{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:JJHHFAJFKHWHAK5OWG6UQLPLUC","short_pith_number":"pith:JJHHFAJF","canonical_record":{"source":{"id":"1109.2175","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T23:29:31Z","cross_cats_sorted":[],"title_canon_sha256":"e831c438c01ad5e79110a983e772ec20064927349f8b6a2aa3b3bb2abaab7ac0","abstract_canon_sha256":"6e69132ddfb95d61cdb823d7d69b41994b2c294ae71dc2146d9297db409c0409"},"schema_version":"1.0"},"canonical_sha256":"4a4e72812551ec702baeb1bd482deba0b82cb909c19f6d7562c0c08707b86225","source":{"kind":"arxiv","id":"1109.2175","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.2175","created_at":"2026-05-18T02:00:36Z"},{"alias_kind":"arxiv_version","alias_value":"1109.2175v1","created_at":"2026-05-18T02:00:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.2175","created_at":"2026-05-18T02:00:36Z"},{"alias_kind":"pith_short_12","alias_value":"JJHHFAJFKHWH","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JJHHFAJFKHWHAK5O","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JJHHFAJF","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:JJHHFAJFKHWHAK5OWG6UQLPLUC","target":"record","payload":{"canonical_record":{"source":{"id":"1109.2175","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T23:29:31Z","cross_cats_sorted":[],"title_canon_sha256":"e831c438c01ad5e79110a983e772ec20064927349f8b6a2aa3b3bb2abaab7ac0","abstract_canon_sha256":"6e69132ddfb95d61cdb823d7d69b41994b2c294ae71dc2146d9297db409c0409"},"schema_version":"1.0"},"canonical_sha256":"4a4e72812551ec702baeb1bd482deba0b82cb909c19f6d7562c0c08707b86225","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:36.877586Z","signature_b64":"Er6wuHmkMlXldYdI1L2Rn1sOhPLD1/yoBAIe+lRUeYJuUkRlmHQGYE+inXwHDhHqt+mpwKMX4dBZ2e7dVCrtDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a4e72812551ec702baeb1bd482deba0b82cb909c19f6d7562c0c08707b86225","last_reissued_at":"2026-05-18T02:00:36.876848Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:36.876848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.2175","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":"2026-05-18T02:00:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8SpdFhEGhd4zJyvGWnrnDib0jEx0Z1CiGD8CIr5JxPHu1avbq+p8mh5vwVTGH4CUj8wrj/p5Rz9ajrL58WDsDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:42:48.885725Z"},"content_sha256":"e1ad50e6ffdab5e632f507e46292ade3e81a72fec0296fce1cc9edc8cb14ff08","schema_version":"1.0","event_id":"sha256:e1ad50e6ffdab5e632f507e46292ade3e81a72fec0296fce1cc9edc8cb14ff08"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:JJHHFAJFKHWHAK5OWG6UQLPLUC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HST Observations of the Stellar Distribution Near Sgr A*","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"F. Yusef-Zadeh, H. Bushouse, M. Wardle","submitted_at":"2011-09-09T23:29:31Z","abstract_excerpt":"We present HST/NICMOS data to study the surface brightness distribution of stellar light within the inner 10\" of Sgr A* at 1.4, 1.7 and 1.9 microns. We use these data to independently examine the surface brightness distribution that had been measured previously with NICMOS and to determine whether there is a drop in the surface density of stars very near Sgr A*. Our analysis confirms that a previously reported drop in the surface brightness within 0.8\" of Sgr A* is an artifact of bright and massive stars near that radius. We also show that the surface brightness profile within 5\" or ~0.2 pc of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.2175","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":"2026-05-18T02:00:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ox0sqb+2PDN3V87Esw65EqmoVUk5oCGbXAbUxfW338Ixo5lGfIlw3W0NhXPwh3ZSi43EqZNtk6eGrdUFhx0nCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:42:48.886373Z"},"content_sha256":"991a74fcc46455172bfcfc98f092a1ff36d8e774a8bafe64f13416c168286b53","schema_version":"1.0","event_id":"sha256:991a74fcc46455172bfcfc98f092a1ff36d8e774a8bafe64f13416c168286b53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC/bundle.json","state_url":"https://pith.science/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC/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":"2026-05-31T08:42:48Z","links":{"resolver":"https://pith.science/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC","bundle":"https://pith.science/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC/bundle.json","state":"https://pith.science/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JJHHFAJFKHWHAK5OWG6UQLPLUC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:JJHHFAJFKHWHAK5OWG6UQLPLUC","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":"6e69132ddfb95d61cdb823d7d69b41994b2c294ae71dc2146d9297db409c0409","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T23:29:31Z","title_canon_sha256":"e831c438c01ad5e79110a983e772ec20064927349f8b6a2aa3b3bb2abaab7ac0"},"schema_version":"1.0","source":{"id":"1109.2175","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.2175","created_at":"2026-05-18T02:00:36Z"},{"alias_kind":"arxiv_version","alias_value":"1109.2175v1","created_at":"2026-05-18T02:00:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.2175","created_at":"2026-05-18T02:00:36Z"},{"alias_kind":"pith_short_12","alias_value":"JJHHFAJFKHWH","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JJHHFAJFKHWHAK5O","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JJHHFAJF","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:991a74fcc46455172bfcfc98f092a1ff36d8e774a8bafe64f13416c168286b53","target":"graph","created_at":"2026-05-18T02:00:36Z","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 HST/NICMOS data to study the surface brightness distribution of stellar light within the inner 10\" of Sgr A* at 1.4, 1.7 and 1.9 microns. We use these data to independently examine the surface brightness distribution that had been measured previously with NICMOS and to determine whether there is a drop in the surface density of stars very near Sgr A*. Our analysis confirms that a previously reported drop in the surface brightness within 0.8\" of Sgr A* is an artifact of bright and massive stars near that radius. We also show that the surface brightness profile within 5\" or ~0.2 pc of","authors_text":"F. Yusef-Zadeh, H. Bushouse, M. Wardle","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T23:29:31Z","title":"HST Observations of the Stellar Distribution Near Sgr A*"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.2175","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:e1ad50e6ffdab5e632f507e46292ade3e81a72fec0296fce1cc9edc8cb14ff08","target":"record","created_at":"2026-05-18T02:00:36Z","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":"6e69132ddfb95d61cdb823d7d69b41994b2c294ae71dc2146d9297db409c0409","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T23:29:31Z","title_canon_sha256":"e831c438c01ad5e79110a983e772ec20064927349f8b6a2aa3b3bb2abaab7ac0"},"schema_version":"1.0","source":{"id":"1109.2175","kind":"arxiv","version":1}},"canonical_sha256":"4a4e72812551ec702baeb1bd482deba0b82cb909c19f6d7562c0c08707b86225","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a4e72812551ec702baeb1bd482deba0b82cb909c19f6d7562c0c08707b86225","first_computed_at":"2026-05-18T02:00:36.876848Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:36.876848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Er6wuHmkMlXldYdI1L2Rn1sOhPLD1/yoBAIe+lRUeYJuUkRlmHQGYE+inXwHDhHqt+mpwKMX4dBZ2e7dVCrtDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:36.877586Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.2175","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e1ad50e6ffdab5e632f507e46292ade3e81a72fec0296fce1cc9edc8cb14ff08","sha256:991a74fcc46455172bfcfc98f092a1ff36d8e774a8bafe64f13416c168286b53"],"state_sha256":"8ff70f412fb6b987ca82b3d909aa37fcfb642f4f5e0c8e1d92bb7e1b22827dbb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u7sct06dVEEkiJuTcNjmPmqfrdzEhNvi+0JHJ7cnRzeZBICxHilWrZn0QYTu+gCEVow/P945x+WKClYRaRrJAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T08:42:48.889434Z","bundle_sha256":"e9f23a8f4dcce3f53185bd743a470c9c4657e313de5f635e1149068c3c31d054"}}