{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:Y3DIFVSB3V243BQK4SMMOZRBQB","short_pith_number":"pith:Y3DIFVSB","canonical_record":{"source":{"id":"1412.1831","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-04T21:00:09Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"74fe921560f1a0e21429562a4da896ad6806728e9f006714843429f6c3ac5a7f","abstract_canon_sha256":"5df9175aaa8ddef61776ec7b32ae053e57fec84f6c3a26a697e725ad0b970892"},"schema_version":"1.0"},"canonical_sha256":"c6c682d641dd75cd860ae498c7662180526c66e5c67412f775bf5ba442e8d418","source":{"kind":"arxiv","id":"1412.1831","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.1831","created_at":"2026-05-18T01:41:23Z"},{"alias_kind":"arxiv_version","alias_value":"1412.1831v1","created_at":"2026-05-18T01:41:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.1831","created_at":"2026-05-18T01:41:23Z"},{"alias_kind":"pith_short_12","alias_value":"Y3DIFVSB3V24","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y3DIFVSB3V243BQK","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y3DIFVSB","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:Y3DIFVSB3V243BQK4SMMOZRBQB","target":"record","payload":{"canonical_record":{"source":{"id":"1412.1831","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-04T21:00:09Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"74fe921560f1a0e21429562a4da896ad6806728e9f006714843429f6c3ac5a7f","abstract_canon_sha256":"5df9175aaa8ddef61776ec7b32ae053e57fec84f6c3a26a697e725ad0b970892"},"schema_version":"1.0"},"canonical_sha256":"c6c682d641dd75cd860ae498c7662180526c66e5c67412f775bf5ba442e8d418","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:23.120290Z","signature_b64":"OqfesLDdbSu5dnycw+k0yn8MGBdzFXcdmFDdRQG3xum4A2C3/lPplbpc10KEDDwmfKQ87DMiUbK5Zysp550OBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6c682d641dd75cd860ae498c7662180526c66e5c67412f775bf5ba442e8d418","last_reissued_at":"2026-05-18T01:41:23.119665Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:23.119665Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.1831","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":"2026-05-18T01:41:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WVuPTnWZPzHvKRfRk8ZJaefYoGW5MSGCQFPJ03sciBEQ6JG9s3+145802+OQGjLCO7y0c3FKKy+V4iTWsem7CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:10:46.050085Z"},"content_sha256":"9ca2bffbcf76697be861071948d53aca5187bbac50984028656704484ddc25bb","schema_version":"1.0","event_id":"sha256:9ca2bffbcf76697be861071948d53aca5187bbac50984028656704484ddc25bb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:Y3DIFVSB3V243BQK4SMMOZRBQB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The BL-Lac gamma-ray blazar PKS 0447-439 as a probable member of a group of galaxies at z=0.343","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A.C. Rovero, A. Pichel, C. Donzelli, H. Muriel","submitted_at":"2014-12-04T21:00:09Z","abstract_excerpt":"The BL-Lac blazar PKS 0447-439 is one of the brightest HE gamma-ray sources that were first detected by Fermi-LAT. It was also detected by H.E.S.S. at VHE gamma-rays, which allowed constraining the redshift of PKS 0447-439 by considering the attenuation caused by gamma-ray interactions with ambient photons in the extragalactic background light (EBL). This constraint agreed with color-magnitude and spectroscopic redshift constraints (0.179 < z < 0.56), Recently, however, a much higher redshift was proposed for this blazar (z > 1.2). This value was debated because if true, it would imply either "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.1831","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":"2026-05-18T01:41:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fjKwbBZsIY6F0Thkq+hq4sfGXul7vzN3b0wD30AyCwbtmlxX0LdOgPtAyNBJnLyqjv2gSMBQ8GPGPQDUNEJpCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:10:46.050798Z"},"content_sha256":"16a80c60b7bd32622933a7fda2f56114d5ffbcd833c3a54ea4408a47476d8aa3","schema_version":"1.0","event_id":"sha256:16a80c60b7bd32622933a7fda2f56114d5ffbcd833c3a54ea4408a47476d8aa3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y3DIFVSB3V243BQK4SMMOZRBQB/bundle.json","state_url":"https://pith.science/pith/Y3DIFVSB3V243BQK4SMMOZRBQB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y3DIFVSB3V243BQK4SMMOZRBQB/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":"2026-06-09T18:10:46Z","links":{"resolver":"https://pith.science/pith/Y3DIFVSB3V243BQK4SMMOZRBQB","bundle":"https://pith.science/pith/Y3DIFVSB3V243BQK4SMMOZRBQB/bundle.json","state":"https://pith.science/pith/Y3DIFVSB3V243BQK4SMMOZRBQB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y3DIFVSB3V243BQK4SMMOZRBQB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:Y3DIFVSB3V243BQK4SMMOZRBQB","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":"5df9175aaa8ddef61776ec7b32ae053e57fec84f6c3a26a697e725ad0b970892","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-04T21:00:09Z","title_canon_sha256":"74fe921560f1a0e21429562a4da896ad6806728e9f006714843429f6c3ac5a7f"},"schema_version":"1.0","source":{"id":"1412.1831","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.1831","created_at":"2026-05-18T01:41:23Z"},{"alias_kind":"arxiv_version","alias_value":"1412.1831v1","created_at":"2026-05-18T01:41:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.1831","created_at":"2026-05-18T01:41:23Z"},{"alias_kind":"pith_short_12","alias_value":"Y3DIFVSB3V24","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y3DIFVSB3V243BQK","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y3DIFVSB","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:16a80c60b7bd32622933a7fda2f56114d5ffbcd833c3a54ea4408a47476d8aa3","target":"graph","created_at":"2026-05-18T01:41:23Z","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 BL-Lac blazar PKS 0447-439 is one of the brightest HE gamma-ray sources that were first detected by Fermi-LAT. It was also detected by H.E.S.S. at VHE gamma-rays, which allowed constraining the redshift of PKS 0447-439 by considering the attenuation caused by gamma-ray interactions with ambient photons in the extragalactic background light (EBL). This constraint agreed with color-magnitude and spectroscopic redshift constraints (0.179 < z < 0.56), Recently, however, a much higher redshift was proposed for this blazar (z > 1.2). This value was debated because if true, it would imply either ","authors_text":"A.C. Rovero, A. Pichel, C. Donzelli, H. Muriel","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-04T21:00:09Z","title":"The BL-Lac gamma-ray blazar PKS 0447-439 as a probable member of a group of galaxies at z=0.343"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.1831","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":"sha256:9ca2bffbcf76697be861071948d53aca5187bbac50984028656704484ddc25bb","target":"record","created_at":"2026-05-18T01:41:23Z","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":"5df9175aaa8ddef61776ec7b32ae053e57fec84f6c3a26a697e725ad0b970892","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-04T21:00:09Z","title_canon_sha256":"74fe921560f1a0e21429562a4da896ad6806728e9f006714843429f6c3ac5a7f"},"schema_version":"1.0","source":{"id":"1412.1831","kind":"arxiv","version":1}},"canonical_sha256":"c6c682d641dd75cd860ae498c7662180526c66e5c67412f775bf5ba442e8d418","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6c682d641dd75cd860ae498c7662180526c66e5c67412f775bf5ba442e8d418","first_computed_at":"2026-05-18T01:41:23.119665Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:23.119665Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OqfesLDdbSu5dnycw+k0yn8MGBdzFXcdmFDdRQG3xum4A2C3/lPplbpc10KEDDwmfKQ87DMiUbK5Zysp550OBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:23.120290Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.1831","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ca2bffbcf76697be861071948d53aca5187bbac50984028656704484ddc25bb","sha256:16a80c60b7bd32622933a7fda2f56114d5ffbcd833c3a54ea4408a47476d8aa3"],"state_sha256":"7a570725bc5c197254a737e844290cfc7b3a1aa2218a82c7e88a09a69449199d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LAEiSXuOtnG6n3L1NEqRHmD2CmjF+GLAUHIv3tdvyU6uqlQ6nb710/a1qhpcqrjX7NzzVAYrW1oZcWsxz55PDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T18:10:46.054998Z","bundle_sha256":"e0749c3f047e1959b4e0f0a0a7c8581c816aab3c4b0fc61a8926c8eab57c4711"}}