Pith Number

pith:BERR3BFG

pith:2019:BERR3BFGG6URLCVE37UYIBJA5I

not attested not anchored not stored refs pending

The hydroxyl satellite-line `flip' as a tracer of expanding HII regions

Anita Petzler, Joanne R Dawson, Mark Wardle

arxiv:1911.03856 v3 · 2019-11-10 · 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{BERR3BFGG6URLCVE37UYIBJA5I}

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	2026-07-05T01:26:06.773174Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09231d84a637a9158aa4dfe9840520ea2cf0fcd1e003dd27590efa63c2591bce

Aliases

arxiv: 1911.03856 · arxiv_version: 1911.03856v3 · doi: 10.48550/arxiv.1911.03856 · pith_short_12: BERR3BFGG6UR · pith_short_16: BERR3BFGG6URLCVE · pith_short_8: BERR3BFG

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/BERR3BFGG6URLCVE37UYIBJA5I \
  | 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: 09231d84a637a9158aa4dfe9840520ea2cf0fcd1e003dd27590efa63c2591bce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d19fbcdfce979c3a3584ce40f1f97fc27f3a6aae72bde46ee09de4c7a4b4c97",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-11-10T05:24:32Z",
    "title_canon_sha256": "f56a925a4f207bf8b6c0a618cd321f858a125de1fc1a1ecf69aa2d51914be886"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.03856",
    "kind": "arxiv",
    "version": 3
  }
}