Pith Number

pith:55Q5YA2Z

pith:2009:55Q5YA2ZUEKHTBGIJCOZKKVTTA

not attested not anchored not stored refs pending

Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements

Daniel Stern, Licia Verde, Marc Kamionkowski, Raul Jimenez, S. Adam Stanford

arxiv:0907.3149 v1 · 2009-07-18 · astro-ph.CO

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{55Q5YA2ZUEKHTBGIJCOZKKVTTA}

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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

10 papers in Pith

Cosmology in symmetric teleparallel gravity and its dynamical system

Cosmic Dynamics in Einstein-Cartan Theory: Analysing Hubble Tension through Curvature and Torsion field

Comparative Analysis of EMCEE, Gaussian Process, and Masked Autoregressive Flow in Constraining the Hubble Constant Using Cosmic Chronometers Dataset

The Hubble Tension and Early Dark Energy

EFT of Dark Energy with Cosmic Chronometers: Reconstructing Background EFT Functions

Receipt and verification

First computed	2026-05-18T02:12:56.045495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef61dc0359a1147984c8489d952ab398253ec35939fdeaac60b4e695d546f25e

Aliases

arxiv: 0907.3149 · arxiv_version: 0907.3149v1 · doi: 10.48550/arxiv.0907.3149 · pith_short_12: 55Q5YA2ZUEKH · pith_short_16: 55Q5YA2ZUEKHTBGI · pith_short_8: 55Q5YA2Z

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/55Q5YA2ZUEKHTBGIJCOZKKVTTA \
  | 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: ef61dc0359a1147984c8489d952ab398253ec35939fdeaac60b4e695d546f25e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c472bf1dcc436b905d1227d739d7b1d7aca10ee9371b0d9e14b5a1bae01f84e5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-18T16:00:52Z",
    "title_canon_sha256": "3e41361eb195764c209a715bf87e46f967d2674a73954d4fc0f784b694d1e7f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3149",
    "kind": "arxiv",
    "version": 1
  }
}