Pith Number

pith:GSDLSF4Y

pith:2009:GSDLSF4YB7QBMXF4PQE3NMSQC7

not attested not anchored not stored refs pending

Swift observations of the X-ray and UV evolution of V2491 Cyg (Nova Cyg 2008 No. 2)

(2) TAG, (3) Liverpool John Moores University, (4) XMM SOC, (5) INTEGRAL SOC, (6) West Chester University), A. Ibarra (4), A.P. Beardmore (1), E. Kuulkers (5), G.A. Wynn (2), G.J. Schwarz (6) ((1) XROA, J.P. Osborne (1), J.-U. Ness (4), K.L. Page (1), M.F. Bode (3), P.A. Evans (1), R.L.C. Starling (1), University of Leicester

arxiv:0909.1501 v1 · 2009-09-08 · astro-ph.HE

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

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	2026-05-18T02:11:58.475150Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3486b917980fe0165cbc7c09b6b25017f4debd2acc543bdd6ec50d0ce573c5b6

Aliases

arxiv: 0909.1501 · arxiv_version: 0909.1501v1 · doi: 10.48550/arxiv.0909.1501 · pith_short_12: GSDLSF4YB7QB · pith_short_16: GSDLSF4YB7QBMXF4 · pith_short_8: GSDLSF4Y

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/GSDLSF4YB7QBMXF4PQE3NMSQC7 \
  | 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: 3486b917980fe0165cbc7c09b6b25017f4debd2acc543bdd6ec50d0ce573c5b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1899be133f532580d1aebc72135f5f6b3ed2335c079c693d3e19bb64b54c96f2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-09-08T14:35:13Z",
    "title_canon_sha256": "ab0c236c3bba7f99d43be723086575c422ccb44e51b04dfb0d8876141aef9a1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1501",
    "kind": "arxiv",
    "version": 1
  }
}