MASTER Net MASTER Database: GRB210318.13 pagePlease use the reference to MASTER DataBase as Lipunov et al., 2010, MASTER Robotic Net, Advances in Astronomy, vol. 2010, p.30L |
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MASTER WFC:
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MASTER II: |
General: |
| MASTER observatories and transients from them in error-field |
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MASTER optical transients in this field
Will be published in GCN, ATEL
| Distance | datetime | coord2000 | observatory | camera | links |
| trigger | notice | notice+1hr | now |
| 2021-03-18 03:08:33 (JD 2459291.630937) Siderial time 17.377529 h Ra 17:36:55.88 Dec -35:49:19.20 Rise n/a Transit n/a Set n/a AmurObject: Altitude: -24.64 Azimuth: 62.90 Sun: Altitude: 38.31 Azimuth: 350.90 Moon: Altitude: 32.76 Azimuth: 285.84 TunkaObject: Altitude: -12.93 Azimuth: 47.20 Sun: Altitude: 30.86 Azimuth: 322.45 Moon: Altitude: 17.41 Azimuth: 266.64 KislovodskObject: Altitude: 10.42 Azimuth: 1.10 Sun: Altitude: -2.21 Azimuth: 269.28 Moon: Altitude: -21.25 Azimuth: 219.37 TavridaObject: Altitude: 9.19 Azimuth: 354.11 Sun: Altitude: -8.23 Azimuth: 263.22 Moon: Altitude: -23.97 Azimuth: 211.12 SAAOObject: Altitude: 72.81 Azimuth: 287.16 Sun: Altitude: -19.35 Azimuth: 284.18 Moon: Altitude: -67.75 Azimuth: 314.93 IACObject: Altitude: 5.97 Azimuth: 316.44 Sun: Altitude: -51.20 Azimuth: 230.39 Moon: Altitude: -41.51 Azimuth: 152.35 ArgentinaObject: Altitude: 3.84 Azimuth: 310.44 Sun: Altitude: -50.11 Azimuth: 39.25 Moon: Altitude: -21.60 Azimuth: 95.51 MexicoObject: Altitude: -65.89 Azimuth: 289.09 Sun: Altitude: -21.78 Azimuth: 102.61 Moon: Altitude: 29.22 Azimuth: 91.38 UralObject: Altitude: -4.15 Azimuth: 14.83 Sun: Altitude: 7.20 Azimuth: 283.15 Moon: Altitude: -4.30 Azimuth: 232.18 VostryakovoObject: Altitude: -1.25 Azimuth: 357.26 Sun: Altitude: -4.70 Azimuth: 264.96 Moon: Altitude: -13.64 Azimuth: 212.82 Gal. latitude: -2.675644 Gal. longitude: 353.526644 Dist. to Sun: 92.185639 Dist. to Moon: 141.739047 Moon coord.: (47.690300 d, 15.653894 d) Sun coord.: (357.661697 d, -1.013355 d) Lunar disk: 0.193950 Lunar phase: 127.741467 Lunar bright limb: 256.049754 No SN in this field |
2021-03-18 21:33:05 (JD 2459292.397975) Siderial time 11.836820 h Ra 17:36:55.88 Dec -35:49:19.20 Rise n/a Transit n/a Set n/a AmurObject: Altitude: 3.81 Azimuth: 2.59 Sun: Altitude: -1.15 Azimuth: 269.73 Moon: Altitude: -15.95 Azimuth: 210.27 TunkaObject: Altitude: 0.42 Azimuth: 342.92 Sun: Altitude: -15.93 Azimuth: 249.99 Moon: Altitude: -19.39 Azimuth: 186.36 KislovodskObject: Altitude: -18.72 Azimuth: 302.08 Sun: Altitude: -46.81 Azimuth: 185.99 Moon: Altitude: -10.37 Azimuth: 128.59 TavridaObject: Altitude: -24.50 Azimuth: 296.99 Sun: Altitude: -45.81 Azimuth: 173.67 Moon: Altitude: -4.84 Azimuth: 122.28 SAAOObject: Altitude: 8.84 Azimuth: 307.06 Sun: Altitude: -52.96 Azimuth: 30.16 Moon: Altitude: -21.43 Azimuth: 99.01 IACObject: Altitude: -56.18 Azimuth: 292.99 Sun: Altitude: -30.77 Azimuth: 107.71 Moon: Altitude: 28.72 Azimuth: 96.77 ArgentinaObject: Altitude: -21.18 Azimuth: 11.82 Sun: Altitude: 15.41 Azimuth: 98.96 Moon: Altitude: 37.87 Azimuth: 163.19 MexicoObject: Altitude: -44.71 Azimuth: 68.58 Sun: Altitude: 46.59 Azimuth: 48.89 Moon: Altitude: 62.52 Azimuth: 290.57 UralObject: Altitude: -17.63 Azimuth: 309.69 Sun: Altitude: -31.19 Azimuth: 204.90 Moon: Altitude: -8.24 Azimuth: 144.62 VostryakovoObject: Altitude: -26.96 Azimuth: 294.77 Sun: Altitude: -35.33 Azimuth: 179.24 Moon: Altitude: -0.90 Azimuth: 125.72 Gal. latitude: -2.675644 Gal. longitude: 353.526644 Dist. to Sun: 92.930490 Dist. to Moon: 150.210434 Moon coord.: (56.667423 d, 18.587244 d) Sun coord.: (358.361789 d, -0.710037 d) Lunar disk: 0.254015 Lunar phase: 119.470160 Lunar bright limb: 258.105910 No SN in this field |
2021-03-18 22:33:05 (JD 2459292.439641) Siderial time 12.839558 h Ra 17:36:55.88 Dec -35:49:19.20 Rise n/a Transit n/a Set n/a AmurObject: Altitude: 2.37 Azimuth: 14.70 Sun: Altitude: 8.38 Azimuth: 281.35 Moon: Altitude: -10.26 Azimuth: 223.16 TunkaObject: Altitude: 2.20 Azimuth: 354.98 Sun: Altitude: -6.93 Azimuth: 262.25 Moon: Altitude: -17.14 Azimuth: 200.68 KislovodskObject: Altitude: -9.98 Azimuth: 310.86 Sun: Altitude: -43.71 Azimuth: 206.91 Moon: Altitude: -17.73 Azimuth: 140.61 TavridaObject: Altitude: -15.38 Azimuth: 305.59 Sun: Altitude: -44.97 Azimuth: 195.06 Moon: Altitude: -12.86 Azimuth: 133.63 SAAOObject: Altitude: 19.39 Azimuth: 300.76 Sun: Altitude: -56.83 Azimuth: 4.78 Moon: Altitude: -33.72 Azimuth: 91.95 IACObject: Altitude: -44.01 Azimuth: 293.83 Sun: Altitude: -42.91 Azimuth: 118.80 Moon: Altitude: 16.16 Azimuth: 102.93 ArgentinaObject: Altitude: -22.36 Azimuth: 358.76 Sun: Altitude: 2.70 Azimuth: 90.86 Moon: Altitude: 32.56 Azimuth: 147.60 MexicoObject: Altitude: -56.80 Azimuth: 70.88 Sun: Altitude: 35.93 Azimuth: 63.02 Moon: Altitude: 73.24 Azimuth: 314.36 UralObject: Altitude: -11.88 Azimuth: 320.80 Sun: Altitude: -26.72 Azimuth: 221.29 Moon: Altitude: -11.89 Azimuth: 158.12 VostryakovoObject: Altitude: -19.58 Azimuth: 305.33 Sun: Altitude: -34.07 Azimuth: 197.45 Moon: Altitude: -6.90 Azimuth: 138.15 Gal. latitude: -2.675644 Gal. longitude: 353.526644 Dist. to Sun: 92.970939 Dist. to Moon: 150.661745 Moon coord.: (57.163385 d, 18.734853 d) Sun coord.: (358.399805 d, -0.693562 d) Lunar disk: 0.257438 Lunar phase: 119.020622 Lunar bright limb: 258.238703 No SN in this field |
2025-05-09 10:00:21 (JD 2460804.916910) Siderial time 3.678619 h Ra 17:36:55.88 Dec -35:49:19.20 Rise n/a Transit n/a Set n/a AmurObject: Altitude: -44.66 Azimuth: 275.60 Sun: Altitude: 7.85 Azimuth: 107.84 Moon: Altitude: 20.59 Azimuth: 309.93 TunkaObject: Altitude: -59.72 Azimuth: 252.56 Sun: Altitude: 23.18 Azimuth: 88.95 Moon: Altitude: 6.58 Azimuth: 289.29 KislovodskObject: Altitude: -69.92 Azimuth: 104.99 Sun: Altitude: 61.16 Azimuth: 28.29 Moon: Altitude: -33.44 Azimuth: 243.59 TavridaObject: Altitude: -63.75 Azimuth: 98.41 Sun: Altitude: 62.29 Azimuth: 11.04 Moon: Altitude: -38.17 Azimuth: 234.79 SAAOObject: Altitude: -9.41 Azimuth: 36.15 Sun: Altitude: 39.67 Azimuth: 189.75 Moon: Altitude: -43.37 Azimuth: 321.54 IACObject: Altitude: -21.24 Azimuth: 59.74 Sun: Altitude: 47.22 Azimuth: 274.71 Moon: Altitude: -66.12 Azimuth: 154.09 ArgentinaObject: Altitude: 53.53 Azimuth: 71.36 Sun: Altitude: -15.68 Azimuth: 258.98 Moon: Altitude: -18.84 Azimuth: 69.39 MexicoObject: Altitude: 23.07 Azimuth: 2.59 Sun: Altitude: -27.60 Azimuth: 224.89 Moon: Altitude: 8.60 Azimuth: 77.04 UralObject: Altitude: -68.25 Azimuth: 164.24 Sun: Altitude: 44.14 Azimuth: 43.03 Moon: Altitude: -18.44 Azimuth: 252.81 VostryakovoObject: Altitude: -62.26 Azimuth: 122.76 Sun: Altitude: 51.37 Azimuth: 14.06 Moon: Altitude: -29.90 Azimuth: 232.86 Gal. latitude: -2.675644 Gal. longitude: 353.526644 Dist. to Sun: 141.684134 Dist. to Moon: 72.386928 Moon coord.: (191.303250 d, -6.483864 d) Sun coord.: (46.225697 d, 17.389539 d) Lunar disk: 0.906103 Lunar phase: 35.688060 Lunar bright limb: 290.903987 No SN in this field |
####################################################################################### ####################################################################################### ID = 3988 TYPE = 35 DAYS = 1 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | 67868 | MASTER-SAAO | C | 60 | 17.3 | 67948 | MASTER-SAAO | C | 60 | 17.4 | 68452 | MASTER-SAAO | C | 60 | 17.6 | 68532 | MASTER-SAAO | C | 60 | 17.7 | 69582 | MASTER-SAAO | C | 60 | 17.8 | 69662 | MASTER-SAAO | C | 60 | 17.8 | 69742 | MASTER-SAAO | C | 60 | 17.8 | 70696 | MASTER-SAAO | C | 180 | 18.2 | 72282 | MASTER-SAAO | C | 60 | 18.4 | 72740 | MASTER-SAAO | C | 180 | 18.4 | 75203 | MASTER-SAAO | C | 60 | 18.3 | 75283 | MASTER-SAAO | C | 60 | 18.4 | 75363 | MASTER-SAAO | C | 60 | 18.4 | 75443 | MASTER-SAAO | C | 60 | 18.4 | 75523 | MASTER-SAAO | C | 60 | 18.4 | 75602 | MASTER-SAAO | C | 60 | 18.4 | 75682 | MASTER-SAAO | C | 60 | 18.4 | 75762 | MASTER-SAAO | C | 60 | 18.4 | 75841 | MASTER-SAAO | C | 60 | 18.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3986 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | 67868 | MASTER-SAAO | C | 60 | 17.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3985 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | 67868 | MASTER-SAAO | C | 60 | 17.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3984 TYPE = 34 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | 67868 | MASTER-SAAO | C | 60 | 17.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3983 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3982 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3981 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3980 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3979 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3975 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3974 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.9 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | 66093 | MASTER-SAAO | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 3973 TYPE = 35 DAYS = 0 MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB210318.13 (trigger No 1037335,17h 36m 55.88s , -35d 49m 19.2s, R=0.01) errorbox 65903 sec after trigger time at 2021-03-18 21:26:56 UT, with upper limit up to 14.5 mag. The observations began at zenith distance = 83 deg. The sun altitude is -52.2 deg. The galactic latitude b = -3 deg., longitude l = 354 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1571373 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 65934 | MASTER-SAAO | C | 60 | 14.1 | 66013 | MASTER-SAAO | C | 60 | 14.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
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