Pith Number

pith:SD7ZFYIV

pith:2009:SD7ZFYIVYOPRBRLAOSO7I6NNBL

not attested not anchored not stored refs pending

Dissecting the Gravitational Lens B1608+656. II. Precision Measurements of the Hubble Constant, Spatial Curvature, and the Dark Energy Equation of State

C. D. Fassnacht, L. V. E. Koopmans, M. W. Auger, P. J. Marshall, R. D. Blandford, S. Hilbert, S. H. Suyu, T. Treu

arxiv:0910.2773 v2 · 2009-10-15 · astro-ph.CO

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.

Cited by

1 paper in Pith

Interacting $k$-essence field with non-pressureless Dark Matter: Cosmological Dynamics and Observational Constraints

Receipt and verification

First computed	2026-05-18T04:34:01.468193Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90ff92e115c39f10c560749df479ad0aee6e0a2abd3775cdc7422476efdad387

Aliases

arxiv: 0910.2773 · arxiv_version: 0910.2773v2 · doi: 10.48550/arxiv.0910.2773 · pith_short_12: SD7ZFYIVYOPR · pith_short_16: SD7ZFYIVYOPRBRLA · pith_short_8: SD7ZFYIV

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/SD7ZFYIVYOPRBRLAOSO7I6NNBL \
  | 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: 90ff92e115c39f10c560749df479ad0aee6e0a2abd3775cdc7422476efdad387

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14c99974d24ec4d846efb3cfdb89e4e16395fac3dfc746d8c3f92f2ef625c461",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-15T17:43:59Z",
    "title_canon_sha256": "6cac6e0ad63de9a58a4f4d316887ee0d7e1c1b53bb88e454683e36f650e33504"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2773",
    "kind": "arxiv",
    "version": 2
  }
}