Pith Number

pith:7BCUPFYS

pith:2011:7BCUPFYS5CKZ4J5YK4TBBPGLPR

not attested not anchored not stored refs pending

An HI column density threshold for cold gas formation in the Galaxy

(2) CSIRO Astrophysics, (3) National Radio Astronomy Observatory, Australia, India, Nirupam Roy (3) ((1) National Centre for Radio Astrophysics, Nissim Kanekar (1), Robert Braun (2), Space Science, USA)

arxiv:1107.0744 v2 · 2011-07-04 · 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{7BCUPFYS5CKZ4J5YK4TBBPGLPR}

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	2026-05-18T03:33:14.381983Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f845479712e8959e27b8572610bccb7c7b86ec47529fa37a7440b05067a765fe

Aliases

arxiv: 1107.0744 · arxiv_version: 1107.0744v2 · doi: 10.48550/arxiv.1107.0744 · pith_short_12: 7BCUPFYS5CKZ · pith_short_16: 7BCUPFYS5CKZ4J5Y · pith_short_8: 7BCUPFYS

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/7BCUPFYS5CKZ4J5YK4TBBPGLPR \
  | 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: f845479712e8959e27b8572610bccb7c7b86ec47529fa37a7440b05067a765fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d228cdcb9de766bc34b4773e786f54fee7d08f02db5efdc7995c23ac0956392d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-07-04T21:01:14Z",
    "title_canon_sha256": "fbb6cfc84058306f9983e6ba323ea4ed84a6a9bfe90c5b7271d2712f5b2a13ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0744",
    "kind": "arxiv",
    "version": 2
  }
}