Pith Number

pith:HT6ZGUBN

pith:2020:HT6ZGUBNM5HREIKN5DDMZNRY45

not attested not anchored not stored refs pending

X-ray, UV and optical time delays in the bright Seyfert galaxy Ark 120 with co-ordinated Swift and ground-based observations

A. Markowitz, A. P. Lobban, B. Debski, D. B. Caton, D. Carosati, D. E. Reichart, D. Porquet, E. Nardini, F. Pozo Nunez, G. Bhatta, G. Damljanovic, J. B. Haislip, J. Krzesinski, J. Reeves, R. Bachev, S. M. Hu, S. Zola, U. Pajdosz-Smierciak, V. Braito, V. Kouprianov

arxiv:2002.12348 v1 · 2020-02-27 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HT6ZGUBNM5HREIKN5DDMZNRY45}

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	2026-07-05T00:47:02.389663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3cfd93502d674f12214de8c6ccb638e758bafa951594e2afa2a9252c6fe6309c

Aliases

arxiv: 2002.12348 · arxiv_version: 2002.12348v1 · doi: 10.48550/arxiv.2002.12348 · pith_short_12: HT6ZGUBNM5HR · pith_short_16: HT6ZGUBNM5HREIKN · pith_short_8: HT6ZGUBN

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/HT6ZGUBNM5HREIKN5DDMZNRY45 \
  | 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: 3cfd93502d674f12214de8c6ccb638e758bafa951594e2afa2a9252c6fe6309c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f265ebaded5fdeb948f72e7faec9826be1244c4d1beb2ac3e4f960ad20875ad2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-02-27T18:59:54Z",
    "title_canon_sha256": "1fe219859919d5501999e239ef55a25fb3d49f5f418aec387af42136db6be504"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.12348",
    "kind": "arxiv",
    "version": 1
  }
}