Presumed name: Swift J1753.7-2544
| BAT | 17h 53m 39.12s, -25° 45′ 43.2″ |
|---|---|
| position: | (268.413, -25.762 ± 180″) |
| XRT | No position available. |
| UVOT | No position available. |
| Galactic NHI: | 1.24×1022 cm-2 |
| Galactic E(B-V): | NED unavailable |
| Best RA: | 17h 53m 39.12s | = 268.413 d |
|---|---|---|
| Best Dec: | -25° 45′ 43.2″ | = -25.762 d |
| Gal Lat: | 0.1 | |
| Gal Long: | 3.64 | |
| Sun angle: | 39.81°, 2.8 hr West | |
| RA* | Dec* | Redshift | Catalogue | Query | ||
|---|---|---|---|---|---|---|
| 20.1 | 268.4192 | -25.7617 | B1=19.4, B2=17.2, I=13.6, R1=14.2, R2=14.6 | USNO-B1 | ![]() | |
| 26.1 | 268.4101 | -25.7552 | B2=20.7, R1=17.4 | USNO-B1 | ![]() | |
| 38.9 | 268.4029 | -25.7678 | B2=20.1, I=16.9, R2=18.4 | USNO-B1 | ![]() | |
| 44.8 | 268.4116 | -25.7496 | B2=18.4, I=17.3, R1=16.7, R2=17.4 | USNO-B1 | ![]() | |
| 47.4 | 268.4042 | -25.7515 | I=17.0, R2=18.4 | USNO-B1 | ![]() | |
| 48.7 | 268.3990 | -25.7670 | I=17.1, R1=17.3 | USNO-B1 | ![]() | |
| 58.1 | 268.4225 | -25.7757 | B1=17.4, B2=16.6, I=15.5, R1=14.8, R2=15.9 | USNO-B1 | ![]() | |
| 64.7 | 268.4309 | -25.7540 | B2=18.7, I=14.5, R1=15.5, R2=16.4 | USNO-B1 | ![]() | |
| 66.5 | 268.4329 | -25.7574 | B2=20.9, R1=17.8 | USNO-B1 | ![]() | |
| 66.7 | 268.3989 | -25.7755 | R1=17.3, R2=19.8 | USNO-B1 | ![]() | |
| 66.9 | 268.4244 | -25.7465 | B2=19.3, I=16.3, R1=16.7, R2=18.0 | USNO-B1 | ![]() | |
| 76.1 | 268.3898 | -25.7588 | B2=20.1, I=17.7, R1=17.8, R2=19.0 | USNO-B1 | ![]() | |
| 76.5 | 268.3902 | -25.7565 | I=15.2, R1=14.9, R2=15.8 | USNO-B1 | ![]() | |
| 79.1 | 268.4300 | -25.7462 | B2=21.1, I=18.1, R1=17.3 | USNO-B1 | ![]() | |
| 79.3 | 268.3886 | -25.7629 | B2=19.1, I=17.6, R1=16.9, R2=18.1 | USNO-B1 | ![]() | |
| 79.7 | 268.4106 | -25.7400 | B2=18.7, R1=11.1 | USNO-B1 | ![]() | |
| 81.1 | 268.4378 | -25.7653 | I=17.5, R1=17.4, R2=19.1 | USNO-B1 | ![]() | |
| 81.5 | 268.4347 | -25.7734 | I=16.4, R2=18.8 | USNO-B1 | ![]() | |
| 83.2 | 268.3873 | -25.7627 | B2=20.4, R2=18.6 | USNO-B1 | ![]() | |
| 85.0 | 268.3900 | -25.7733 | B2=20.6, I=17.8, R1=17.4 | USNO-B1 | ![]() | |
| 86.5 | 268.3871 | -25.7675 | I=16.5, R2=18.5 | USNO-B1 | ![]() | |
| 86.5 | 268.4397 | -25.7621 | B1=19.7, B2=18.1 | USNO-B1 | ![]() | |
| 86.7 | 268.4168 | -25.7382 | B1=17.2, B2=15.9, I=15.2, R1=14.7, R2=15.5 | USNO-B1 | ![]() | |
| 89.7 | 268.4399 | -25.7563 | B1=16.2, B2=15.6, I=14.7, R1=14.3, R2=15.0 | USNO-B1 | ![]() | |
| 92.4 | 268.4259 | -25.7391 | I=16.7, R1=16.5, R2=19.5 | USNO-B1 | ![]() | |
| 93.0 | 268.3948 | -25.7820 | B2=21.1, I=17.7, R1=17.3 | USNO-B1 | ![]() | |
| 96.4 | 268.3845 | -25.7697 | B1=19.7, B2=17.9, I=16.3, R1=15.4, R2=16.5 | USNO-B1 | ![]() | |
| 98.3 | 268.3884 | -25.7461 | B1=19.7, B2=18.5, R1=16.2, R2=17.4 | USNO-B1 | ![]() | |
| 99.3 | 268.4344 | -25.7422 | B2=20.0, I=16.1, R1=17.1, R2=18.5 | USNO-B1 | ![]() | |
| 99.5 | 268.4140 | -25.7896 | B1=19.3, B2=18.0, I=16.4, R1=15.8, R2=17.0 | USNO-B1 | ![]() | |
| 99.8 | 268.3822 | -25.7632 | B1=16.7, B2=16.2, I=14.6, R1=14.7, R2=15.2 | USNO-B1 | ![]() | |
| 101.1 | 268.4051 | -25.7349 | B1=19.8, I=14.4 | USNO-B1 | ![]() | |
| 103.5 | 268.4162 | -25.7334 | B1=14.0, B2=12.9, I=12.5, R1=12.1, R2=12.4 | USNO-B1 | ![]() | |
| 103.7 | 268.4185 | -25.7336 | B1=18.6, I=13.3 | USNO-B1 | ![]() | |
| 104.7 | 268.4106 | -25.7910 | B2=19.6, I=17.4 | USNO-B1 | ![]() | |
| 105.2 | 268.4107 | -25.7912 | B2=20.2, I=17.3 | USNO-B1 | ![]() | |
| 106.5 | 268.4457 | -25.7646 | I=18.0, R2=18.9 | USNO-B1 | ![]() | |
| 107.0 | 268.4032 | -25.7904 | I=17.2, R1=17.4, R2=11.2 | USNO-B1 | ![]() | |
| 107.4 | 268.3821 | -25.7728 | R1=16.4, R2=16.8 | USNO-B1 | ![]() | |
| 107.5 | 268.4217 | -25.7908 | I=16.7, R1=15.6, R2=18.8 | USNO-B1 | ![]() | |
| 109.7 | 268.3826 | -25.7755 | B2=15.1, R1=14.5 | USNO-B1 | ![]() | |
| 110.3 | 268.4446 | -25.7506 | B2=19.0, I=15.5, R1=16.2, R2=16.6 | USNO-B1 | ![]() | |
| 114.4 | 268.4249 | -25.7919 | I=15.4, R1=16.7, R2=18.1 | USNO-B1 | ![]() | |
| 115.1 | 268.4461 | -25.7736 | B=18.6, R2=17.8, i=17.3 | SSS | ![]() | |
| 116.2 | 268.4465 | -25.7736 | B1=17.8, R2=15.3 | USNO-B1 | ![]() | |
| 116.5 | 268.4159 | -25.7297 | B2=19.1, I=16.8, R1=17.1, R2=18.0 | USNO-B1 | ![]() | |
| 117.5 | 268.3923 | -25.7888 | B1=20.1, B2=17.9, I=15.3, R1=15.3, R2=16.2 | USNO-B1 | ![]() | |
| 118.2 | 268.4472 | -25.7735 | B1=20.3, I=14.1 | USNO-B1 | ![]() | |
| 118.6 | 268.4259 | -25.7928 | B2=18.4, I=15.0, R1=16.4, R2=15.8 | USNO-B1 | ![]() | |
| 119.9 | 268.3829 | -25.7814 | B1=18.6, B2=16.8, I=13.8, R2=14.9 | USNO-B1 | ![]() | |
| 120.3 | 268.4265 | -25.7931 | B2=18.4, I=14.9, R1=16.1, R2=16.6 | USNO-B1 | ![]() | |
| 120.3 | 268.4264 | -25.7932 | B=19.4, R2=18.0, i=16.4 | SSS | ![]() | |
| 120.6 | 268.4032 | -25.7943 | B2=17.0, I=14.8, R1=15.2, R2=16.0 | USNO-B1 | ![]() | |
| 122.0 | 268.4491 | -25.7524 | I=15.8, R1=17.3 | USNO-B1 | ![]() | |
| 123.2 | 268.3888 | -25.7884 | B1=16.8, I=14.6 | USNO-B1 | ![]() | |
| 124.0 | 268.3917 | -25.7334 | B1=16.1, B2=15.4, I=17.3, R1=14.0, R2=14.3 | USNO-B1 | ![]() | |
| 126.3 | 268.4436 | -25.7838 | B1=16.8, B2=16.1, I=14.2, R1=14.2, R2=15.0 | USNO-B1 | ![]() | |
| 126.6 | 268.3819 | -25.7833 | B1=16.6, B2=15.9, I=13.7, R1=13.3 | USNO-B1 | ![]() | |
| 127.3 | 268.4043 | -25.7275 | B1=19.0, I=17.2, R2=18.6 | USNO-B1 | ![]() | |
| 128.2 | 268.4456 | -25.7822 | B2=18.8, I=17.1, R1=16.6, R2=18.3 | USNO-B1 | ![]() | |
| 128.7 | 268.4479 | -25.7450 | B=20.2, R2=19.0, i=17.6 | SSS | ![]() | |
| 131.9 | 268.4502 | -25.7769 | B1=20.0, B2=19.3, I=16.2, R1=16.2, R2=17.8 | USNO-B1 | ![]() | |
| 132.5 | 268.4403 | -25.7894 | B2=20.7, I=16.8, R1=16.9, R2=18.1 | USNO-B1 | ![]() | |
| 134.0 | 268.3742 | -25.7492 | B1=19.6, B2=18.4, I=16.3, R1=16.2, R2=17.0 | USNO-B1 | ![]() | |
| 134.3 | 268.4039 | -25.7256 | B1=15.1, B2=14.3, I=13.6, R1=13.3, R2=13.5 | USNO-B1 | ![]() | |
| 134.5 | 268.3857 | -25.7339 | B1=19.2, B2=17.5, I=14.9, R1=15.2, R2=15.9 | USNO-B1 | ![]() | |
| 135.6 | 268.3892 | -25.7930 | B2=18.3, I=15.6, R1=15.7, R2=16.6 | USNO-B1 | ![]() | |
| 136.8 | 268.4155 | -25.7999 | I=17.9, R1=17.5 | USNO-B1 | ![]() | |
| 136.9 | 268.3972 | -25.7972 | B1=16.8, B2=16.2, I=14.7, R1=14.6, R2=15.2 | USNO-B1 | ![]() | |
| 137.2 | 268.4177 | -25.7241 | B2=19.2, I=16.9 | USNO-B1 | ![]() | |
| 138.8 | 268.4484 | -25.7403 | B1=18.9, B2=17.9, I=16.1, R1=15.9, R2=16.6 | USNO-B1 | ![]() | |
| 138.9 | 268.3778 | -25.7840 | B2=21.2, R2=19.3 | USNO-B1 | ![]() | |
| 140.0 | 268.4287 | -25.7982 | B2=19.2, I=16.9, R1=16.6, R2=18.4 | USNO-B1 | ![]() | |
| 140.8 | 268.3879 | -25.7301 | B1=16.8, B2=16.2, I=14.6, R1=14.6, R2=15.0 | USNO-B1 | ![]() | |
| 143.7 | 268.4375 | -25.7953 | B2=20.0, I=18.0, R1=17.1 | USNO-B1 | ![]() | |
| 144.7 | 268.4148 | -25.7218 | B2=18.1, I=16.9, R1=15.7 | USNO-B1 | ![]() | |
| 147.5 | 268.3758 | -25.7384 | I=16.1, R1=16.8, R2=18.2 | USNO-B1 | ![]() | |
| 148.2 | 268.3676 | -25.7569 | B1=17.6, B2=16.3, I=14.8, R1=14.1, R2=14.9 | USNO-B1 | ![]() | |
| 149.6 | 268.4422 | -25.7942 | I=17.2, R1=16.7, R2=18.8 | USNO-B1 | ![]() | |
| 151.7 | 268.3778 | -25.7898 | I=16.9, R1=17.5, R2=18.9 | USNO-B1 | ![]() | |
| 151.7 | 268.4539 | -25.7415 | B2=20.2, I=16.2, R2=17.8 | USNO-B1 | ![]() | |
| 151.9 | 268.3694 | -25.7466 | B1=20.5, I=14.0, R1=14.2 | USNO-B1 | ![]() | |
| 153.0 | 268.3691 | -25.7464 | B1=17.9, B2=16.7, R2=14.9 | USNO-B1 | ![]() | |
| 153.2 | 268.3662 | -25.7564 | B1=18.9, B2=17.2, I=14.1 | USNO-B1 | ![]() | |
| 153.3 | 268.3710 | -25.7816 | I=17.1, R1=16.3 | USNO-B1 | ![]() | |
| 153.5 | 268.3661 | -25.7561 | B1=19.6, I=15.2 | USNO-B1 | ![]() | |
| 153.6 | 268.3909 | -25.7243 | B2=19.7, R1=17.6, R2=18.4 | USNO-B1 | ![]() | |
| 153.6 | 268.3661 | -25.7562 | B=19.2, R2=17.3, i=16.8 | SSS | ![]() | |
| 155.5 | 268.4603 | -25.7691 | B1=19.9, B2=18.4, I=17.3, R1=16.3, R2=17.7 | USNO-B1 | ![]() | |
| 155.5 | 268.3790 | -25.7315 | B2=20.9, I=16.8, R1=18.0 | USNO-B1 | ![]() | |
| 155.5 | 268.4142 | -25.8052 | B1=17.0, B2=16.2, I=15.1, R1=14.5, R2=15.3 | USNO-B1 | ![]() | |
| 158.6 | 268.4416 | -25.7262 | I=17.0, R2=17.7 | USNO-B1 | ![]() | |
| 160.9 | 268.3800 | -25.7286 | B1=18.4, B2=17.5, I=15.7, R1=15.3, R2=15.8 | USNO-B1 | ![]() | |
| 161.9 | 268.3698 | -25.7395 | B1=19.6, B2=18.3, I=16.5, R1=16.5, R2=17.1 | USNO-B1 | ![]() | |
| 162.4 | 268.4612 | -25.7497 | B1=17.9, B2=17.1, I=15.3, R1=14.9, R2=15.6 | USNO-B1 | ![]() | |
| 163.0 | 268.3890 | -25.7222 | B1=19.9, B2=18.0, I=16.6, R1=16.2, R2=17.1 | USNO-B1 | ![]() | |
| 163.1 | 268.4626 | -25.7546 | B2=18.0, I=15.1, R1=15.8, R2=16.8 | USNO-B1 | ![]() | |
| 163.9 | 268.4625 | -25.7527 | B1=18.7, I=15.0 | USNO-B1 | ![]() | |
| 165.5 | 268.3625 | -25.7551 | B2=21.1, I=17.5 | USNO-B1 | ![]() | |
| 165.7 | 268.3717 | -25.7891 | B2=20.6, I=17.2, R1=17.6, R2=18.6 | USNO-B1 | ![]() | |
| 166.8 | 268.4526 | -25.7325 | B1=20.3, B2=18.8, I=16.3, R1=15.9, R2=17.6 | USNO-B1 | ![]() | |
| 168.4 | 268.4648 | -25.7587 | B2=18.8, I=14.8, R1=15.5, R2=16.5 | USNO-B1 | ![]() | |
| 170.6 | 268.3605 | -25.7656 | B2=20.9, I=17.2, R1=17.7, R2=18.8 | USNO-B1 | ![]() | |
| 170.7 | 268.3659 | -25.7408 | B1=17.1, B2=16.3, I=14.8, R1=14.6, R2=15.2 | USNO-B1 | ![]() | |
| 171.2 | 268.4573 | -25.7879 | B2=20.2, I=15.1, R1=15.6, R2=17.5 | USNO-B1 | ![]() | |
| 171.4 | 268.4610 | -25.7421 | B1=19.3, B2=17.4, I=13.9, R1=14.6, R2=14.8 | USNO-B1 | ![]() | |
| 171.5 | 268.4086 | -25.7145 | B2=18.8, I=15.6, R1=16.0, R2=16.7 | USNO-B1 | ![]() | |
| 171.6 | 268.4632 | -25.7771 | I=17.3, R1=17.4, R2=19.4 | USNO-B1 | ![]() | |
| 171.6 | 268.4632 | -25.7772 | B=20.3, R2=19.5, i=18.5 | SSS | ![]() | |
| 174.3 | 268.3632 | -25.7803 | I=17.9, R2=19.1 | USNO-B1 | ![]() | |
| 174.5 | 268.4465 | -25.7999 | B1=14.3, I=12.6 | USNO-B1 | ![]() | |
| 174.9 | 268.4668 | -25.7657 | B2=21.6, R1=18.0 | USNO-B1 | ![]() | |
| 175.6 | 268.4459 | -25.7233 | I=14.9, R1=15.8, R2=16.4 | USNO-B1 | ![]() | |
| 176.0 | 268.3995 | -25.8094 | B1=20.2, I=17.2 | USNO-B1 | ![]() | |
| 176.1 | 268.3771 | -25.7253 | B2=19.0, I=17.1, R1=16.9, R2=17.6 | USNO-B1 | ![]() | |
| 176.9 | 268.4110 | -25.7129 | B2=18.7, I=16.1, R1=16.4, R2=17.0 | USNO-B1 | ![]() | |
| 177.1 | 268.4457 | -25.8014 | B2=18.8, I=17.4, R1=17.1, R2=17.6 | USNO-B1 | ![]() | |
| 177.4 | 268.3813 | -25.8022 | B2=18.6, I=14.8, R1=15.3, R2=16.0 | USNO-B1 | ![]() | |
| 178.2 | 268.3815 | -25.8026 | R1=16.9, R2=16.3 | USNO-B1 | ![]() | |
| 178.3 | 268.4455 | -25.8020 | B=20.2, R2=19.1, i=18.5 | SSS | ![]() | |
| 178.5 | 268.4279 | -25.7143 | I=17.2, R2=19.4 | USNO-B1 | ![]() | |
| 179.2 | 268.4651 | -25.7785 | B2=20.1, I=16.8, R1=16.5, R2=18.0 | USNO-B1 | ![]() | |
| 179.7 | 268.3721 | -25.7283 | I=17.8, R1=17.8 | USNO-B1 | ![]() | |
| 179.9 | 268.3579 | -25.7563 | B2=21.2, I=18.4 | USNO-B1 | ![]() | |
| 180.2 | 268.3613 | -25.7436 | I=17.6, R1=17.9, R2=19.2 | USNO-B1 | ![]() | |
| 180.4 | 268.3574 | -25.7638 | B2=19.9, I=17.3, R1=17.0, R2=18.6 | USNO-B1 | ![]() | |
| 180.9 | 268.3618 | -25.7421 | B2=20.0, I=17.6, R1=16.7, R2=18.8 | USNO-B1 | ![]() | |
| 181.0 | 268.4687 | -25.7585 | B1=18.9, B2=17.5, I=14.7, R1=15.5, R2=16.5 | USNO-B1 | ![]() | |
| 181.2 | 268.3581 | -25.7524 | B1=17.1, B2=16.4, I=14.3, R1=14.6, R2=14.9 | USNO-B1 | ![]() | |
| 181.3 | 268.3839 | -25.8050 | B2=19.9, I=16.4, R1=17.3, R2=17.4 | USNO-B1 | ![]() | |
| 181.8 | 268.4683 | -25.7538 | I=16.3, R2=12.8 | USNO-B1 | ![]() | |
| 182.9 | 268.4351 | -25.7153 | B2=20.6, I=17.6, R1=17.7, R2=19.7 | USNO-B1 | ![]() | |
| 183.6 | 268.3663 | -25.7909 | B1=20.4, B2=18.5, R1=16.8, R2=17.9 | USNO-B1 | ![]() | |
| 184.1 | 268.4306 | -25.7134 | I=16.0, R1=17.4, R2=19.0 | USNO-B1 | ![]() | |
| 184.8 | 268.4030 | -25.8125 | B1=20.4, B2=18.4, I=17.2, R1=16.6, R2=17.9 | USNO-B1 | ![]() | |
| 184.9 | 268.3581 | -25.7480 | I=17.2, R1=17.3 | USNO-B1 | ![]() | |
| 185.5 | 268.3564 | -25.7543 | B2=21.1, I=17.3, R1=17.4, R2=18.8 | USNO-B1 | ![]() | |
| 186.0 | 268.3941 | -25.7132 | B2=19.9, I=18.2, R2=18.8 | USNO-B1 | ![]() | |
| 186.1 | 268.4692 | -25.7513 | B1=18.9, B2=17.2, I=14.1, R1=14.7, R2=15.5 | USNO-B1 | ![]() | |
| 186.6 | 268.4435 | -25.7180 | B1=20.1, B2=18.7, I=15.9, R1=16.0, R2=17.4 | USNO-B1 | ![]() | |
| 187.2 | 268.3554 | -25.7660 | B2=20.1, I=16.9, R1=17.0, R2=18.4 | USNO-B1 | ![]() | |
| 187.8 | 268.3882 | -25.7149 | B1=20.0, B2=18.4, I=15.6, R1=15.8, R2=16.6 | USNO-B1 | ![]() | |
| 187.8 | 268.3590 | -25.7431 | B1=19.4, B2=17.8, I=15.0, R1=15.1 | USNO-B1 | ![]() | |
| 188.0 | 268.4016 | -25.8132 | I=17.6, R1=17.8, R2=19.2 | USNO-B1 | ![]() | |
| 189.0 | 268.3616 | -25.7868 | B1=19.9, B2=18.4, I=15.4, R1=16.4, R2=17.5 | USNO-B1 | ![]() | |
| 190.4 | 268.3958 | -25.8126 | I=17.2, R2=19.3 | USNO-B1 | ![]() | |
| 190.6 | 268.4123 | -25.8149 | B=19.7, R2=18.5, i=17.8 | SSS | ![]() | |
| 190.9 | 268.3584 | -25.7422 | B1=19.1, B2=17.1, I=14.3, R1=14.6, R2=15.2 | USNO-B1 | ![]() | |
| 190.9 | 268.3893 | -25.8106 | B2=18.4, R1=17.4, R2=12.2 | USNO-B1 | ![]() | |
| 190.9 | 268.3541 | -25.7606 | I=16.9, R2=18.3 | USNO-B1 | ![]() | |
| 191.0 | 268.3789 | -25.7187 | B1=17.5, B2=17.1, I=15.0, R1=14.9, R2=15.4 | USNO-B1 | ![]() | |
| 191.2 | 268.3624 | -25.7348 | B1=17.2, B2=16.5, I=14.6, R1=14.7, R2=15.1 | USNO-B1 | ![]() | |
| 191.9 | 268.3863 | -25.7144 | B1=20.8, B2=20.9 | USNO-B1 | ![]() | |
| 192.0 | 268.4110 | -25.7087 | B1=19.4, B2=17.9, I=15.9, R1=16.0, R2=16.5 | USNO-B1 | ![]() | |
| 192.1 | 268.4631 | -25.7905 | B2=20.0, I=16.5, R1=16.5, R2=18.3 | USNO-B1 | ![]() | |
| 192.5 | 268.3973 | -25.8136 | B2=20.1, I=17.6, R1=17.1, R2=18.6 | USNO-B1 | ![]() | |
| 193.2 | 268.3890 | -25.8111 | B1=16.9, I=15.0 | USNO-B1 | ![]() | |
| 194.4 | 268.3661 | -25.7284 | B2=20.9, I=16.1, R1=17.3, R2=18.7 | USNO-B1 | ![]() | |
| 194.8 | 268.4673 | -25.7851 | B2=21.0, I=17.7, R1=17.2 | USNO-B1 | ![]() | |
| 196.9 | 268.4262 | -25.7086 | I=13.2, R1=13.0 | USNO-B1 | ![]() | |
| 197.6 | 268.3664 | -25.7266 | B=19.6, R2=17.9, i=16.4 | SSS | ![]() | |
| 197.7 | 268.3638 | -25.7945 | B2=20.8, I=17.4, R1=17.7, R2=18.8 | USNO-B1 | ![]() | |
| 197.9 | 268.3665 | -25.7264 | B2=18.5, I=15.0, R1=16.1, R2=16.4 | USNO-B1 | ![]() | |
| 199.6 | 268.3601 | -25.7336 | B1=19.4, B2=17.4, I=15.1, R1=15.2, R2=16.0 | USNO-B1 | ![]() |
Queried APM-N, SDSS, PSCz, SSS, NED, 2MASSX, USNO-B1.
* RA/Dec in equinox J2000
Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example