{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:6GC2WHDKU6T5R6TQR24BMJU5S3","short_pith_number":"pith:6GC2WHDK","canonical_record":{"source":{"id":"1805.01828","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-04T15:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"98d129ec6d9ca75ea9e5ded14019f21845f175bf587a23a8fe13675b8167020e","abstract_canon_sha256":"4c502d8c7ea84041e2b64f65d305cc517b2980e9b5a394db2f542761e012ddc3"},"schema_version":"1.0"},"canonical_sha256":"f185ab1c6aa7a7d8fa708eb816269d96ce041272fb3d18afa7f2339a6e6bd6f1","source":{"kind":"arxiv","id":"1805.01828","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01828","created_at":"2026-05-18T00:16:46Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01828v1","created_at":"2026-05-18T00:16:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01828","created_at":"2026-05-18T00:16:46Z"},{"alias_kind":"pith_short_12","alias_value":"6GC2WHDKU6T5","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6GC2WHDKU6T5R6TQ","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6GC2WHDK","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:6GC2WHDKU6T5R6TQR24BMJU5S3","target":"record","payload":{"canonical_record":{"source":{"id":"1805.01828","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-04T15:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"98d129ec6d9ca75ea9e5ded14019f21845f175bf587a23a8fe13675b8167020e","abstract_canon_sha256":"4c502d8c7ea84041e2b64f65d305cc517b2980e9b5a394db2f542761e012ddc3"},"schema_version":"1.0"},"canonical_sha256":"f185ab1c6aa7a7d8fa708eb816269d96ce041272fb3d18afa7f2339a6e6bd6f1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:46.549977Z","signature_b64":"q+k7B6n3SgxRBgXSS48MNE/0JLNFK4zqy52YpkreQzSUgD4OR46gQBPovWwdebZRxyTd8M2YwSZV/yVE8MFBBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f185ab1c6aa7a7d8fa708eb816269d96ce041272fb3d18afa7f2339a6e6bd6f1","last_reissued_at":"2026-05-18T00:16:46.549383Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:46.549383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.01828","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":"2026-05-18T00:16:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YihzSANN0DSG0dJlTOdKCs2RQdJjn1k4wLMuHltneyfN/XnmW/6sta373pW0hUEYRHPwV52bAp9U7EqPS/WBBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:10:46.242119Z"},"content_sha256":"fc4eb0925635db64575f93985b6d122cf7cfe477693e88537e6e0c1f144de43a","schema_version":"1.0","event_id":"sha256:fc4eb0925635db64575f93985b6d122cf7cfe477693e88537e6e0c1f144de43a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:6GC2WHDKU6T5R6TQR24BMJU5S3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Propiedades fotom\\'etricas de las galaxias enanas de bajo brillo superficial en la zona central del grupo Pegasus I","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Smith Castelli, C. Escudero, F. Faifer, N. Gonz\\'alez, S. A. Cellone","submitted_at":"2018-05-04T15:39:26Z","abstract_excerpt":"Here we show the preliminary results of a photometric study of low surface brightness objects with $\\mu_{g'}~\\gtrsim~25$~mag/arcsec$^2$. These objects are present in several fields obtained with GEMINI-GMOS, in the central region of the Pegasus I group. We found that their photometric characteristics are similar to the so-called dwarf spheroidal galaxies or to the ultra low surface brightness galaxies."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01828","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":"2026-05-18T00:16:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gq6SvUluBsIWUbXRlB54DIqKuNHR8u1U7y+S0N6/8sJhtSJ88jzi9Aa7PtFXWLS5IxyQ3tR6u+GS+v/zXWS0Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:10:46.242815Z"},"content_sha256":"94ec2ea6a15d8b60e72e9241b193f36fbd59ef552c789e2e3dc635cbfc2d07ec","schema_version":"1.0","event_id":"sha256:94ec2ea6a15d8b60e72e9241b193f36fbd59ef552c789e2e3dc635cbfc2d07ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6GC2WHDKU6T5R6TQR24BMJU5S3/bundle.json","state_url":"https://pith.science/pith/6GC2WHDKU6T5R6TQR24BMJU5S3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6GC2WHDKU6T5R6TQR24BMJU5S3/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":"2026-05-27T09:10:46Z","links":{"resolver":"https://pith.science/pith/6GC2WHDKU6T5R6TQR24BMJU5S3","bundle":"https://pith.science/pith/6GC2WHDKU6T5R6TQR24BMJU5S3/bundle.json","state":"https://pith.science/pith/6GC2WHDKU6T5R6TQR24BMJU5S3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6GC2WHDKU6T5R6TQR24BMJU5S3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6GC2WHDKU6T5R6TQR24BMJU5S3","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":"4c502d8c7ea84041e2b64f65d305cc517b2980e9b5a394db2f542761e012ddc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-04T15:39:26Z","title_canon_sha256":"98d129ec6d9ca75ea9e5ded14019f21845f175bf587a23a8fe13675b8167020e"},"schema_version":"1.0","source":{"id":"1805.01828","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01828","created_at":"2026-05-18T00:16:46Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01828v1","created_at":"2026-05-18T00:16:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01828","created_at":"2026-05-18T00:16:46Z"},{"alias_kind":"pith_short_12","alias_value":"6GC2WHDKU6T5","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6GC2WHDKU6T5R6TQ","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6GC2WHDK","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:94ec2ea6a15d8b60e72e9241b193f36fbd59ef552c789e2e3dc635cbfc2d07ec","target":"graph","created_at":"2026-05-18T00:16:46Z","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":"Here we show the preliminary results of a photometric study of low surface brightness objects with $\\mu_{g'}~\\gtrsim~25$~mag/arcsec$^2$. These objects are present in several fields obtained with GEMINI-GMOS, in the central region of the Pegasus I group. We found that their photometric characteristics are similar to the so-called dwarf spheroidal galaxies or to the ultra low surface brightness galaxies.","authors_text":"A. Smith Castelli, C. Escudero, F. Faifer, N. Gonz\\'alez, S. A. Cellone","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-04T15:39:26Z","title":"Propiedades fotom\\'etricas de las galaxias enanas de bajo brillo superficial en la zona central del grupo Pegasus I"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01828","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:fc4eb0925635db64575f93985b6d122cf7cfe477693e88537e6e0c1f144de43a","target":"record","created_at":"2026-05-18T00:16:46Z","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":"4c502d8c7ea84041e2b64f65d305cc517b2980e9b5a394db2f542761e012ddc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-04T15:39:26Z","title_canon_sha256":"98d129ec6d9ca75ea9e5ded14019f21845f175bf587a23a8fe13675b8167020e"},"schema_version":"1.0","source":{"id":"1805.01828","kind":"arxiv","version":1}},"canonical_sha256":"f185ab1c6aa7a7d8fa708eb816269d96ce041272fb3d18afa7f2339a6e6bd6f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f185ab1c6aa7a7d8fa708eb816269d96ce041272fb3d18afa7f2339a6e6bd6f1","first_computed_at":"2026-05-18T00:16:46.549383Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:46.549383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q+k7B6n3SgxRBgXSS48MNE/0JLNFK4zqy52YpkreQzSUgD4OR46gQBPovWwdebZRxyTd8M2YwSZV/yVE8MFBBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:46.549977Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.01828","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc4eb0925635db64575f93985b6d122cf7cfe477693e88537e6e0c1f144de43a","sha256:94ec2ea6a15d8b60e72e9241b193f36fbd59ef552c789e2e3dc635cbfc2d07ec"],"state_sha256":"318821460d1942dc6ed2939d1635232d037ae779e9535dfdd11b74f1b9cd6040"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q+1ubUzGqfXli+2dcRb4S2KYWPCqpS40xstsQqbYTfro50PJ4ueUEVrxc5VM3SMxHjvYsUQHNzNLhGg0xtN+Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T09:10:46.247150Z","bundle_sha256":"147a468477fb1a6b96e3eeef356223040adbcaed3a0709702ca99b7bf2bc30e7"}}