Pith Number

pith:3QN5C7WE

pith:2012:3QN5C7WEF7PKJLMYDVMHIOS357

not attested not anchored not stored refs pending

Formaldehyde Silhouettes Against the Cosmic Microwave Background: A Mass-Limited, Distance-Independent, Extinction-Free Tracer of Star Formation Across the Epoch of Galaxy Evolution

Benjamin Zeiger, Jeremy Darling

arxiv:1204.0145 v1 · 2012-03-31 · 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{3QN5C7WEF7PKJLMYDVMHIOS357}

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	2026-05-18T01:57:59.740023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc1bd17ec42fdea4ad981d58743a5befd27cb92ff645df5332c06ca3817a0046

Aliases

arxiv: 1204.0145 · arxiv_version: 1204.0145v1 · doi: 10.48550/arxiv.1204.0145 · pith_short_12: 3QN5C7WEF7PK · pith_short_16: 3QN5C7WEF7PKJLMY · pith_short_8: 3QN5C7WE

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/3QN5C7WEF7PKJLMYDVMHIOS357 \
  | 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: dc1bd17ec42fdea4ad981d58743a5befd27cb92ff645df5332c06ca3817a0046

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b36a5b12c1dc311d116f1c6561b2384ac5b16b5fb80032e17aec608f394209cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-03-31T22:52:13Z",
    "title_canon_sha256": "b96a586c3d3bafbe43d9cc24b374e55194e2f9b97b6a9d53fa2007315d8b205d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.0145",
    "kind": "arxiv",
    "version": 1
  }
}