95","target":"record","created_at":"2026-05-18T00:59:57Z","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":"8c5ebd51f9357bdc2424bbef4a469ad420edd837e979afda3aab3934e04a8ebd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-25T14:55:44Z","title_canon_sha256":"8032a205ae38de97ec5b44c2f1fb83bf96c84554827a184d06086db5948f6285"},"schema_version":"1.0","source":{"id":"1608.07184","kind":"arxiv","version":1}},"canonical_sha256":"133e751943b523ca413de7cfdd26708cbed05c8ae2b254901e106df2d2fdcaea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"133e751943b523ca413de7cfdd26708cbed05c8ae2b254901e106df2d2fdcaea","first_computed_at":"2026-05-18T00:59:57.394006Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:57.394006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rivocUxeZdXSZWMp7yNJEdE9mLtKfqPL5jd6D7v3HAshRYMWZoxxr+dRadezMAySKw2ZW6kO7QWONVRjEwmEDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:57.394603Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.07184","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c48cd4b6bdf14d0447c51a7dc8c51c005b38c8d53a4c09e27fa61751cc1bb95","sha256:2b1bc33fc7aa918b7dc8c4e1e06eb5f1bb5b15509af38aa05fae617f79828936"],"state_sha256":"e6dc5eebd5423b6f8b7c69abd8c12db8d9143c7deb940b4a6dce78e2460cd333"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TDz9pO69O6hieKG4Egg5GvJfGalLPD0fSjNPjE18TpS7s9C+KFuAX67N5vPBMzLY2bV1qM6igk3OpSSv7AzfBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T03:49:36.422344Z","bundle_sha256":"32af78ea9bf80fd8a7b165cfd768ea4df8f003557e9f29f367ff731e093486c2"}}