{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:TJSJJHLRA5GABQQESSLSDJ3RTI","short_pith_number":"pith:TJSJJHLR","canonical_record":{"source":{"id":"1311.5561","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-21T21:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"8b8e9f972cde39a954962d50bdccf98cc1cedb1b4b4b3cb8338c854a66811dd7","abstract_canon_sha256":"0dcbb2a4bb7018fe6f176ada0710f9be4cd05bcce4c6b56fcf620bcf24eb73b8"},"schema_version":"1.0"},"canonical_sha256":"9a64949d71074c00c204949721a7719a20369bbe215611aa515f039fb2b91da0","source":{"kind":"arxiv","id":"1311.5561","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5561","created_at":"2026-05-18T01:46:07Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5561v1","created_at":"2026-05-18T01:46:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5561","created_at":"2026-05-18T01:46:07Z"},{"alias_kind":"pith_short_12","alias_value":"TJSJJHLRA5GA","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TJSJJHLRA5GABQQE","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TJSJJHLR","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:TJSJJHLRA5GABQQESSLSDJ3RTI","target":"record","payload":{"canonical_record":{"source":{"id":"1311.5561","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-21T21:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"8b8e9f972cde39a954962d50bdccf98cc1cedb1b4b4b3cb8338c854a66811dd7","abstract_canon_sha256":"0dcbb2a4bb7018fe6f176ada0710f9be4cd05bcce4c6b56fcf620bcf24eb73b8"},"schema_version":"1.0"},"canonical_sha256":"9a64949d71074c00c204949721a7719a20369bbe215611aa515f039fb2b91da0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:07.121541Z","signature_b64":"irpemuxouF0Rk+JP4p5anMllHXWpwAGJ7PBiCj1xyyuo0gAUkuz9HdVwgcbjELpPWUFmblgEbdVSnIwFXYcPCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a64949d71074c00c204949721a7719a20369bbe215611aa515f039fb2b91da0","last_reissued_at":"2026-05-18T01:46:07.121020Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:07.121020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.5561","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":"2026-05-18T01:46:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"43roxcmLnUvV5MskYame1+xOn+hBeQRHC0JtaX7PKRKhO7nXaN52breGGNbj54NKAypK0SLB6T8VrYE0yhZjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:19:27.687697Z"},"content_sha256":"9f38b71afb47081dbd2f911e338d5fbb542c5234f06ffdc024706bc602a6709c","schema_version":"1.0","event_id":"sha256:9f38b71afb47081dbd2f911e338d5fbb542c5234f06ffdc024706bc602a6709c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:TJSJJHLRA5GABQQESSLSDJ3RTI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Merger Shock in Abell 2034","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"((1) Australian Astronomical Observatory, (2) CfA, 3), (3) Swinburne, 4), (4) U. of Waterloo), Andrew M. Hopkins (1), Cheng-Jiun Ma (2, Christine Jones (2), Laurence P. David (2), Matt S. Owers (1), Paul E. J. Nulsen (2), Reinout J. van Weeren (2), Warrick J. Couch (1, William R. Forman (2)","submitted_at":"2013-11-21T21:00:03Z","abstract_excerpt":"We present a $250\\,$ks Chandra observation of the cluster merger A2034 with the aim of understanding the nature of a sharp edge previously characterized as a cold front. The new data reveal that the edge is coherent over a larger opening angle and is significantly more bow-shock-shaped than previously thought. Within $\\sim 27\\,$degrees about the axis of symmetry of the edge the density, temperature and pressure drop abruptly by factors of $1.83^{+0.09}_{-0.08}$, $1.85^{+0.41}_{-0.41}$ and $3.4^{+0.8}_{-0.7}$, respectively. This is inconsistent with the pressure equilibrium expected of a cold f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5561","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":"2026-05-18T01:46:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"43PWFv/bhdu5qsP7Wj3G6BlDgjijqLlAorKwMjoi/j+DVdtBeLQs3sYrKwZBwsV1Oh+SC+t+No1Yu1QkL3q9CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:19:27.688398Z"},"content_sha256":"5c9b1b0d8d64bfeff1e03ec4c91d04586b846ec621bc9e04ee141bcd6c374126","schema_version":"1.0","event_id":"sha256:5c9b1b0d8d64bfeff1e03ec4c91d04586b846ec621bc9e04ee141bcd6c374126"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TJSJJHLRA5GABQQESSLSDJ3RTI/bundle.json","state_url":"https://pith.science/pith/TJSJJHLRA5GABQQESSLSDJ3RTI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TJSJJHLRA5GABQQESSLSDJ3RTI/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":"2026-05-26T14:19:27Z","links":{"resolver":"https://pith.science/pith/TJSJJHLRA5GABQQESSLSDJ3RTI","bundle":"https://pith.science/pith/TJSJJHLRA5GABQQESSLSDJ3RTI/bundle.json","state":"https://pith.science/pith/TJSJJHLRA5GABQQESSLSDJ3RTI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TJSJJHLRA5GABQQESSLSDJ3RTI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:TJSJJHLRA5GABQQESSLSDJ3RTI","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":"0dcbb2a4bb7018fe6f176ada0710f9be4cd05bcce4c6b56fcf620bcf24eb73b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-21T21:00:03Z","title_canon_sha256":"8b8e9f972cde39a954962d50bdccf98cc1cedb1b4b4b3cb8338c854a66811dd7"},"schema_version":"1.0","source":{"id":"1311.5561","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5561","created_at":"2026-05-18T01:46:07Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5561v1","created_at":"2026-05-18T01:46:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5561","created_at":"2026-05-18T01:46:07Z"},{"alias_kind":"pith_short_12","alias_value":"TJSJJHLRA5GA","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TJSJJHLRA5GABQQE","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TJSJJHLR","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:5c9b1b0d8d64bfeff1e03ec4c91d04586b846ec621bc9e04ee141bcd6c374126","target":"graph","created_at":"2026-05-18T01:46:07Z","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":"We present a $250\\,$ks Chandra observation of the cluster merger A2034 with the aim of understanding the nature of a sharp edge previously characterized as a cold front. The new data reveal that the edge is coherent over a larger opening angle and is significantly more bow-shock-shaped than previously thought. Within $\\sim 27\\,$degrees about the axis of symmetry of the edge the density, temperature and pressure drop abruptly by factors of $1.83^{+0.09}_{-0.08}$, $1.85^{+0.41}_{-0.41}$ and $3.4^{+0.8}_{-0.7}$, respectively. This is inconsistent with the pressure equilibrium expected of a cold f","authors_text":"((1) Australian Astronomical Observatory, (2) CfA, 3), (3) Swinburne, 4), (4) U. of Waterloo), Andrew M. Hopkins (1), Cheng-Jiun Ma (2, Christine Jones (2), Laurence P. David (2), Matt S. Owers (1), Paul E. J. Nulsen (2), Reinout J. van Weeren (2), Warrick J. Couch (1, William R. Forman (2)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-21T21:00:03Z","title":"A Merger Shock in Abell 2034"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5561","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":"sha256:9f38b71afb47081dbd2f911e338d5fbb542c5234f06ffdc024706bc602a6709c","target":"record","created_at":"2026-05-18T01:46:07Z","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":"0dcbb2a4bb7018fe6f176ada0710f9be4cd05bcce4c6b56fcf620bcf24eb73b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-21T21:00:03Z","title_canon_sha256":"8b8e9f972cde39a954962d50bdccf98cc1cedb1b4b4b3cb8338c854a66811dd7"},"schema_version":"1.0","source":{"id":"1311.5561","kind":"arxiv","version":1}},"canonical_sha256":"9a64949d71074c00c204949721a7719a20369bbe215611aa515f039fb2b91da0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a64949d71074c00c204949721a7719a20369bbe215611aa515f039fb2b91da0","first_computed_at":"2026-05-18T01:46:07.121020Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:07.121020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"irpemuxouF0Rk+JP4p5anMllHXWpwAGJ7PBiCj1xyyuo0gAUkuz9HdVwgcbjELpPWUFmblgEbdVSnIwFXYcPCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:07.121541Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.5561","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f38b71afb47081dbd2f911e338d5fbb542c5234f06ffdc024706bc602a6709c","sha256:5c9b1b0d8d64bfeff1e03ec4c91d04586b846ec621bc9e04ee141bcd6c374126"],"state_sha256":"0996688c667f1c30643afe8672f53ca4232a5f875e5e22fe129f8644f4f10980"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vst1wkgwGOCKf5KmqHwREbkT0F5ODgM/Qpdq4BKZe7M2f+CdJOCW4jtSgkdTUgUbbpRuXNCd1b5J4cBG8R+eCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T14:19:27.692819Z","bundle_sha256":"005c8227a6bca1b998896388c2e336e2e4216e81cecdf938e3792890979b55e4"}}