{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KHLMGCGMIK23OEMS7LJVQADMTP","short_pith_number":"pith:KHLMGCGM","canonical_record":{"source":{"id":"1509.05749","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-09-18T19:03:48Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"4e797d4ae6bacae93d992b21fc8f731b0ccecad4291907e41c2f64cd09f4fa81","abstract_canon_sha256":"befa2a13c32932fe5d5b6814e4d399c9556ea38ab7dfa470e6b9a377dba4cf76"},"schema_version":"1.0"},"canonical_sha256":"51d6c308cc42b5b71192fad358006c9bdb303c9373e5e32699a55ee6bc63dec2","source":{"kind":"arxiv","id":"1509.05749","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05749","created_at":"2026-05-18T01:24:14Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05749v3","created_at":"2026-05-18T01:24:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05749","created_at":"2026-05-18T01:24:14Z"},{"alias_kind":"pith_short_12","alias_value":"KHLMGCGMIK23","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"KHLMGCGMIK23OEMS","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"KHLMGCGM","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KHLMGCGMIK23OEMS7LJVQADMTP","target":"record","payload":{"canonical_record":{"source":{"id":"1509.05749","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-09-18T19:03:48Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"4e797d4ae6bacae93d992b21fc8f731b0ccecad4291907e41c2f64cd09f4fa81","abstract_canon_sha256":"befa2a13c32932fe5d5b6814e4d399c9556ea38ab7dfa470e6b9a377dba4cf76"},"schema_version":"1.0"},"canonical_sha256":"51d6c308cc42b5b71192fad358006c9bdb303c9373e5e32699a55ee6bc63dec2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:14.213734Z","signature_b64":"xpZRZzz73lhjY+N9ZoLUQMvXPFpo7DuSsR5rvJLdBYgPdfgpHXZX8n39NgPgzt2gbLkpEc5xtgsWGIpCYmELBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51d6c308cc42b5b71192fad358006c9bdb303c9373e5e32699a55ee6bc63dec2","last_reissued_at":"2026-05-18T01:24:14.213212Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:14.213212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.05749","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:24:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aY8x6oJ5cr4ft2Uk9e/4qxTeWNW4e0HHuTr8xnzukP+BZDh4dtOqOrx6ygUf6RTbQsYqZFeCDlkhtZlsZ7ObAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:33:27.198722Z"},"content_sha256":"3d70fd8f93401388a25d4ebf088d9c975d477fd3ac2c146d48b982682168346e","schema_version":"1.0","event_id":"sha256:3d70fd8f93401388a25d4ebf088d9c975d477fd3ac2c146d48b982682168346e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KHLMGCGMIK23OEMS7LJVQADMTP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Young Stellar Objects in the Massive Star Forming Region W49","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Talat Saygac, Gozde Saral, Joseph L. Hora, Robert A. Gutermuth, Sarah E. Willis, Xavier P. Koenig","submitted_at":"2015-09-18T19:03:48Z","abstract_excerpt":"We present the initial results of our investigation of the star-forming complex W49, one of the youngest and most luminous massive star forming regions in our Galaxy. We used Spitzer/Infrared Array Camera (IRAC) data to investigate massive star formation with the primary objective to locate a representative set of protostars and the clusters of young stars that are forming around them. We present our source catalog with the mosaics from the IRAC data. In this study we used a combination of IRAC, MIPS, Two Micron All Sky Survey (2MASS) and UKIRT Deep Infrared Sky Survey (UKIDSS) data to identif"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05749","kind":"arxiv","version":3},"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":"2026-05-18T01:24:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JM1tJTI39Dl8Gt8N9oPW0LhDX0/6VOcebs3Ulyj65uA+gljsK063jzIK8x2lxN9lvWGh9xuq8GBvDjh2mUzQDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:33:27.199394Z"},"content_sha256":"f125e57e7e9439f1f6e099a9b106bb58e9b19aaa61b8a6973defead710580390","schema_version":"1.0","event_id":"sha256:f125e57e7e9439f1f6e099a9b106bb58e9b19aaa61b8a6973defead710580390"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KHLMGCGMIK23OEMS7LJVQADMTP/bundle.json","state_url":"https://pith.science/pith/KHLMGCGMIK23OEMS7LJVQADMTP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KHLMGCGMIK23OEMS7LJVQADMTP/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":"2026-05-28T15:33:27Z","links":{"resolver":"https://pith.science/pith/KHLMGCGMIK23OEMS7LJVQADMTP","bundle":"https://pith.science/pith/KHLMGCGMIK23OEMS7LJVQADMTP/bundle.json","state":"https://pith.science/pith/KHLMGCGMIK23OEMS7LJVQADMTP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KHLMGCGMIK23OEMS7LJVQADMTP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KHLMGCGMIK23OEMS7LJVQADMTP","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":"befa2a13c32932fe5d5b6814e4d399c9556ea38ab7dfa470e6b9a377dba4cf76","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-09-18T19:03:48Z","title_canon_sha256":"4e797d4ae6bacae93d992b21fc8f731b0ccecad4291907e41c2f64cd09f4fa81"},"schema_version":"1.0","source":{"id":"1509.05749","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05749","created_at":"2026-05-18T01:24:14Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05749v3","created_at":"2026-05-18T01:24:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05749","created_at":"2026-05-18T01:24:14Z"},{"alias_kind":"pith_short_12","alias_value":"KHLMGCGMIK23","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"KHLMGCGMIK23OEMS","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"KHLMGCGM","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:f125e57e7e9439f1f6e099a9b106bb58e9b19aaa61b8a6973defead710580390","target":"graph","created_at":"2026-05-18T01:24:14Z","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 the initial results of our investigation of the star-forming complex W49, one of the youngest and most luminous massive star forming regions in our Galaxy. We used Spitzer/Infrared Array Camera (IRAC) data to investigate massive star formation with the primary objective to locate a representative set of protostars and the clusters of young stars that are forming around them. We present our source catalog with the mosaics from the IRAC data. In this study we used a combination of IRAC, MIPS, Two Micron All Sky Survey (2MASS) and UKIRT Deep Infrared Sky Survey (UKIDSS) data to identif","authors_text":"A. Talat Saygac, Gozde Saral, Joseph L. Hora, Robert A. Gutermuth, Sarah E. Willis, Xavier P. Koenig","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-09-18T19:03:48Z","title":"Young Stellar Objects in the Massive Star Forming Region W49"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05749","kind":"arxiv","version":3},"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":"sha256:3d70fd8f93401388a25d4ebf088d9c975d477fd3ac2c146d48b982682168346e","target":"record","created_at":"2026-05-18T01:24:14Z","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":"befa2a13c32932fe5d5b6814e4d399c9556ea38ab7dfa470e6b9a377dba4cf76","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-09-18T19:03:48Z","title_canon_sha256":"4e797d4ae6bacae93d992b21fc8f731b0ccecad4291907e41c2f64cd09f4fa81"},"schema_version":"1.0","source":{"id":"1509.05749","kind":"arxiv","version":3}},"canonical_sha256":"51d6c308cc42b5b71192fad358006c9bdb303c9373e5e32699a55ee6bc63dec2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51d6c308cc42b5b71192fad358006c9bdb303c9373e5e32699a55ee6bc63dec2","first_computed_at":"2026-05-18T01:24:14.213212Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:14.213212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xpZRZzz73lhjY+N9ZoLUQMvXPFpo7DuSsR5rvJLdBYgPdfgpHXZX8n39NgPgzt2gbLkpEc5xtgsWGIpCYmELBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:14.213734Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.05749","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d70fd8f93401388a25d4ebf088d9c975d477fd3ac2c146d48b982682168346e","sha256:f125e57e7e9439f1f6e099a9b106bb58e9b19aaa61b8a6973defead710580390"],"state_sha256":"0554013d014fa15e38f164f81dd8a6d4b5844a93e037281f41cf12bb2a1b5662"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qB2WBXPoPAkJBhFHCSt1Fa1AnBh3BUvA2k5XO2uN1erkBmmrScS1MZrwUkf+yajht5fcJl1jCDeNcC60l7V4Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T15:33:27.202834Z","bundle_sha256":"67f120165f1c3f9475577e7af321765e3bbcb28c6c9b0f5c5d0da10b62ff89fc"}}