{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:GDBD5TZQZQ2METOX3CYT46ZMVD","short_pith_number":"pith:GDBD5TZQ","canonical_record":{"source":{"id":"0904.2772","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-17T20:01:30Z","cross_cats_sorted":[],"title_canon_sha256":"3d31756fbcb1e6c9bcb795ed0a1b4edfbaa1c01e1f7715b12602734189a98cb8","abstract_canon_sha256":"d91f7a1ee4704e17483783229836d17cfa922cd255540634d7f7e26f507d0b9f"},"schema_version":"1.0"},"canonical_sha256":"30c23ecf30cc34c24dd7d8b13e7b2ca8dd7d34eb8ee82602e8b281f69b27092e","source":{"kind":"arxiv","id":"0904.2772","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0904.2772","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"arxiv_version","alias_value":"0904.2772v2","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.2772","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"pith_short_12","alias_value":"GDBD5TZQZQ2M","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"GDBD5TZQZQ2METOX","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"GDBD5TZQ","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:GDBD5TZQZQ2METOX3CYT46ZMVD","target":"record","payload":{"canonical_record":{"source":{"id":"0904.2772","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-17T20:01:30Z","cross_cats_sorted":[],"title_canon_sha256":"3d31756fbcb1e6c9bcb795ed0a1b4edfbaa1c01e1f7715b12602734189a98cb8","abstract_canon_sha256":"d91f7a1ee4704e17483783229836d17cfa922cd255540634d7f7e26f507d0b9f"},"schema_version":"1.0"},"canonical_sha256":"30c23ecf30cc34c24dd7d8b13e7b2ca8dd7d34eb8ee82602e8b281f69b27092e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:43.450787Z","signature_b64":"MEeK5cTFL+ZWubvyUWb65MQr1Y7xfzUVqKjpRI+aYDbvtKRgw+qRQTQTHuC5ym3dlF2ehMM9UAQFo4CWsZ9MAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"30c23ecf30cc34c24dd7d8b13e7b2ca8dd7d34eb8ee82602e8b281f69b27092e","last_reissued_at":"2026-05-18T04:29:43.450177Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:43.450177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0904.2772","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":"2026-05-18T04:29:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UrtU2hFiTkkYbuGDuAJH0HbVYh4odIBIwNTCYbUEOti6MgdyG8B0AOjgwA5qv8Cd8+ThURyFnSnFXare8hPzCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:09:48.704737Z"},"content_sha256":"c5f7b0dda794dd36864db0dab2a48bf9760d613f3a3d14a4f3ea4cab27ec3f33","schema_version":"1.0","event_id":"sha256:c5f7b0dda794dd36864db0dab2a48bf9760d613f3a3d14a4f3ea4cab27ec3f33"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:GDBD5TZQZQ2METOX3CYT46ZMVD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray Sources and Their Optical Counterparts in the Galactic Globular Cluster M12 (NGC 6218)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Albert K. H. Kong, Cees Bassa, David Pooley, Frank Verbunt, Scott F. Anderson, Ting-Ni Lu, Walter H. G. Lewin","submitted_at":"2009-04-17T20:01:30Z","abstract_excerpt":"We study a Chandra X-ray Observatory ACIS-S observation of the Galactic globular clusterM12. With a 26 ks exposure time, we detect 6 X-ray sources inside the half-mass radius (2.16 arcminutes) of which two are inside the core radius (0.72 arcminutes) of the cluster. If we assume these sources are all associated with globular cluster M12, the luminosity L_{X} among these sources between 0.3-7.0 keV varies roughly from 10^{30} to 10^{32} ergs s^{-1}. For identification, we also analyzed the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) and Wide Field and Planetary Camera 2 (WFPC"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.2772","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":"2026-05-18T04:29:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ibr7mh2xKxY3C6Z/QbCgoq0sfoTJs5MumEuSSZJ0h88HVeP6ImmmbSSaFAuM3TRYK83MbvsJwENxhM9wciUIAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:09:48.705100Z"},"content_sha256":"e97c5045d559e27aab45d511738441f4c56d5f9ec72035c3bc2756c4f8a995d9","schema_version":"1.0","event_id":"sha256:e97c5045d559e27aab45d511738441f4c56d5f9ec72035c3bc2756c4f8a995d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GDBD5TZQZQ2METOX3CYT46ZMVD/bundle.json","state_url":"https://pith.science/pith/GDBD5TZQZQ2METOX3CYT46ZMVD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GDBD5TZQZQ2METOX3CYT46ZMVD/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":"2026-06-02T11:09:48Z","links":{"resolver":"https://pith.science/pith/GDBD5TZQZQ2METOX3CYT46ZMVD","bundle":"https://pith.science/pith/GDBD5TZQZQ2METOX3CYT46ZMVD/bundle.json","state":"https://pith.science/pith/GDBD5TZQZQ2METOX3CYT46ZMVD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GDBD5TZQZQ2METOX3CYT46ZMVD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:GDBD5TZQZQ2METOX3CYT46ZMVD","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":"d91f7a1ee4704e17483783229836d17cfa922cd255540634d7f7e26f507d0b9f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-17T20:01:30Z","title_canon_sha256":"3d31756fbcb1e6c9bcb795ed0a1b4edfbaa1c01e1f7715b12602734189a98cb8"},"schema_version":"1.0","source":{"id":"0904.2772","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0904.2772","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"arxiv_version","alias_value":"0904.2772v2","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.2772","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"pith_short_12","alias_value":"GDBD5TZQZQ2M","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"GDBD5TZQZQ2METOX","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"GDBD5TZQ","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:e97c5045d559e27aab45d511738441f4c56d5f9ec72035c3bc2756c4f8a995d9","target":"graph","created_at":"2026-05-18T04:29:43Z","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 study a Chandra X-ray Observatory ACIS-S observation of the Galactic globular clusterM12. With a 26 ks exposure time, we detect 6 X-ray sources inside the half-mass radius (2.16 arcminutes) of which two are inside the core radius (0.72 arcminutes) of the cluster. If we assume these sources are all associated with globular cluster M12, the luminosity L_{X} among these sources between 0.3-7.0 keV varies roughly from 10^{30} to 10^{32} ergs s^{-1}. For identification, we also analyzed the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) and Wide Field and Planetary Camera 2 (WFPC","authors_text":"Albert K. H. Kong, Cees Bassa, David Pooley, Frank Verbunt, Scott F. Anderson, Ting-Ni Lu, Walter H. G. Lewin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-17T20:01:30Z","title":"X-ray Sources and Their Optical Counterparts in the Galactic Globular Cluster M12 (NGC 6218)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.2772","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:c5f7b0dda794dd36864db0dab2a48bf9760d613f3a3d14a4f3ea4cab27ec3f33","target":"record","created_at":"2026-05-18T04:29:43Z","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":"d91f7a1ee4704e17483783229836d17cfa922cd255540634d7f7e26f507d0b9f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-17T20:01:30Z","title_canon_sha256":"3d31756fbcb1e6c9bcb795ed0a1b4edfbaa1c01e1f7715b12602734189a98cb8"},"schema_version":"1.0","source":{"id":"0904.2772","kind":"arxiv","version":2}},"canonical_sha256":"30c23ecf30cc34c24dd7d8b13e7b2ca8dd7d34eb8ee82602e8b281f69b27092e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"30c23ecf30cc34c24dd7d8b13e7b2ca8dd7d34eb8ee82602e8b281f69b27092e","first_computed_at":"2026-05-18T04:29:43.450177Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:43.450177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MEeK5cTFL+ZWubvyUWb65MQr1Y7xfzUVqKjpRI+aYDbvtKRgw+qRQTQTHuC5ym3dlF2ehMM9UAQFo4CWsZ9MAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:43.450787Z","signed_message":"canonical_sha256_bytes"},"source_id":"0904.2772","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c5f7b0dda794dd36864db0dab2a48bf9760d613f3a3d14a4f3ea4cab27ec3f33","sha256:e97c5045d559e27aab45d511738441f4c56d5f9ec72035c3bc2756c4f8a995d9"],"state_sha256":"a5c5281e7e7fe1dde443e6ee88c19d9575f140210a358d000ca32a5f652e84f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oAp4N7guPPmy4JOxyZgsQ7j5nrrLjIhdH3CaB1Do90pWEre6hkJ6B05a8+r/knc7eOexsXBy3pAMprs3+vKrBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T11:09:48.710221Z","bundle_sha256":"5afa9b55f15a8c17d67ff1411d7b952730c63126f644839c3cdaa4adafe39378"}}