FRB 121102

Image from Chatterjee et al., 2017, Nature, 541, 58

Summary
- Detected by: Arecibo
- FRB coordinates (RA, Dec): 05:31:58.70 +33:08:52.5 (J2000)
- Host coordinates (RA, Dec): 05:31:58.70 +33:08:52.7 (J2000)
- Redshift: 0.1927
- Observed DM: 557 ± 2 pc cm-3
- Repeating: Yes
- References: Spitler et al., 2016, Nature, 531, 202; Chatterjee et al., 2017, Nature, 541, 58; Tendulkar et al., 2017, ApJ, 834, 7; Bassa et al., 2017, ApJ, 843, 8; Heintz et al., 2020 (arXiv: 2009.10747)

Host galaxy properties

Quantity Measured value Unit
Stellar mass (0.14 ± 0.07) × 109 M
Star-formation rate 0.15 ± 0.04 M/yr
Metallicity < 8.08 12+log(O/H)
E(B-V) 0.12 ± 0.01 mag
Mass-weighted age 257.7 Myr
Absolute r-band mag. -16.20 ± 0.08 mag
u - r color (rest-frame) 1.49 ± 0.18 mag
Half-light radius 0.66 ± 0.03 kpc
FRB offset from galaxy center 0.57 ± 0.31 kpc
Gas-phase metallicities are derived using the O3N2 calibration from Hirschauer et al., 2018, AJ, 155, 82.

Emission line fluxes

Emission line Measured value
2.61 ± 0.04
0.96 ± 0.09
[OIII] λ 5007 4.38 ± 0.08
[NII] λ 6584 < 0.12
Measurements are reported in units of 10-16 erg s-1 cm-2 and are corrected for Galactic dust using the E(B−V) values derived from Schlafly & Finkbeiner, 2011, ApJ, 737, 103.

Photometry

Telescope Filter (eff. wavelength) Magnitude (AB)
GMOS-N g' (475 nm) 23.33 ± 0.12
GMOS-N r' (630 nm) 23.73 ± 0.14
GMOS-N i' (780 nm) 24.54 ± 0.09
GMOS-N z' (925 nm) 23.49 ± 0.13
Spitzer 3.6 (3.6 μm) 23.79 ± 0.20
Spitzer 4.5 (4.5 μm) > 24.7
HST/WFC3 F110W (1.1 μm) 23.08 ± 0.01
HST/WFC3 F160W (1.6 μm) 22.96 ± 0.03
Measurements are corrected for Galactic dust using the E(B−V) values derived from Schlafly & Finkbeiner, 2011, ApJ, 737, 103.