Pith Number

pith:U2HGUR3M

pith:2009:U2HGUR3MNDRB5DQZQYSNHFKCGG

not attested not anchored not stored refs pending

GX 9+9: Variability of the X-Ray Orbital Modulation

Alan M. Levine, Albert K. H. Kong, Martin Durant, Phil Charles, Robert J. Harris, Tariq Shahbaz

arxiv:0902.4632 v1 · 2009-02-26 · 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{U2HGUR3MNDRB5DQZQYSNHFKCGG}

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	2026-05-18T04:29:16.246238Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a68e6a476c68e21e8e198624d39542319b6a290591cabcc6f08d162cb9bed9e0

Aliases

arxiv: 0902.4632 · arxiv_version: 0902.4632v1 · doi: 10.48550/arxiv.0902.4632 · pith_short_12: U2HGUR3MNDRB · pith_short_16: U2HGUR3MNDRB5DQZ · pith_short_8: U2HGUR3M

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/U2HGUR3MNDRB5DQZQYSNHFKCGG \
  | 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: a68e6a476c68e21e8e198624d39542319b6a290591cabcc6f08d162cb9bed9e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9c18ac0307115504d119ec2bd9fabf624a67be8630103b052916275e28b1e73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-02-26T20:42:45Z",
    "title_canon_sha256": "5c566e49e23083f5aaf8c1afb0de90243603f8b5fa8d0bb25ac9dbcb4d581308"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4632",
    "kind": "arxiv",
    "version": 1
  }
}