Pith Number

pith:EJNODK5A

pith:2009:EJNODK5AKDMKSWZCM2ZSHQGEYW

not attested not anchored not stored refs pending

On the mass of the neutron star in Cyg X-2

G. Israelian, J. Casares, J.I. Gonzalez Hernandez, R. Rebolo

arxiv:0910.4496 v1 · 2009-10-23 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJNODK5AKDMKSWZCM2ZSHQGEYW}

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	2026-05-18T02:11:12.205896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

225ae1aba050d8a95b2266b323c0c4c5b9664415ab9f41a3d21c522757e08a49

Aliases

arxiv: 0910.4496 · arxiv_version: 0910.4496v1 · doi: 10.48550/arxiv.0910.4496 · pith_short_12: EJNODK5AKDMK · pith_short_16: EJNODK5AKDMKSWZC · pith_short_8: EJNODK5A

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/EJNODK5AKDMKSWZCM2ZSHQGEYW \
  | 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: 225ae1aba050d8a95b2266b323c0c4c5b9664415ab9f41a3d21c522757e08a49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0768b13a902eafcbcf47b2aa450df4e250499e9b02dbe3cd370ca3fb500c4f4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-10-23T12:27:18Z",
    "title_canon_sha256": "ade2d7407bd137adf04ae21397b0c41776e6da627f15dd5ef3eb8beb91afca3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.4496",
    "kind": "arxiv",
    "version": 1
  }
}