Pith Number

pith:ADZW7ETX

pith:2018:ADZW7ETXTMHMI3ZGCRTTMYPSZQ

not attested not anchored not stored refs pending

The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524

A. Comastri, B. Balmaverde, C. Norman, C. Vignali, E. Liuzzo, E. Sani, E. Vanzella, F. Calura, F. Vito, G. B. Caminha, G. Lanzuisi, G. Risaliti, G. Zamorani, I. Prandoni, K. Iwasawa, M. Brusa, M. Cappi, M. Chiaberge, M. Mignoli, M. Paolillo, N. Cappelluti, P. Rosati, P. Tozzi, R. Gilli, R. Nanni, T. Costa

arxiv:1802.05613 v1 · 2018-02-15 · 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{ADZW7ETXTMHMI3ZGCRTTMYPSZQ}

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	2026-05-18T00:11:38.173643Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

00f36f92779b0ec46f2614673661f2cc07e78d3a02f7fd59bd4597b14c7e5cf0

Aliases

arxiv: 1802.05613 · arxiv_version: 1802.05613v1 · doi: 10.48550/arxiv.1802.05613 · pith_short_12: ADZW7ETXTMHM · pith_short_16: ADZW7ETXTMHMI3ZG · pith_short_8: ADZW7ETX

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/ADZW7ETXTMHMI3ZGCRTTMYPSZQ \
  | 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: 00f36f92779b0ec46f2614673661f2cc07e78d3a02f7fd59bd4597b14c7e5cf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5af082fb48d9838ac7fcee4934a298492bc2cf1301f6f59233b61c6568c4077",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-02-15T15:21:44Z",
    "title_canon_sha256": "5aaedc35ad5333626dba52cc76555ad1ca62d6de4ae7b47619907827b66efc55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.05613",
    "kind": "arxiv",
    "version": 1
  }
}