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Table 3

Spectroscopic (effective temperature, log10 g, LOS velocity) obtained with RVSPECFIT and photometric parameters (heliocentric distance) of the candidate BHB stars.

ID Observation time
Julian Date-UTC		 Teff
Prior
[K]		 Result
[K]		 log10(g) Vh
[kms-1]		 Class D⊙
[kpc]
candBHB1 2459145.820359 8423 ±562 8245 ±253 3.080 ±0.132 10 ±14 BHB 106 ±5
2459193.744190 8611 ±213 3.005 ±0.104 35 ±12
candBHB2 2459200.699201 8376 ±842 8611 ±219 3.229 ±0.108 35 ±11 BHB 123 ±7
candBHB3 2459177.726597 8140 ±594 7691 ±121 3.649 ±0.405 78 ±20 Straggler nan ±nan
candBHB4 2459193.787593 8361 ±1362 8361 ±238 2.947 ±0.104 -31 ±14 BHB 123 ±8
candBHB5 2459196.707963 8317 ±1447 7628 ±85 2.766 ±0.133 50 ±12 BHB 135 ±7
candBHB6 2459202.715949 8354 ±994 7957 ±110 3.284 ±0.403 54 ±17 BHB? 141 ±7
candBHB7 2459197.740104 8144 ±854 8341 ±221 3.091 ±0.109 39 ±12 BHB 116 ±6
candBHB8 2459225.660648 8002 ±429 7737 ±59 3.007 ±0.195 27 ±9 BHB 94 ±4
candBHB9 2459196.753993 8624 ±773 9068 ±278 3.340 ±0.129 122 ±9 BHB 90 ±4
candBHB10 2459192.777477 8192 ±463 7828 ±82 2.852 ±0.083 136 ±8 BHB 95 ±5
candBHB11 2459200.766829 8009 ±889 8975 ±240 3.255 ±0.128 31 ±9 BHB 92 ±5
candBHB12 2459199.732419 7729 ±1129 7843 ±92 2.973 ±0.112 37 ±12 BHB 128 ±6
candBHB13 2459176.742639 8119 ±401 8121 ±121 2.990 ±0.077 9 ±9 BHB 88 ±4
candBHB14 2459198.756331 8006 ±975 8553 ±206 3.267 ±0.136 71 ±12 BHB 148 ±8
candBHB15 2459192.730613 8030 ±655 8467 ±52 4.125 ±0.109 -48 ±8 Straggler nan ±nan
candBHB16 2459202.755405 8502 ±421 9007 ±256 3.216 ±0.134 43 ±12 BHB 96 ±5
candBHB17 2459201.713171 8817 ±440 8616 ±180 3.221 ±0.042 45 ±13 BHB 97 ±5
candBHB18 2459224.701400 8420 ±856 8158 ±98 3.200 ±0.089 87 ±8 BHB 97 ±5
candBHB19 2459203.723565 8072 ±676 8104 ±99 3.226 ±0.108 16 ±10 BHB 89 ±4
candBHB20 2459207.693669 7878 ±281 7760 ±83 5.089 ±0.216 57 ±31 Straggler nan ±nan
candBHB21 2459177.769769 8140 ±704 8350 ±159 3.063 ±0.091 68 ±9 BHB 90 ±4
candBHB22 2459199.792697 7821 ±627 7513 ±59 2.855 ±0.270 54 ±12 BHB 140 ±7
candBHB23 2459176.782975 8567 ±1097 8752 ±354 3.027 ±0.161 55 ±12 BHB 129 ±8
2459197.792465 10415 ±852 3.873 ±0.367 76 ±15
candBHB24 2459196.797465 9756 ±1409 8583 ±262 3.380 ±0.105 70 ±14 BHB 150 ±8
2459195.808785 8935 ±358 3.329 ±0.211 73 ±15
candBHB25 2459225.707431 8735 ±1372 10787 ±nan 6.456 ±nan 100 ±28 WD nan ±nan
2459198.799965 11118 ±2 6.465 ±0.002 124 ±29 nan ±nan

Notes. A small subset of the returned parameters was chosen because of the expected difficulty in obtaining reliable estimates of [Fe/H], [α/Fe], and v sin i from low-resolution optical spectra of hot stars with strong Balmer lines that blend some of the metallicity-sensitive lines (see also noted limitations of RVSPECFIT in Koposov et al. 2024). We report the heliocentric LOS velocities without any corrections based on the velocity standard stars.

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