Pith Number

pith:UCI4WXZM

pith:2021:UCI4WXZMSMBUP2ZKYDBH4LGW65

not attested not anchored not stored refs pending

VLBI images at 327 MHz of compact steep spectrum and GHz-peaked spectrum sources from the 3C and PW samples

((1) DIFA, 2), (2) INAF-IRA Bologna, C. Fanti (2), D. Dallacasa (1, Italy, Italy), M. Orienti (2), R. Fanti (2), University of Bologna

arxiv:2104.12804 v1 · 2021-04-26 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UCI4WXZMSMBUP2ZKYDBH4LGW65}

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	2026-07-05T02:39:19.667361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a091cb5f2c930347eb2ac0c27e2cd6f74d30f26c47093d13bfd6bb36fc1b2930

Aliases

arxiv: 2104.12804 · arxiv_version: 2104.12804v1 · doi: 10.48550/arxiv.2104.12804 · pith_short_12: UCI4WXZMSMBU · pith_short_16: UCI4WXZMSMBUP2ZK · pith_short_8: UCI4WXZM

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/UCI4WXZMSMBUP2ZKYDBH4LGW65 \
  | 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: a091cb5f2c930347eb2ac0c27e2cd6f74d30f26c47093d13bfd6bb36fc1b2930

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80007d9808a2b45a9c6bc0441b5a4d4bdbc31580c0db6902fd1931f3cf9a0c2d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-04-26T18:06:31Z",
    "title_canon_sha256": "7508d9cde662f9cdbc988da3bcadd977d79c17dcbc8a59d3e80d7d4cc1e23395"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.12804",
    "kind": "arxiv",
    "version": 1
  }
}