{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:HFWJYACCS4APKWPB2OSMIAYNVE","short_pith_number":"pith:HFWJYACC","canonical_record":{"source":{"id":"0803.2840","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-19T16:41:03Z","cross_cats_sorted":[],"title_canon_sha256":"7ad90cc6deed54d482c5fb9d516edd72b8549e861e355f1a7e1a52eaeaede308","abstract_canon_sha256":"dc9bd3b61d85d9430217a0a885b39090584b1866a0e549b23e7a916a6ad07858"},"schema_version":"1.0"},"canonical_sha256":"396c9c00429700f559e1d3a4c4030da930f9ee8d3117cc75feda46f1afd81389","source":{"kind":"arxiv","id":"0803.2840","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.2840","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"arxiv_version","alias_value":"0803.2840v1","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.2840","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"pith_short_12","alias_value":"HFWJYACCS4AP","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"pith_short_16","alias_value":"HFWJYACCS4APKWPB","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"pith_short_8","alias_value":"HFWJYACC","created_at":"2026-07-04T17:09:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:HFWJYACCS4APKWPB2OSMIAYNVE","target":"record","payload":{"canonical_record":{"source":{"id":"0803.2840","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-19T16:41:03Z","cross_cats_sorted":[],"title_canon_sha256":"7ad90cc6deed54d482c5fb9d516edd72b8549e861e355f1a7e1a52eaeaede308","abstract_canon_sha256":"dc9bd3b61d85d9430217a0a885b39090584b1866a0e549b23e7a916a6ad07858"},"schema_version":"1.0"},"canonical_sha256":"396c9c00429700f559e1d3a4c4030da930f9ee8d3117cc75feda46f1afd81389","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:09:53.736117Z","signature_b64":"8M5Hj142vj5xsuDlSX/y6FRnnOzwLOZyOWED08CY+dEhP6byFashFJQH+PsfLCB0bUvWoKs11HniDrnJqyutDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"396c9c00429700f559e1d3a4c4030da930f9ee8d3117cc75feda46f1afd81389","last_reissued_at":"2026-07-04T17:09:53.735753Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:09:53.735753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0803.2840","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":"2026-07-04T17:09:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g5pZRCQgbkwm+jHmkYm7q32MiLQCzO5b0Rf6PDqxWg/Up7f062xhXiWKkfOCTDWTuIB1AVM5GoiuKtHglrZ/CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:33:09.790326Z"},"content_sha256":"f4b1d1b02c6e4ac7cf4e2779ff984bf234e171634c40350bdfee574a293de51a","schema_version":"1.0","event_id":"sha256:f4b1d1b02c6e4ac7cf4e2779ff984bf234e171634c40350bdfee574a293de51a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:HFWJYACCS4APKWPB2OSMIAYNVE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"IPHAS discoveries of young stars towards Cyg OB2 and its southern periphery","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Boris T. Gaensicke, Danny Steeghs, Eduardo L. Martin, Janet E. Drew, Jeremy Drake, Jorick S. Vink (Armagh Observatory), Nick J. Wright, Robert Greimel","submitted_at":"2008-03-19T16:41:03Z","abstract_excerpt":"We report on the discovery of over 50 strong Halpha emitting objects towards the large OB association Cyg OB2 and the HII region DR 15 on its southern periphery. This was achieved using the INT Photometric Halpha Survey of the Northern Galactic Plane (IPHAS), combined with follow-up spectroscopy using the MMT multi-object spectrometer HectoSpec. We present optical spectra, supplemented with optical r', i' and Halpha photometry from IPHAS, and near-infrared J, H, and K photometry from 2MASS. The position of the objects in the (J - H) versus (H - K) diagram strongly suggests most of them are you"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.2840","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0803.2840/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:09:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RKchZwQIQhVrW9TH88y/Uf84IN+znnA/vjzx6znNJwPzqhRfTgzaVvoKnygznBFvnZpFj98MSQgs62QMT7fwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:33:09.790921Z"},"content_sha256":"5220ba689499773134c111d21d1b44a6a821c6bae2ebadc6f4a489332f81c4b6","schema_version":"1.0","event_id":"sha256:5220ba689499773134c111d21d1b44a6a821c6bae2ebadc6f4a489332f81c4b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HFWJYACCS4APKWPB2OSMIAYNVE/bundle.json","state_url":"https://pith.science/pith/HFWJYACCS4APKWPB2OSMIAYNVE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HFWJYACCS4APKWPB2OSMIAYNVE/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":"2026-08-07T06:33:09Z","links":{"resolver":"https://pith.science/pith/HFWJYACCS4APKWPB2OSMIAYNVE","bundle":"https://pith.science/pith/HFWJYACCS4APKWPB2OSMIAYNVE/bundle.json","state":"https://pith.science/pith/HFWJYACCS4APKWPB2OSMIAYNVE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HFWJYACCS4APKWPB2OSMIAYNVE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:HFWJYACCS4APKWPB2OSMIAYNVE","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":"dc9bd3b61d85d9430217a0a885b39090584b1866a0e549b23e7a916a6ad07858","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-19T16:41:03Z","title_canon_sha256":"7ad90cc6deed54d482c5fb9d516edd72b8549e861e355f1a7e1a52eaeaede308"},"schema_version":"1.0","source":{"id":"0803.2840","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.2840","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"arxiv_version","alias_value":"0803.2840v1","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.2840","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"pith_short_12","alias_value":"HFWJYACCS4AP","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"pith_short_16","alias_value":"HFWJYACCS4APKWPB","created_at":"2026-07-04T17:09:53Z"},{"alias_kind":"pith_short_8","alias_value":"HFWJYACC","created_at":"2026-07-04T17:09:53Z"}],"graph_snapshots":[{"event_id":"sha256:5220ba689499773134c111d21d1b44a6a821c6bae2ebadc6f4a489332f81c4b6","target":"graph","created_at":"2026-07-04T17:09:53Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0803.2840/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on the discovery of over 50 strong Halpha emitting objects towards the large OB association Cyg OB2 and the HII region DR 15 on its southern periphery. This was achieved using the INT Photometric Halpha Survey of the Northern Galactic Plane (IPHAS), combined with follow-up spectroscopy using the MMT multi-object spectrometer HectoSpec. We present optical spectra, supplemented with optical r', i' and Halpha photometry from IPHAS, and near-infrared J, H, and K photometry from 2MASS. The position of the objects in the (J - H) versus (H - K) diagram strongly suggests most of them are you","authors_text":"Boris T. Gaensicke, Danny Steeghs, Eduardo L. Martin, Janet E. Drew, Jeremy Drake, Jorick S. Vink (Armagh Observatory), Nick J. Wright, Robert Greimel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-19T16:41:03Z","title":"IPHAS discoveries of young stars towards Cyg OB2 and its southern periphery"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.2840","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:f4b1d1b02c6e4ac7cf4e2779ff984bf234e171634c40350bdfee574a293de51a","target":"record","created_at":"2026-07-04T17:09:53Z","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":"dc9bd3b61d85d9430217a0a885b39090584b1866a0e549b23e7a916a6ad07858","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-19T16:41:03Z","title_canon_sha256":"7ad90cc6deed54d482c5fb9d516edd72b8549e861e355f1a7e1a52eaeaede308"},"schema_version":"1.0","source":{"id":"0803.2840","kind":"arxiv","version":1}},"canonical_sha256":"396c9c00429700f559e1d3a4c4030da930f9ee8d3117cc75feda46f1afd81389","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"396c9c00429700f559e1d3a4c4030da930f9ee8d3117cc75feda46f1afd81389","first_computed_at":"2026-07-04T17:09:53.735753Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:09:53.735753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8M5Hj142vj5xsuDlSX/y6FRnnOzwLOZyOWED08CY+dEhP6byFashFJQH+PsfLCB0bUvWoKs11HniDrnJqyutDA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:09:53.736117Z","signed_message":"canonical_sha256_bytes"},"source_id":"0803.2840","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f4b1d1b02c6e4ac7cf4e2779ff984bf234e171634c40350bdfee574a293de51a","sha256:5220ba689499773134c111d21d1b44a6a821c6bae2ebadc6f4a489332f81c4b6"],"state_sha256":"43a100d5a4232135c1171441306b9a53fe7492c96b627598bd4d87421f56ed4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kf1YkeTv3UkPWVuf5FrZu1cZhVWzFh70LYYiGcKIKyYCuZPWQI4xi5e5fhNDWf5eq81IneLJhWo2Uw5Bj933CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:33:09.794832Z","bundle_sha256":"2516793250ed7178264c5f3318c7a90e9cde0e4844f3b0e69f5a779cb3216eb5"}}