Pith Number

pith:WGQIIMWX

pith:2009:WGQIIMWX6AAV23UJ3XVTOXM4AZ

not attested not anchored not stored refs pending

Swift monitoring of Cygnus X-2: investigating the NUV-X-ray connection

E. M. Cackett, E. S. Rykoff (UCSB), J. M. Miller (U. Michigan)

arxiv:0909.3804 v2 · 2009-09-21 · 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{WGQIIMWX6AAV23UJ3XVTOXM4AZ}

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	2026-05-18T02:34:29.389056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1a08432d7f0015d6e89ddeb375d9c064dbc10228f5b02322a82dcc56c1c0361

Aliases

arxiv: 0909.3804 · arxiv_version: 0909.3804v2 · doi: 10.48550/arxiv.0909.3804 · pith_short_12: WGQIIMWX6AAV · pith_short_16: WGQIIMWX6AAV23UJ · pith_short_8: WGQIIMWX

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/WGQIIMWX6AAV23UJ3XVTOXM4AZ \
  | 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: b1a08432d7f0015d6e89ddeb375d9c064dbc10228f5b02322a82dcc56c1c0361

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcb4abf5e6d39f0992ead08e85438ab51a37bb614a9f909b6553f1e48556d6d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-09-21T15:36:19Z",
    "title_canon_sha256": "087c398c2c8b3fccba0d096e67a521e7df5cc1c78cb0f086e2f80ee7122e21c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3804",
    "kind": "arxiv",
    "version": 2
  }
}