Pith Number

pith:MQFT7VBD

pith:2018:MQFT7VBDRDYQURIU7SDJCWVRQZ

not attested not anchored not stored refs pending

Spectroscopic characterization of the protocluster of galaxies around 7C 1756+6520 at z ~ 1.4

(2) LERMA, (3) ESO Santiago, (4) Instituto de Radioastronomia y Astrofisica, (5) Uni. Padova, (6) INAF - Osservatorio Astronomico di Padova, (7) INAF - Istituto di Radioastronomia, Bologna, B. Poggianti (6), Chile, CNRS, College de France, E. Liuzzo (7) ((1) INAF - Osservatorio Astrofisico di Arcetri, E. Sani (3), F. Combes (2), France, G. Rodighiero (5), Italy, Italy), J. Fritz (4), L. Magrini (1), Mexico, Morelia, Obs. Paris, Paris, PSL Univ., S. Bianchi (1), Sorbonne Univ., UNAM, V. Casasola (1)

arxiv:1806.09493 v2 · 2018-06-25 · 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{MQFT7VBDRDYQURIU7SDJCWVRQZ}

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	2026-05-18T00:01:58.915662Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

640b3fd42388f10a4514fc86915ab18678ec821c32235acd75e5a6f93df3f73c

Aliases

arxiv: 1806.09493 · arxiv_version: 1806.09493v2 · doi: 10.48550/arxiv.1806.09493 · pith_short_12: MQFT7VBDRDYQ · pith_short_16: MQFT7VBDRDYQURIU · pith_short_8: MQFT7VBD

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/MQFT7VBDRDYQURIU7SDJCWVRQZ \
  | 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: 640b3fd42388f10a4514fc86915ab18678ec821c32235acd75e5a6f93df3f73c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36d016c4709b5fc2741eb8bd81503d18004582547bef7d6385e65e98f5adb537",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-06-25T14:39:37Z",
    "title_canon_sha256": "2146f7f227272cd49170c92cfdf01eed0d191caaa1123f0301fb1f2cfb24fdbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.09493",
    "kind": "arxiv",
    "version": 2
  }
}