Pith Number

pith:OFPUPDVJ

pith:2018:OFPUPDVJYDRIWIN4NWGDBLIWW4

not attested not anchored not stored refs pending

Fundamental Limitations on the Calibration of Redundant 21 cm Cosmology Instruments and Implications for HERA and the SKA

Adam P. Beardsley, Bryna Hazelton, Cathryn Trott, Ian Sullivan, Jonathan Pober, Miguel F. Morales, Nichole Barry, Ronniy Joseph, Ruby Byrne, Wenyang Li

arxiv:1811.01378 v2 · 2018-11-04 · astro-ph.IM · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OFPUPDVJYDRIWIN4NWGDBLIWW4}

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	2026-05-17T23:47:59.262908Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

715f478ea9c0e28b21bc6d8c30ad16b7357247f732fc78445b0d524302664a50

Aliases

arxiv: 1811.01378 · arxiv_version: 1811.01378v2 · doi: 10.48550/arxiv.1811.01378 · pith_short_12: OFPUPDVJYDRI · pith_short_16: OFPUPDVJYDRIWIN4 · pith_short_8: OFPUPDVJ

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/OFPUPDVJYDRIWIN4NWGDBLIWW4 \
  | 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: 715f478ea9c0e28b21bc6d8c30ad16b7357247f732fc78445b0d524302664a50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98d4207fc8230b9dff5056efaee7c2f3c04cf4b230aa33cebea2a81ef05c79dc",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-11-04T14:30:40Z",
    "title_canon_sha256": "c3dd302e92263b1405234162d9114ab4d5ba535479321b1ef15e806309ff0ec5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.01378",
    "kind": "arxiv",
    "version": 2
  }
}