Pith Number

pith:QSRXL3VS

pith:2010:QSRXL3VSSWU6HZQZ2SQJXTCZWD

not attested not anchored not stored refs pending

The first spectral line surveys searching for signals from the Dark Ages

{\AA}. Hjalmarson, Aa. Sandqvist, C.M. Persson, G. Rydbeck, J.Y. Daniel, M. Olberg, M. Signore, P. Encrenaz, R. Maoli, U. Frisk

arxiv:1003.2935 v1 · 2010-03-15 · 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{QSRXL3VSSWU6HZQZ2SQJXTCZWD}

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	2026-05-18T02:08:33.805656Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84a375eeb295a9e3e619d4a09bcc59b0d43828f6e8b5bac6d3a5c2c2a4984630

Aliases

arxiv: 1003.2935 · arxiv_version: 1003.2935v1 · doi: 10.48550/arxiv.1003.2935 · pith_short_12: QSRXL3VSSWU6 · pith_short_16: QSRXL3VSSWU6HZQZ · pith_short_8: QSRXL3VS

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/QSRXL3VSSWU6HZQZ2SQJXTCZWD \
  | 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: 84a375eeb295a9e3e619d4a09bcc59b0d43828f6e8b5bac6d3a5c2c2a4984630

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f819adaff4a082e441fd6289d052726ba9e77422b71a6449a56a95effc0bb4b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-03-15T15:03:12Z",
    "title_canon_sha256": "4ab186d1eb16d7415ee2bd08689ba21acf620fef8400f1d4c463d3edef14f8d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.2935",
    "kind": "arxiv",
    "version": 1
  }
}