LRD Watch DR1 · catalog object
LRDW J041730.25-114753.4
Images
3.2″ across, north up, east left, resampled from the deepest mosaic covering the object in each band; ticks mark the catalogue position. Each band is stretched on its own noise; the composite shares one flux scale, so its colour is real. No coverage in F200W, F356W.
Spectral energy distribution
- NIRCam wide
- NIRCam medium
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- TENTATIVE
- Found by
- BH* channel
- Redshift
- 5.621 DJA grade 3, PRISM
- Spectral shape
- inconclusive de Graaff+25 criteria
- F444W
- 27.28 AB S/N 35, 0.16″ aperture
- F277W − F444W
- not in the colour lane
- BH* share
- 0.80 bhs_bb4800_b4; Δχ² galaxy 0.2, dwarf 24.3
- Compactness
- growth ratio 2.356 stars 2.354
- Balmer break
- 1.29 (lower limit) F277W/F210M, blue:2sig-limit
- Image vetting
- half-stack pass; no flags raised
- Literature
- 1 catalogue(s), 0 AGN paper(s) within 0.041″
Vetting
- Image vettingnot applicable
- Half-stack testpass
- Artifact risknone
- Neighbournone
- Extendedno
- BH* channelevidence dchi2_gal=0.2 dchi2_bd=24.3
Redshifts
Each redshift keeps its own column. Photometric redshifts of little red dots are unreliable: against spectra, about a third of AGN-template redshifts (z_agn; 31 of 95 in the last purity run) and about half of galaxy-template redshifts at z > 3 were catastrophic outliers (methods Section 8).
| Column | What it is | z | Source |
|---|---|---|---|
z_spec | Spectroscopic, DJA grade 3 | 5.6213 | macs0417-v4_prism-clear_1208_205006.spec.fits |
z_vet | Adopted by vetting | 5.6213 | zspec:dja_specz_grade3.csv:205006 |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 5.714 | bhs_bb4800_b4 |
z_agn | Colour-lane fit | — | — |
Spectral checks
- V-shape (spectrum)
- inconclusive
- Star (spectrum)
- no
- V-shape (photometry)
- not measurable βUV not measured, βopt not measured at z_agn
- Line in F410M
- none 4 line-free optical band(s)
- Line-ambiguous
- no
- Settling verdict
- not evaluated
Literature
Published objects within 1″ of this position. A match is a positional recovery, not an adopted classification.
- de Graaff et al. (2025)
Photometry
Circular aperture of radius 0.16″ at each band's native resolution, background from a 0.40–0.65″ annulus, programmes combined by inverse variance. For a point source multiply by the field's aperture correction (r = 0.16″ → 0.70″). Grey rows are below S/N 2.
| Band | Instrument | Pivot (µm) | f (nJy) | σ (nJy) | AB mag | S/N | Ap. corr. |
|---|---|---|---|---|---|---|---|
| F090W | NIRCam wide | 0.902 | 3.90 | 2.75 | 29.92 | 1.4 | 1.41–1.43 |
| F115W | NIRCam wide | 1.154 | 0.36 | 2.93 | 32.52 | 0.1 | 1.39–1.41 |
| F140M | NIRCam medium | 1.405 | 4.12 | 6.04 | 29.86 | 0.7 | 1.40–1.41 |
| F150W | NIRCam wide | 1.501 | 4.33 | 2.20 | 29.81 | 2.0 | 1.40–1.40 |
| F162M | NIRCam medium | 1.627 | 17.54 | 6.53 | 28.29 | 2.7 | 1.37–1.38 |
| F182M | NIRCam medium | 1.845 | −0.54 | 2.88 | — | −0.2 | 1.40–1.42 |
| F210M | NIRCam medium | 2.095 | 2.06 | 3.73 | 30.62 | 0.6 | 1.42–1.42 |
| F250M | NIRCam medium | 2.504 | 5.01 | 3.64 | 29.65 | 1.4 | 1.47–1.48 |
| F277W | NIRCam wide | 2.762 | 9.62 | 1.08 | 28.94 | 8.9 | 1.51–1.52 |
| F300M | NIRCam medium | 2.990 | 11.07 | 2.62 | 28.79 | 4.2 | 1.52–1.53 |
| F335M | NIRCam medium | 3.362 | 26.92 | 1.72 | 27.82 | 15.6 | 1.55–1.55 |
| F360M | NIRCam medium | 3.624 | 17.07 | 1.65 | 28.32 | 10.3 | 1.57–1.58 |
| F410M | NIRCam medium | 4.082 | 27.35 | 1.66 | 27.81 | 16.5 | 1.60–1.60 |
| F444W | NIRCam wide | 4.404 | 44.61 | 1.28 | 27.28 | 34.8 | 1.61–1.64 |
Provenance
- Field
- MACS J0417.5-1154 (
macsj04175,mj04175x) - Programmes
01208, 06882behind every mosaic the field measured- Pipeline rows merged
- 2 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F090W | jw01208-o026_t003_nircam_clear-f090w_i2d.fits | 0.031″ | 0.89 |
| F115W | jw01208-o026_t003_nircam_clear-f115w_i2d.fits | 0.031″ | 0.78 |
| F150W | jw01208-o026_t003_nircam_clear-f150w_i2d.fits | 0.031″ | 0.88 |
| F277W | jw01208-o026_t003_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F410M | jw01208-o026_t003_nircam_clear-f410m_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01208-o026_t003_nircam_clear-f444w_i2d.fits | 0.063″ | 1.00 |
Cite
Anderson, Jordan (2026). LRD Watch DR1: little red dot candidates from an independent search of public JWST imaging (Version DR1) [Data set]. Cerin Amroth Research. Zenodo. https://doi.org/10.5281/zenodo.23062632 Object LRDW J041730.25-114753.4.
CC BY 4.0. Please also acknowledge the JWST programmes that took the data. LRD Watch DR1 is a vetted candidate catalogue, not a complete census: it has no selection function and cannot on its own give number densities. About the release.