Pith Number

pith:DFVRBCX5

pith:2016:DFVRBCX5CM2FHALVPKVTQWDJT4

not attested not anchored not stored refs pending

Using the Crab Nebula as a high precision calibrator for Cosmic Microwave Background polarimeters

Brian Keating, David Leon, Jonathan Kaufman

arxiv:1602.01153 v1 · 2016-02-02 · 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{DFVRBCX5CM2FHALVPKVTQWDJT4}

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	2026-05-18T01:13:09.437340Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

196b108afd13345381757aab3858699f2add70b7ac0f42a4bda006cb8ebd02ac

Aliases

arxiv: 1602.01153 · arxiv_version: 1602.01153v1 · doi: 10.48550/arxiv.1602.01153 · pith_short_12: DFVRBCX5CM2F · pith_short_16: DFVRBCX5CM2FHALV · pith_short_8: DFVRBCX5

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/DFVRBCX5CM2FHALVPKVTQWDJT4 \
  | 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: 196b108afd13345381757aab3858699f2add70b7ac0f42a4bda006cb8ebd02ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "999c5a513eec642deaa87ebdba568e8b8f241cd669058d228f2509cab3609ad5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-02-02T23:25:51Z",
    "title_canon_sha256": "8d2744215963fba3a5a082a5f5dcecdfa9aef1127b9d5fe389d4a05919651589"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.01153",
    "kind": "arxiv",
    "version": 1
  }
}