Pith Number

pith:37NPH7DO

pith:2012:37NPH7DOB6D3QIFGNUXLYUKXYB

not attested not anchored not stored refs pending

Determining neutron star masses with weak microlensing

2) ((1) National Astronomical Observatories, China (2) Jodrell Bank Centre for Astrophysics, Chinese Academy of Sciences, Lanlan Tian (1), Shude Mao (1, The University of Manchester, UK)

arxiv:1209.2249 v1 · 2012-09-11 · astro-ph.GA · 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{37NPH7DOB6D3QIFGNUXLYUKXYB}

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	2026-05-18T01:54:30.680781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfdaf3fc6e0f87b820a66d2ebc5157c06be8323244aad338dcb012e483e5ef91

Aliases

arxiv: 1209.2249 · arxiv_version: 1209.2249v1 · doi: 10.48550/arxiv.1209.2249 · pith_short_12: 37NPH7DOB6D3 · pith_short_16: 37NPH7DOB6D3QIFG · pith_short_8: 37NPH7DO

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/37NPH7DOB6D3QIFGNUXLYUKXYB \
  | 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: dfdaf3fc6e0f87b820a66d2ebc5157c06be8323244aad338dcb012e483e5ef91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2d3cae0bbb8bc77841f7cb111fcaa10120bb7187ecea78d904a086da702eca8",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-09-11T07:55:05Z",
    "title_canon_sha256": "3a48a6a1aa4e51962a08b468acf75211d8deacb10f30866b39f8d835db886d11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.2249",
    "kind": "arxiv",
    "version": 1
  }
}