Pith Number

pith:JP7JOWY4

pith:2018:JP7JOWY4WD3K2FZJM6BIEM55UP

not attested not anchored not stored refs pending

The $^{87}$Rubidium Atomic Clock Maser in Giant Stars

Jeremy Darling

arxiv:1801.06937 v1 · 2018-01-22 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JP7JOWY4WD3K2FZJM6BIEM55UP}

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	2026-05-18T00:25:22.754213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4bfe975b1cb0f6ad172967828233bda3f79b798a3705c9636e95d106a1166ed4

Aliases

arxiv: 1801.06937 · arxiv_version: 1801.06937v1 · doi: 10.48550/arxiv.1801.06937 · pith_short_12: JP7JOWY4WD3K · pith_short_16: JP7JOWY4WD3K2FZJ · pith_short_8: JP7JOWY4

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/JP7JOWY4WD3K2FZJM6BIEM55UP \
  | 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: 4bfe975b1cb0f6ad172967828233bda3f79b798a3705c9636e95d106a1166ed4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a71d7f9382eefd33c4b0857f17ec4fbec0929f6372a8ffade714a08cfda9036f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-01-22T02:19:43Z",
    "title_canon_sha256": "be6b71cf04dee2f2b16d3569d94d5b7b9a7650fa36316cce1709bc671933ad91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.06937",
    "kind": "arxiv",
    "version": 1
  }
}