Pith Number

pith:Q4AH2MLC

pith:2018:Q4AH2MLCJU3IJAP7YBTQY54V7P

not attested not anchored not stored refs pending

Identifying quasars with astrometric and mid-infrared methods from APOP and ALLWISE

Beatrice Bucciarelli, Mario G. Lattanzi, Qing-Zeng Yan, Shilong Liao, Sufen Guo, Zhaoxiang Qi, Zhenghong Tang, Zihuang Cao

arxiv:1807.06177 v1 · 2018-07-17 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q4AH2MLCJU3IJAP7YBTQY54V7P}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:02:33.795273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87007d31624d368481ffc0670c7795fbf4217d9df7a18ac44de7c21c12bd7728

Aliases

arxiv: 1807.06177 · arxiv_version: 1807.06177v1 · doi: 10.48550/arxiv.1807.06177 · pith_short_12: Q4AH2MLCJU3I · pith_short_16: Q4AH2MLCJU3IJAP7 · pith_short_8: Q4AH2MLC

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/Q4AH2MLCJU3IJAP7YBTQY54V7P \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 87007d31624d368481ffc0670c7795fbf4217d9df7a18ac44de7c21c12bd7728

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17bf314eb69915ac09299be61db33f0e52eacb29e4ffe965f18adad4099cf4c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-17T01:54:29Z",
    "title_canon_sha256": "56524cbd01779f47ef9d048427fd762d7bdbb3e1ae2d01df39254bb2892fe0c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.06177",
    "kind": "arxiv",
    "version": 1
  }
}