Pith Number

pith:HF56EUF3

pith:2026:HF56EUF3CTDKWTZWLWMTHRHWRO

not attested not anchored not stored refs pending

Coloring Black Holes: Epistemic and Aesthetic Choices in Astronomical Imaging

Emilie Skulberg, Jeroen van Dongen, Rodrigo Ochigame

arxiv:2607.14928 v1 · 2026-07-16 · physics.hist-ph · astro-ph.HE · astro-ph.IM · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HF56EUF3CTDKWTZWLWMTHRHWRO}

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	2026-07-17T01:21:59.304331Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

397be250bb14c6ab4f365d9933c4f68bb49127d968d8d8ad8e7a0d5b97db3dcb

Aliases

arxiv: 2607.14928 · arxiv_version: 2607.14928v1 · doi: 10.48550/arxiv.2607.14928 · pith_short_12: HF56EUF3CTDK · pith_short_16: HF56EUF3CTDKWTZW · pith_short_8: HF56EUF3

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/HF56EUF3CTDKWTZWLWMTHRHWRO \
  | 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: 397be250bb14c6ab4f365d9933c4f68bb49127d968d8d8ad8e7a0d5b97db3dcb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa7ad8fecd2bcf7a01a6ba3a6b8b2b5be8dedfc9c200129cf8474a5c43433101",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "astro-ph.IM",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2026-07-16T12:43:45Z",
    "title_canon_sha256": "bf3a9f94a7276c165b1ab862d5bfabc260ba49b05e181b6c697456ebc3ad26f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.14928",
    "kind": "arxiv",
    "version": 1
  }
}