Pith Number

pith:2WS7DCDN

pith:2018:2WS7DCDNF5YYBT7MAU6B4GRJ5R

not attested not anchored not stored refs pending

An Intercomparison Study of Two Proximate Damped Ly$\alpha$ Systems with Residual Flux upon the Ly$\alpha$ Absorption Trough toward Quasars

Hongyan Zhou, Peng Jiang, Shaohua Zhang, Shengmiao Wu, Tuo Ji, Xiang Pan, Xiaoyi Xie, Xiheng Shi, Zhihao Zhong

arxiv:1804.10875 v1 · 2018-04-29 · astro-ph.GA · astro-ph.CO

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

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	2026-05-18T00:15:54.417948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5a5f1886d2f7180cfec053c1e1a29ec762781aaa64869c336ddc13b42b59fd6

Aliases

arxiv: 1804.10875 · arxiv_version: 1804.10875v1 · doi: 10.48550/arxiv.1804.10875 · pith_short_12: 2WS7DCDNF5YY · pith_short_16: 2WS7DCDNF5YYBT7M · pith_short_8: 2WS7DCDN

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/2WS7DCDNF5YYBT7MAU6B4GRJ5R \
  | 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: d5a5f1886d2f7180cfec053c1e1a29ec762781aaa64869c336ddc13b42b59fd6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "951f8cea83deda3c13cee4088c3789a1591388ddb3eb58f3b493949ac5907a05",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-29T05:10:15Z",
    "title_canon_sha256": "225aa7017ae44b3845654c4281757b7f80fd21b9d321948c7a9a5bd42ef4557c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10875",
    "kind": "arxiv",
    "version": 1
  }
}