Pith Number

pith:ZBRFEB3U

pith:2013:ZBRFEB3UBA6ZEUJRL7FN6XKWG5

not attested not anchored not stored refs pending

Studies of NGC 6720 with Calibrated HST WFC3 Emission-Line Filter Images--II:Physical Conditions

C. R. O'Dell, G. J. Ferland, Manuel Peimbert, W. J. Henney

arxiv:1301.6642 v1 · 2013-01-28 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZBRFEB3UBA6ZEUJRL7FN6XKWG5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:00:20.821627Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c862520774083d9251315fcadf5d5637446ed6b48bd8e639291bb39fc9d3ef5e

Aliases

arxiv: 1301.6642 · arxiv_version: 1301.6642v1 · doi: 10.48550/arxiv.1301.6642 · pith_short_12: ZBRFEB3UBA6Z · pith_short_16: ZBRFEB3UBA6ZEUJR · pith_short_8: ZBRFEB3U

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/ZBRFEB3UBA6ZEUJRL7FN6XKWG5 \
  | 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: c862520774083d9251315fcadf5d5637446ed6b48bd8e639291bb39fc9d3ef5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8c25fd1db42b36e07393fbee7ef2a42cdd7074386069c545e7de6ce9b005091",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-01-28T18:49:16Z",
    "title_canon_sha256": "db86e3c6f918e4ec0e765a58cfdf8c5bb2707adf96bafb19b22e7f59d0e87d07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.6642",
    "kind": "arxiv",
    "version": 1
  }
}