Pith Number

pith:KTN5556D

pith:2006:KTN5556DMYMR6BIBARPRBDWRZY

not attested not anchored not stored refs pending

Most hard X-ray selected quasars in Chandra Deep Fields are obscured

A. Streblyanska, A. Zirm, C. Norman, G. Hasinger, G. Szokoly, J. X. Wang, L. Kewley, M. Nonino, P. Jiang, P. Rosati, P. Tozzi, R. Giacconi, R. Gilli, V. Mainieri, W. Zheng, Z. Y. Zheng

arxiv:astro-ph/0611251 v1 · 2006-11-08 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KTN5556DMYMR6BIBARPRBDWRZY}

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	2026-07-04T15:16:59.977328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54dbdef7c366191f0501045f108ed1ce2b369e19d36eb766ecfec361dcba403b

Aliases

arxiv: astro-ph/0611251 · arxiv_version: astro-ph/0611251v1 · doi: 10.48550/arxiv.astro-ph/0611251 · pith_short_12: KTN5556DMYMR · pith_short_16: KTN5556DMYMR6BIB · pith_short_8: KTN5556D

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/KTN5556DMYMR6BIBARPRBDWRZY \
  | 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: 54dbdef7c366191f0501045f108ed1ce2b369e19d36eb766ecfec361dcba403b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39ab7497172f367ba462e40b6a1f0917695917c9cad8f092cd7abb3d819508ef",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-11-08T07:51:38Z",
    "title_canon_sha256": "f393a2f788b191d2f888c1e1da14308f34938ef64ac18f78a95b97153c70015d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0611251",
    "kind": "arxiv",
    "version": 1
  }
}