{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EQDFXTNLCK6PN7VB4WNHS4IXTH","short_pith_number":"pith:EQDFXTNL","canonical_record":{"source":{"id":"1109.4255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-20T09:40:28Z","cross_cats_sorted":[],"title_canon_sha256":"d21eeccfa9f31ed5c2f33beb0357e3f012db82d2c4177b586e53633a8505cfa3","abstract_canon_sha256":"dedf4b9cf1b3ecf7ba8927e91b9d64fede05b5f13ebc59ddd9a25417b5954f95"},"schema_version":"1.0"},"canonical_sha256":"24065bcdab12bcf6fea1e59a79711799f178e9e1d74fca07d1f343d70cdd4927","source":{"kind":"arxiv","id":"1109.4255","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4255","created_at":"2026-05-18T04:12:43Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4255v1","created_at":"2026-05-18T04:12:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4255","created_at":"2026-05-18T04:12:43Z"},{"alias_kind":"pith_short_12","alias_value":"EQDFXTNLCK6P","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EQDFXTNLCK6PN7VB","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EQDFXTNL","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EQDFXTNLCK6PN7VB4WNHS4IXTH","target":"record","payload":{"canonical_record":{"source":{"id":"1109.4255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-20T09:40:28Z","cross_cats_sorted":[],"title_canon_sha256":"d21eeccfa9f31ed5c2f33beb0357e3f012db82d2c4177b586e53633a8505cfa3","abstract_canon_sha256":"dedf4b9cf1b3ecf7ba8927e91b9d64fede05b5f13ebc59ddd9a25417b5954f95"},"schema_version":"1.0"},"canonical_sha256":"24065bcdab12bcf6fea1e59a79711799f178e9e1d74fca07d1f343d70cdd4927","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:12:43.756768Z","signature_b64":"xjAIIkqRSC8yYbv/ol9HL6iXHnivsv+kv7Hr6etxUVY+zo9Rnnv/OYRtRk9bfP8yUh1I4FLtRnm3gBHYUtpkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24065bcdab12bcf6fea1e59a79711799f178e9e1d74fca07d1f343d70cdd4927","last_reissued_at":"2026-05-18T04:12:43.756018Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:12:43.756018Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.4255","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":"2026-05-18T04:12:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1R9OnwF8bRw4Wikgkx60CZua2rbrhJgEmotptAYUNE31oCHyjhvntLvQ6tRBDuA4W4H4+Lc+HmP7voNLdQKmDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T12:25:12.189175Z"},"content_sha256":"5715e2ead0dccce38fcbeec92eefa75d72c3378ccc5d47784b74d8e1026ea776","schema_version":"1.0","event_id":"sha256:5715e2ead0dccce38fcbeec92eefa75d72c3378ccc5d47784b74d8e1026ea776"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EQDFXTNLCK6PN7VB4WNHS4IXTH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NIR view on young stellar clusters in nearby spirals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"H. Dottori, P. Grosbol","submitted_at":"2011-09-20T09:40:28Z","abstract_excerpt":"Observations in the near-infrared (NIR) allow a detailed study of young stellar clusters in grand-design spiral galaxies which in visual bands often are highly obscured by dust lanes along the arms. Deep JHK-maps of 10 spirals were obtained with HAWK-I/VLT. Data for NGC 2997 are presented here to illustrate the general results for the sample.\n  The (H-K)-(J-H) diagrams suggest that most stellar clusters younger than 7 Myr are significantly attenuated by dust with visual extinctions reaching 7 mag. A gap between younger and older cluster complexes in the (J-K)-Mk diagram indicates a rapid reduc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4255","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":"2026-05-18T04:12:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rvnoF7+muHy9pgavFd93eiezNTzA+Zfjscy34Q5bxv5ttmp9yveJhbQsTrqJh98BBN+ZtTqX4ZqnFbjFIzhEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T12:25:12.189549Z"},"content_sha256":"057ff2d71a0bedaaccf8b3d3ba91f5c181c70b8e9419ddf8eb04e2b1fe434816","schema_version":"1.0","event_id":"sha256:057ff2d71a0bedaaccf8b3d3ba91f5c181c70b8e9419ddf8eb04e2b1fe434816"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH/bundle.json","state_url":"https://pith.science/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH/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":"2026-06-25T12:25:12Z","links":{"resolver":"https://pith.science/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH","bundle":"https://pith.science/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH/bundle.json","state":"https://pith.science/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EQDFXTNLCK6PN7VB4WNHS4IXTH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EQDFXTNLCK6PN7VB4WNHS4IXTH","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":"dedf4b9cf1b3ecf7ba8927e91b9d64fede05b5f13ebc59ddd9a25417b5954f95","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-20T09:40:28Z","title_canon_sha256":"d21eeccfa9f31ed5c2f33beb0357e3f012db82d2c4177b586e53633a8505cfa3"},"schema_version":"1.0","source":{"id":"1109.4255","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4255","created_at":"2026-05-18T04:12:43Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4255v1","created_at":"2026-05-18T04:12:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4255","created_at":"2026-05-18T04:12:43Z"},{"alias_kind":"pith_short_12","alias_value":"EQDFXTNLCK6P","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EQDFXTNLCK6PN7VB","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EQDFXTNL","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:057ff2d71a0bedaaccf8b3d3ba91f5c181c70b8e9419ddf8eb04e2b1fe434816","target":"graph","created_at":"2026-05-18T04:12:43Z","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":"Observations in the near-infrared (NIR) allow a detailed study of young stellar clusters in grand-design spiral galaxies which in visual bands often are highly obscured by dust lanes along the arms. Deep JHK-maps of 10 spirals were obtained with HAWK-I/VLT. Data for NGC 2997 are presented here to illustrate the general results for the sample.\n  The (H-K)-(J-H) diagrams suggest that most stellar clusters younger than 7 Myr are significantly attenuated by dust with visual extinctions reaching 7 mag. A gap between younger and older cluster complexes in the (J-K)-Mk diagram indicates a rapid reduc","authors_text":"H. Dottori, P. Grosbol","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-20T09:40:28Z","title":"NIR view on young stellar clusters in nearby spirals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4255","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":"sha256:5715e2ead0dccce38fcbeec92eefa75d72c3378ccc5d47784b74d8e1026ea776","target":"record","created_at":"2026-05-18T04:12:43Z","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":"dedf4b9cf1b3ecf7ba8927e91b9d64fede05b5f13ebc59ddd9a25417b5954f95","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-20T09:40:28Z","title_canon_sha256":"d21eeccfa9f31ed5c2f33beb0357e3f012db82d2c4177b586e53633a8505cfa3"},"schema_version":"1.0","source":{"id":"1109.4255","kind":"arxiv","version":1}},"canonical_sha256":"24065bcdab12bcf6fea1e59a79711799f178e9e1d74fca07d1f343d70cdd4927","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24065bcdab12bcf6fea1e59a79711799f178e9e1d74fca07d1f343d70cdd4927","first_computed_at":"2026-05-18T04:12:43.756018Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:43.756018Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xjAIIkqRSC8yYbv/ol9HL6iXHnivsv+kv7Hr6etxUVY+zo9Rnnv/OYRtRk9bfP8yUh1I4FLtRnm3gBHYUtpkBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:43.756768Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.4255","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5715e2ead0dccce38fcbeec92eefa75d72c3378ccc5d47784b74d8e1026ea776","sha256:057ff2d71a0bedaaccf8b3d3ba91f5c181c70b8e9419ddf8eb04e2b1fe434816"],"state_sha256":"f569d8eb6dd1b55741d989b88fa224b4396c597142a50dae37e25e999441ad8a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aODTO+PzNdidQeVeCjXwd16/32X9mF6xPH012rxiZlRkl6G5meKFKWQ1+PPWTeU4ryK1O7jQJ0CidAx93SdGCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T12:25:12.191457Z","bundle_sha256":"10bd9cb47b4e863e8333d700183b2e2abe10d7fe0341e9e63bce4e63796470a9"}}