Pith Number

pith:KQL5DHEX

pith:2017:KQL5DHEXZCB7VWKGWNEKDD5LKL

not attested not anchored not stored refs pending

A Space-Based Observational Strategy for Characterizing the First Stars and Galaxies Using the Redshifted 21-cm Global Spectrum

Abhirup Datta, Abraham Loeb, Anastasia Fialkov, Bang Nhan, David Draper, David Newell, David Rapetti, Dayton Jones, Edward J. Wollack, Eric Switzer, Jack O. Burns, Jonathan Pritchard, Jordan Mirocha, Judd Bowman, Justin C. Kasper, Keith Tauscher, Michael Bicay, Raul Monsalve, Richard Bradley, Robert MacDowall, Steven Furlanetto, William Purcell

arxiv:1704.02651 v2 · 2017-04-09 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KQL5DHEXZCB7VWKGWNEKDD5LKL}

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	2026-05-18T00:39:35.960557Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5417d19c97c883fad946b348a18fab52de610f12736ef7d0b01d4b3cb4d34f5f

Aliases

arxiv: 1704.02651 · arxiv_version: 1704.02651v2 · doi: 10.48550/arxiv.1704.02651 · pith_short_12: KQL5DHEXZCB7 · pith_short_16: KQL5DHEXZCB7VWKG · pith_short_8: KQL5DHEX

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/KQL5DHEXZCB7VWKGWNEKDD5LKL \
  | 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: 5417d19c97c883fad946b348a18fab52de610f12736ef7d0b01d4b3cb4d34f5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a37c45dedb092d25b132565444a406ef77235b266d6faee3dea4f289bdf4d2b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2017-04-09T20:02:22Z",
    "title_canon_sha256": "01dcdb4edee1bfed383c12bae5499c2965b8b95fe90cf5d7eef2004975e95871"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.02651",
    "kind": "arxiv",
    "version": 2
  }
}