Pith Number

pith:YQRMBACO

pith:2012:YQRMBACOVIF4QC5GR37BBKYCKP

not attested not anchored not stored refs pending

Long-term X-ray variability of Swift J1644+57

Curtis J. Saxton, Kinwah Wu, N. Paul M. Kuin, Roberto Soria

arxiv:1201.5210 v2 · 2012-01-25 · astro-ph.HE · 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{YQRMBACOVIF4QC5GR37BBKYCKP}

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	2026-05-18T01:58:42.237912Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c422c0804eaa0bc80ba68efe10ab0253c9a72444a944fe37699c86c8478bb576

Aliases

arxiv: 1201.5210 · arxiv_version: 1201.5210v2 · doi: 10.48550/arxiv.1201.5210 · pith_short_12: YQRMBACOVIF4 · pith_short_16: YQRMBACOVIF4QC5G · pith_short_8: YQRMBACO

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/YQRMBACOVIF4QC5GR37BBKYCKP \
  | 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: c422c0804eaa0bc80ba68efe10ab0253c9a72444a944fe37699c86c8478bb576

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18c2831eb69349c302c02f6ba4a5abd35f3b0581f91898f4f65f78322622ca8a",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-01-25T09:15:27Z",
    "title_canon_sha256": "a50f8f4251ae80fbbc84b98090e33122335b306f08e6352b4b5f8e8f0f846c81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.5210",
    "kind": "arxiv",
    "version": 2
  }
}