{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:4HGF7VOFBM5IBR43JV3OXU57A3","short_pith_number":"pith:4HGF7VOF","canonical_record":{"source":{"id":"0907.0674","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2009-07-03T17:11:31Z","cross_cats_sorted":[],"title_canon_sha256":"5679be9b94b17fd388885032367c26ac67ca73e71938a68c57afdc5bdae4cfc9","abstract_canon_sha256":"ce7c3098f00616e7205fdd8d8e949ef1b0ff9460b53e8be4336ed562c66f6b0e"},"schema_version":"1.0"},"canonical_sha256":"e1cc5fd5c50b3a80c79b4d76ebd3bf06d444d97a2264f82a065c7b5af3624415","source":{"kind":"arxiv","id":"0907.0674","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.0674","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"arxiv_version","alias_value":"0907.0674v2","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.0674","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"pith_short_12","alias_value":"4HGF7VOFBM5I","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"4HGF7VOFBM5IBR43","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"4HGF7VOF","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:4HGF7VOFBM5IBR43JV3OXU57A3","target":"record","payload":{"canonical_record":{"source":{"id":"0907.0674","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2009-07-03T17:11:31Z","cross_cats_sorted":[],"title_canon_sha256":"5679be9b94b17fd388885032367c26ac67ca73e71938a68c57afdc5bdae4cfc9","abstract_canon_sha256":"ce7c3098f00616e7205fdd8d8e949ef1b0ff9460b53e8be4336ed562c66f6b0e"},"schema_version":"1.0"},"canonical_sha256":"e1cc5fd5c50b3a80c79b4d76ebd3bf06d444d97a2264f82a065c7b5af3624415","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:05.408211Z","signature_b64":"7UtLDm13otwNOGVIGf1HeK3yfbLuEsL0auAFBQIgpAJyIg0fJcSkOp00hDRooIIFPudMk9GeEJTKsrouZMwYCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e1cc5fd5c50b3a80c79b4d76ebd3bf06d444d97a2264f82a065c7b5af3624415","last_reissued_at":"2026-05-18T02:13:05.407786Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:05.407786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.0674","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":"2026-05-18T02:13:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pig5k1bLaerQ/i0u8zcgJknL+6bfhkEawLJKvHaZtVZbxKm6zOGa68Go7IA4BvOmabcYkKhctSvIe778dwAoDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:58:10.023280Z"},"content_sha256":"8a6544b8dbceb5a9e0c2b181a695e9434d28f45bfb8261a77c8879cd36c48e22","schema_version":"1.0","event_id":"sha256:8a6544b8dbceb5a9e0c2b181a695e9434d28f45bfb8261a77c8879cd36c48e22"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:4HGF7VOFBM5IBR43JV3OXU57A3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single-particle-sensitive imaging of freely propagating ultracold atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. Perrin, Ch. Koller, J. Rottmann, J. Schmiedmayer, R. B\\\"ucker, S. Manz, T. Betz, T. Plisson, T. Schumm","submitted_at":"2009-07-03T17:11:31Z","abstract_excerpt":"We present a novel imaging system for ultracold quantum gases in expansion. After release from a confining potential, atoms fall through a sheet of resonant excitation laser light and the emitted fluorescence photons are imaged onto an amplified CCD camera using a high numerical aperture optical system. The imaging system reaches an extraordinary dynamic range, not attainable with conventional absorption imaging. We demonstrate single-atom detection for dilute atomic clouds with high efficiency where at the same time dense Bose-Einstein condensates can be imaged without saturation or distortio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.0674","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":"2026-05-18T02:13:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q+EC9lL+CZH1YjHlMQULSQx9u/vBbcQ+8YSb141AjPRjKcWr8CuyaDbMZKid0xhzmhCI0AFaGaCFF9DEVbF4AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:58:10.023934Z"},"content_sha256":"6710dde8873320b838ed34751979d6d63413acc8ec8e453217698b00cced6a1d","schema_version":"1.0","event_id":"sha256:6710dde8873320b838ed34751979d6d63413acc8ec8e453217698b00cced6a1d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4HGF7VOFBM5IBR43JV3OXU57A3/bundle.json","state_url":"https://pith.science/pith/4HGF7VOFBM5IBR43JV3OXU57A3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4HGF7VOFBM5IBR43JV3OXU57A3/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":"2026-05-28T21:58:10Z","links":{"resolver":"https://pith.science/pith/4HGF7VOFBM5IBR43JV3OXU57A3","bundle":"https://pith.science/pith/4HGF7VOFBM5IBR43JV3OXU57A3/bundle.json","state":"https://pith.science/pith/4HGF7VOFBM5IBR43JV3OXU57A3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4HGF7VOFBM5IBR43JV3OXU57A3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:4HGF7VOFBM5IBR43JV3OXU57A3","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":"ce7c3098f00616e7205fdd8d8e949ef1b0ff9460b53e8be4336ed562c66f6b0e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2009-07-03T17:11:31Z","title_canon_sha256":"5679be9b94b17fd388885032367c26ac67ca73e71938a68c57afdc5bdae4cfc9"},"schema_version":"1.0","source":{"id":"0907.0674","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.0674","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"arxiv_version","alias_value":"0907.0674v2","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.0674","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"pith_short_12","alias_value":"4HGF7VOFBM5I","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"4HGF7VOFBM5IBR43","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"4HGF7VOF","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:6710dde8873320b838ed34751979d6d63413acc8ec8e453217698b00cced6a1d","target":"graph","created_at":"2026-05-18T02:13:05Z","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"},"paper":{"abstract_excerpt":"We present a novel imaging system for ultracold quantum gases in expansion. After release from a confining potential, atoms fall through a sheet of resonant excitation laser light and the emitted fluorescence photons are imaged onto an amplified CCD camera using a high numerical aperture optical system. The imaging system reaches an extraordinary dynamic range, not attainable with conventional absorption imaging. We demonstrate single-atom detection for dilute atomic clouds with high efficiency where at the same time dense Bose-Einstein condensates can be imaged without saturation or distortio","authors_text":"A. Perrin, Ch. Koller, J. Rottmann, J. Schmiedmayer, R. B\\\"ucker, S. Manz, T. Betz, T. Plisson, T. Schumm","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2009-07-03T17:11:31Z","title":"Single-particle-sensitive imaging of freely propagating ultracold atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.0674","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":"sha256:8a6544b8dbceb5a9e0c2b181a695e9434d28f45bfb8261a77c8879cd36c48e22","target":"record","created_at":"2026-05-18T02:13:05Z","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":"ce7c3098f00616e7205fdd8d8e949ef1b0ff9460b53e8be4336ed562c66f6b0e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2009-07-03T17:11:31Z","title_canon_sha256":"5679be9b94b17fd388885032367c26ac67ca73e71938a68c57afdc5bdae4cfc9"},"schema_version":"1.0","source":{"id":"0907.0674","kind":"arxiv","version":2}},"canonical_sha256":"e1cc5fd5c50b3a80c79b4d76ebd3bf06d444d97a2264f82a065c7b5af3624415","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e1cc5fd5c50b3a80c79b4d76ebd3bf06d444d97a2264f82a065c7b5af3624415","first_computed_at":"2026-05-18T02:13:05.407786Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:05.407786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7UtLDm13otwNOGVIGf1HeK3yfbLuEsL0auAFBQIgpAJyIg0fJcSkOp00hDRooIIFPudMk9GeEJTKsrouZMwYCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:05.408211Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.0674","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a6544b8dbceb5a9e0c2b181a695e9434d28f45bfb8261a77c8879cd36c48e22","sha256:6710dde8873320b838ed34751979d6d63413acc8ec8e453217698b00cced6a1d"],"state_sha256":"c3d6aff66427020ef30ed3b71145e6b4dde29e4c24c93f3dac9af242f275a6ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wqP+w0d9ugCSPf4xRZ3YZjX84Hs1+e4z/bPLOXaQGWqW2F8Cgvas2kc65hx0yLbSNXIw4GuRl/3IHkzrsgH4Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:58:10.027143Z","bundle_sha256":"bcf7740b35b27241df12e2d58446a81d3e3dad0ecbb9bf62c1b1f0549af4b858"}}