Pith Number

pith:6KYM56UG

pith:2012:6KYM56UG4QG6ZHL2URHPOSSCVA

not attested not anchored not stored refs pending

The XMM deep survey in the CDF-S II. a 9-20 keV selection of heavily obscured active galaxies at z>1.7

A. Comastri, C. Vignali, F. J. Carrera, F. Vito, I. Georgantopoulos, K. Iwasawa, M. Paolillo, N. Cappelluti, P. Ranalli, R. Gilli, S. Falocco, V. Mainieri, W. N. Brandt

arxiv:1209.0916 v1 · 2012-09-05 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6KYM56UG4QG6ZHL2URHPOSSCVA}

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	2026-05-18T01:54:40.298859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2b0cefa86e40dec9d7aa44ef74a42a8232a5e2fe898c5f0abb3320a3a28398a

Aliases

arxiv: 1209.0916 · arxiv_version: 1209.0916v1 · doi: 10.48550/arxiv.1209.0916 · pith_short_12: 6KYM56UG4QG6 · pith_short_16: 6KYM56UG4QG6ZHL2 · pith_short_8: 6KYM56UG

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/6KYM56UG4QG6ZHL2URHPOSSCVA \
  | 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: f2b0cefa86e40dec9d7aa44ef74a42a8232a5e2fe898c5f0abb3320a3a28398a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d0c1e041b4f8f904b48c290d061a430c69897abed596b2fba1c517a3a02ad90",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-05T10:21:29Z",
    "title_canon_sha256": "635b75ea2364602120b29e7475b7c50eb1b8c2aaf6db6a6a0eeb46c2f509fde8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.0916",
    "kind": "arxiv",
    "version": 1
  }
}