Pith Number

pith:KW5JC5TQ

pith:2019:KW5JC5TQNUK3UUVK34VV73WJYE

not attested not anchored not stored refs pending

An accurate low-redshift measurement of the cosmic neutral hydrogen density

Barbara Catinella, Claudia del P. Lagos, Katinka Gereb, Laura Hoppmann, Lister Staveley-Smith, Luca Cortese, Martin Meyer, Raffaella Morganti, Tom Oosterloo, Wenkai Hu

arxiv:1907.10375 v1 · 2019-07-24 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KW5JC5TQNUK3UUVK34VV73WJYE}

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.

Cited by

1 paper in Pith

Empirical estimates of how massive galaxies can be in {\Lambda}CDM

Receipt and verification

First computed	2026-05-17T23:39:38.129990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55ba9176706d15ba52aadf2b5feec9c1088c793e4ff4f25eece5f44f92576700

Aliases

arxiv: 1907.10375 · arxiv_version: 1907.10375v1 · doi: 10.48550/arxiv.1907.10375 · pith_short_12: KW5JC5TQNUK3 · pith_short_16: KW5JC5TQNUK3UUVK · pith_short_8: KW5JC5TQ

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/KW5JC5TQNUK3UUVK34VV73WJYE \
  | 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: 55ba9176706d15ba52aadf2b5feec9c1088c793e4ff4f25eece5f44f92576700

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "405e3d16f7547e6a7e70b2323be39e854e8cc4bd62558189195cc754f325538c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-07-24T11:53:14Z",
    "title_canon_sha256": "be6a81c20ef607a93e819d474245aaed1976eb3d30d0a92b76daae176d13fb17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.10375",
    "kind": "arxiv",
    "version": 1
  }
}