Pith Number

pith:MRSWWJYM

pith:2012:MRSWWJYM7WVX2JLOKWJHSL3AMO

not attested not anchored not stored refs pending

X-ray studies of the Black Widow Pulsar PSR B1957+20

A. K. H. Kong, C. Y. Hui, J. Takata, K. S. Cheng, L. C. C. Lin, R. H. H. Huang

arxiv:1209.5871 v1 · 2012-09-26 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MRSWWJYM7WVX2JLOKWJHSL3AMO}

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	2026-05-18T01:54:18.678289Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64656b270cfdab7d256e5592792f6063854a4d1ac40e0c4494cd233f75870293

Aliases

arxiv: 1209.5871 · arxiv_version: 1209.5871v1 · doi: 10.48550/arxiv.1209.5871 · pith_short_12: MRSWWJYM7WVX · pith_short_16: MRSWWJYM7WVX2JLO · pith_short_8: MRSWWJYM

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/MRSWWJYM7WVX2JLOKWJHSL3AMO \
  | 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: 64656b270cfdab7d256e5592792f6063854a4d1ac40e0c4494cd233f75870293

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a662ae2a32253f6007b9790f541c299daeef907235c793c8ea9ef209298155c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-09-26T08:42:46Z",
    "title_canon_sha256": "4eda1ae6b9dee9479bc8960e52d2846224ce2310c6171a79b259f3708b9b92f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.5871",
    "kind": "arxiv",
    "version": 1
  }
}