{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:GO6NFMCJYTSVTB36JAITSV4MKJ","short_pith_number":"pith:GO6NFMCJ","canonical_record":{"source":{"id":"1001.0027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-12-30T21:25:44Z","cross_cats_sorted":[],"title_canon_sha256":"f8525c42f01f82a278f70fc5220f22c2e3c6c4d33717428a2121f81177932054","abstract_canon_sha256":"e8e39856e21cc26a81431e3430270e9d621257e63bf8b0a21567ca4fdd97fa55"},"schema_version":"1.0"},"canonical_sha256":"33bcd2b049c4e559877e481139578c524066441e4c44dd4a49522d6d9bbdbc23","source":{"kind":"arxiv","id":"1001.0027","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.0027","created_at":"2026-05-18T02:10:06Z"},{"alias_kind":"arxiv_version","alias_value":"1001.0027v1","created_at":"2026-05-18T02:10:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.0027","created_at":"2026-05-18T02:10:06Z"},{"alias_kind":"pith_short_12","alias_value":"GO6NFMCJYTSV","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"GO6NFMCJYTSVTB36","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"GO6NFMCJ","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:GO6NFMCJYTSVTB36JAITSV4MKJ","target":"record","payload":{"canonical_record":{"source":{"id":"1001.0027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-12-30T21:25:44Z","cross_cats_sorted":[],"title_canon_sha256":"f8525c42f01f82a278f70fc5220f22c2e3c6c4d33717428a2121f81177932054","abstract_canon_sha256":"e8e39856e21cc26a81431e3430270e9d621257e63bf8b0a21567ca4fdd97fa55"},"schema_version":"1.0"},"canonical_sha256":"33bcd2b049c4e559877e481139578c524066441e4c44dd4a49522d6d9bbdbc23","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:06.210304Z","signature_b64":"tj6BUHXk+8T9AF1Z8MSuoX20I8VtpNTi80OP/Yrpwh16lZrGjv/RXoxagb8kTkUAvQ0BqNLbGivTWTr+/aM1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33bcd2b049c4e559877e481139578c524066441e4c44dd4a49522d6d9bbdbc23","last_reissued_at":"2026-05-18T02:10:06.207334Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:06.207334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.0027","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":"2026-05-18T02:10:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pd9K1TTpdp9bZbvk+MMfLRKxs7dvw9+uwJFudKSgEvTTz3xBVMPgS8OnFNkiYttJ2DMsYWxuiFJuffRb/8ijAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:26:07.901070Z"},"content_sha256":"fd7c80146cf9ed789825221410df0a4fc5a3a29a5f18b335ba90bc3f5c4f18f9","schema_version":"1.0","event_id":"sha256:fd7c80146cf9ed789825221410df0a4fc5a3a29a5f18b335ba90bc3f5c4f18f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:GO6NFMCJYTSVTB36JAITSV4MKJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New candidate Planetary Nebulae in the IPHAS survey: the case of PNe with ISM interaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Albert A. Zijlstra, Antonio Mampaso, Christopher Wareing, Kerttu Viironen, Laurence Sabin, Nicholas J. Wright, Quentin A. Parker, Romano L.M. Corradi","submitted_at":"2009-12-30T21:25:44Z","abstract_excerpt":"We present the results of the search for candidate Planetary Nebulae interacting with the interstellar medium (PN-ISM) in the framework of the INT Photometric H$\\alpha$ Survey (IPHAS) and located in the right ascension range 18h-20h. The detection capability of this new Northern survey, in terms of depth and imaging resolution, has allowed us to overcome the detection problem generally associated to the low surface brightness inherent to PNe-ISM. We discuss the detection of 21 IPHAS PN-ISM candidates. Thus, different stages of interaction were observed, implying various morphologies i.e. from "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.0027","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":"2026-05-18T02:10:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LI/CP5IDQ7Hx/EshoRBmHEKVv/9JRf87infz6y3M2r0hbl/scI2LJOung/F70r7lwrZxXN0C4KrBiy5vK41vAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:26:07.901444Z"},"content_sha256":"dcf5bbc6124eb22bbe56a3a2552562415c62b7bbacabf30fe51b0a5adc8ddc2f","schema_version":"1.0","event_id":"sha256:dcf5bbc6124eb22bbe56a3a2552562415c62b7bbacabf30fe51b0a5adc8ddc2f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GO6NFMCJYTSVTB36JAITSV4MKJ/bundle.json","state_url":"https://pith.science/pith/GO6NFMCJYTSVTB36JAITSV4MKJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GO6NFMCJYTSVTB36JAITSV4MKJ/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":"2026-05-27T15:26:07Z","links":{"resolver":"https://pith.science/pith/GO6NFMCJYTSVTB36JAITSV4MKJ","bundle":"https://pith.science/pith/GO6NFMCJYTSVTB36JAITSV4MKJ/bundle.json","state":"https://pith.science/pith/GO6NFMCJYTSVTB36JAITSV4MKJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GO6NFMCJYTSVTB36JAITSV4MKJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:GO6NFMCJYTSVTB36JAITSV4MKJ","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":"e8e39856e21cc26a81431e3430270e9d621257e63bf8b0a21567ca4fdd97fa55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-12-30T21:25:44Z","title_canon_sha256":"f8525c42f01f82a278f70fc5220f22c2e3c6c4d33717428a2121f81177932054"},"schema_version":"1.0","source":{"id":"1001.0027","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.0027","created_at":"2026-05-18T02:10:06Z"},{"alias_kind":"arxiv_version","alias_value":"1001.0027v1","created_at":"2026-05-18T02:10:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.0027","created_at":"2026-05-18T02:10:06Z"},{"alias_kind":"pith_short_12","alias_value":"GO6NFMCJYTSV","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"GO6NFMCJYTSVTB36","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"GO6NFMCJ","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:dcf5bbc6124eb22bbe56a3a2552562415c62b7bbacabf30fe51b0a5adc8ddc2f","target":"graph","created_at":"2026-05-18T02:10:06Z","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 results of the search for candidate Planetary Nebulae interacting with the interstellar medium (PN-ISM) in the framework of the INT Photometric H$\\alpha$ Survey (IPHAS) and located in the right ascension range 18h-20h. The detection capability of this new Northern survey, in terms of depth and imaging resolution, has allowed us to overcome the detection problem generally associated to the low surface brightness inherent to PNe-ISM. We discuss the detection of 21 IPHAS PN-ISM candidates. Thus, different stages of interaction were observed, implying various morphologies i.e. from ","authors_text":"Albert A. Zijlstra, Antonio Mampaso, Christopher Wareing, Kerttu Viironen, Laurence Sabin, Nicholas J. Wright, Quentin A. Parker, Romano L.M. Corradi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-12-30T21:25:44Z","title":"New candidate Planetary Nebulae in the IPHAS survey: the case of PNe with ISM interaction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.0027","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:fd7c80146cf9ed789825221410df0a4fc5a3a29a5f18b335ba90bc3f5c4f18f9","target":"record","created_at":"2026-05-18T02:10:06Z","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":"e8e39856e21cc26a81431e3430270e9d621257e63bf8b0a21567ca4fdd97fa55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-12-30T21:25:44Z","title_canon_sha256":"f8525c42f01f82a278f70fc5220f22c2e3c6c4d33717428a2121f81177932054"},"schema_version":"1.0","source":{"id":"1001.0027","kind":"arxiv","version":1}},"canonical_sha256":"33bcd2b049c4e559877e481139578c524066441e4c44dd4a49522d6d9bbdbc23","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33bcd2b049c4e559877e481139578c524066441e4c44dd4a49522d6d9bbdbc23","first_computed_at":"2026-05-18T02:10:06.207334Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:06.207334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tj6BUHXk+8T9AF1Z8MSuoX20I8VtpNTi80OP/Yrpwh16lZrGjv/RXoxagb8kTkUAvQ0BqNLbGivTWTr+/aM1AA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:06.210304Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.0027","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd7c80146cf9ed789825221410df0a4fc5a3a29a5f18b335ba90bc3f5c4f18f9","sha256:dcf5bbc6124eb22bbe56a3a2552562415c62b7bbacabf30fe51b0a5adc8ddc2f"],"state_sha256":"07fce571d459cb1b575fb6203ee69976c796292c240bffe4022aba637f991c3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pw2lSWjigZ2e3N4cUxvD57iou8mYBnwbEtN3pSGl+yqhGzqyvXPdqACmEouW02eDLB7533fKXA7fnfFj0cIwAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T15:26:07.904409Z","bundle_sha256":"732fea9ff35293f55d1c6e75cdf0d4599473283b57fbe34f69acdda454bb2289"}}