LRD Watch DR1 · candidate
LRDW J142329.81+240943.6
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
- SILVER main class
- Found by
- colour lane
- Redshift
- 7.08 photometric
- Spectral shape
- no labelled spectrum
- F444W
- 26.98 AB S/N 49, 0.16″ aperture
- F277W − F444W
- 1.00 mag strict redness
- BH* share
- not in the BH* channel
- Compactness
- FWHM 0.198″
- Balmer break
- 1.29 ± 0.21 F335M/F250M, clean
- Image vetting
- half-stack pass; no flags raised
- Literature
- no published match within 1″
Vetting
- Image vettingpassed
- Half-stack testpass
- Artifact risknone
- Neighbournone
- Extendedno
- No vetting notes.
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 | — | — |
z_vet | Adopted by vetting | 7.0850 | pz:z_map (zpub 7.64 simbad.csv:CANUCS-4210883 [2024ApJ...966...74W] DISAGREES) |
z_phot | Photometric (P(z) peak) | 7.085 | 68%: 6.976–7.608 |
z_bhs | BH* channel fit | — | — |
z_agn | Colour-lane fit | 7.76 | AGN-inclusive templates |
Spectral checks
- V-shape (spectrum)
- no labelled spectrum
- Star (spectrum)
- no spectrum
- V-shape (photometry)
- passes βUV −2.72, βopt 2.08 at z_agn
- Line in F410M
- Hb, OIII 2 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.
- No published JWST little red dot or broad-line AGN within 1″.
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 | 1.37 | 2.01 | 31.06 | 0.7 | 1.28–1.32 |
| F115W | NIRCam wide | 1.154 | 20.25 | 2.13 | 28.13 | 9.5 | 1.26–1.34 |
| F140M | NIRCam medium | 1.405 | 30.61 | 4.22 | 27.68 | 7.2 | 1.25–1.29 |
| F150W | NIRCam wide | 1.501 | 25.86 | 1.92 | 27.87 | 13.5 | 1.26–1.34 |
| F162M | NIRCam medium | 1.627 | 17.78 | 3.79 | 28.27 | 4.7 | 1.25–1.33 |
| F182M | NIRCam medium | 1.845 | 22.69 | 2.31 | 28.01 | 9.8 | 1.27–1.34 |
| F210M | NIRCam medium | 2.095 | 21.34 | 2.51 | 28.08 | 8.5 | 1.31–1.40 |
| F250M | NIRCam medium | 2.504 | 22.53 | 3.51 | 28.02 | 6.4 | 1.37–1.43 |
| F277W | NIRCam wide | 2.762 | 23.28 | 1.02 | 27.98 | 22.9 | 1.40–1.48 |
| F300M | NIRCam medium | 2.990 | 26.29 | 2.12 | 27.85 | 12.4 | 1.41–1.47 |
| F335M | NIRCam medium | 3.362 | 29.13 | 1.56 | 27.74 | 18.6 | 1.44–1.53 |
| F360M | NIRCam medium | 3.624 | 26.53 | 1.58 | 27.84 | 16.8 | 1.46–1.53 |
| F410M | NIRCam medium | 4.082 | 49.14 | 1.73 | 27.17 | 28.4 | 1.51–1.57 |
| F444W | NIRCam wide | 4.404 | 58.50 | 1.18 | 26.98 | 49.4 | 1.52–1.61 |
Provenance
- Field
- MACS J1423.8+2404 (
macsj14238,macsj1423x) - Programmes
01208, 06882behind every mosaic the field measured- Pipeline rows merged
- 4 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F090W | jw01208-o032_t005_nircam_clear-f090w_i2d.fits | 0.031″ | 1.00 |
| F115W | jw01208-o032_t005_nircam_clear-f115w_i2d.fits | 0.031″ | 1.00 |
| F150W | jw01208-o032_t005_nircam_clear-f150w_i2d.fits | 0.031″ | 1.00 |
| F277W | jw01208-o032_t005_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F410M | jw01208-o032_t005_nircam_clear-f410m_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01208-o032_t005_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 J142329.81+240943.6.
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.