Pith Number

pith:553EEMLR

pith:2006:553EEMLRFKFE45MRMCWJ6N3N7M

not attested not anchored not stored refs pending

Accurate laboratory ultraviolet wavelengths for quasar absorption-line constraints on varying fundamental constants

(2) IoA, Cambridge), M. Aldenius (1), M. T. Murphy (2) ((1) Lund Observatory, S. Johansson (1)

arxiv:astro-ph/0605053 v1 · 2006-05-02 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{553EEMLRFKFE45MRMCWJ6N3N7M}

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	2026-07-04T16:58:40.153937Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef764231712a8a4e759160ac9f376dfb082d7b072a5f52cccaed5e07940bf015

Aliases

arxiv: astro-ph/0605053 · arxiv_version: astro-ph/0605053v1 · doi: 10.48550/arxiv.astro-ph/0605053 · pith_short_12: 553EEMLRFKFE · pith_short_16: 553EEMLRFKFE45MR · pith_short_8: 553EEMLR

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/553EEMLRFKFE45MRMCWJ6N3N7M \
  | 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: ef764231712a8a4e759160ac9f376dfb082d7b072a5f52cccaed5e07940bf015

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0aaee997d2068db2d64ce8a80b050ae7003eb320742896b2e8e054e701b536c4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-05-02T10:32:18Z",
    "title_canon_sha256": "de6023e8a1143c04766c50e678906e7e292fe3787d4828da4f9289be2ae21845"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0605053",
    "kind": "arxiv",
    "version": 1
  }
}