Pith Number

pith:I2CEBQAE

pith:2019:I2CEBQAEMJHYXMN5DZQEKYLUB2

not attested not anchored not stored refs pending

A NICER Look at Strong X-ray Obscuration in the Seyfert-2 Galaxy NGC 4388

(2) NASA/GSFC, (3) Wayne State University, 4, (4) University of Rome, 5) ((1) University of Michigan, (5) University of Maryland), E. Cackett (3), E. Kammoun (1), F. Tombesi (2, J. M. Miller (1), K. Gendreau (2), R. M. Ludlam (1), Z. Arzoumanian (2)

arxiv:1908.08023 v1 · 2019-08-21 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I2CEBQAEMJHYXMN5DZQEKYLUB2}

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	2026-07-05T00:17:11.765169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

468440c004624f8bb1bd1e604561740ebfddd4fdd89ef81d93d5bae70f2ddfe5

Aliases

arxiv: 1908.08023 · arxiv_version: 1908.08023v1 · doi: 10.48550/arxiv.1908.08023 · pith_short_12: I2CEBQAEMJHY · pith_short_16: I2CEBQAEMJHYXMN5 · pith_short_8: I2CEBQAE

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/I2CEBQAEMJHYXMN5DZQEKYLUB2 \
  | 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: 468440c004624f8bb1bd1e604561740ebfddd4fdd89ef81d93d5bae70f2ddfe5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e927713c12d3c0d0e68f381d33e51bd6ea0064a7dcad170afe769a1ec53bc1c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-08-21T17:39:37Z",
    "title_canon_sha256": "fe8ed7c47769cbf36300a606f8688feb2846dd6e1064ac4d5a6ceb13e82c7ac2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08023",
    "kind": "arxiv",
    "version": 1
  }
}