Pith Number

pith:2ENXW5RE

pith:2021:2ENXW5REASD3QRAJHBAQZ32HSQ

not attested not anchored not stored refs pending

Chandra and Magellan/FIRE follow-up observations of PSO167-13: an X-ray weak QSO at $z=6.515$

Andrea Comastri, Bin Luo, Chiara Mazzucchelli, Cristian Vignali, Eduardo Ba\~nados, Enrico Congiu, Fabio Vito, Federica Ricci, Francesca Civano, Francesco Calura, Franz Erik Bauer, Gianni Zamorani, Marcella Brusa, Marco Mignoli, Nico Cappelluti, Ohad Shemmer, Riccardo Nanni, Roberto Decarli, Roberto Gilli, Simona Gallerani, Thomas Connor, William Nielsen Brandt

arxiv:2103.06901 v1 · 2021-03-11 · 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{2ENXW5REASD3QRAJHBAQZ32HSQ}

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	2026-07-05T02:45:25.017401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d11b7b76240487b8440938410cef47943bc18cebb754bfa98bacc7c07be6528b

Aliases

arxiv: 2103.06901 · arxiv_version: 2103.06901v1 · doi: 10.48550/arxiv.2103.06901 · pith_short_12: 2ENXW5REASD3 · pith_short_16: 2ENXW5REASD3QRAJ · pith_short_8: 2ENXW5RE

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/2ENXW5REASD3QRAJHBAQZ32HSQ \
  | 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: d11b7b76240487b8440938410cef47943bc18cebb754bfa98bacc7c07be6528b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5d589c4c4a63b8ee80b265b965b6c1c3e99f3a8c343db4bcd4d09a371f9719a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-03-11T19:00:23Z",
    "title_canon_sha256": "fd384e1d089a57f2b8a070cd03f891b1b276429d84cbe58de39c2c319f011ccf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.06901",
    "kind": "arxiv",
    "version": 1
  }
}