MASTER Net MASTER Database: GRB210406.72 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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id noticetime coord2000 satel errorbox type trigger seq trig_type links
1585520
2021-04-06 17:46:48.14013
08h 49m 50.12s +76d 31m 56.6s
INTEGRAL
0.025
alert
9126
3
55
alert
1585493
2021-04-06 17:14:57.124876
08h 49m 47.73s +76d 31m 38.6s
INTEGRAL
0.0425
alert
9126
2
54
alert
1585485
2021-04-06 17:12:10.922197
08h 49m 46.12s +76d 30m 59.0s
INTEGRAL
0.0516667
alert
9126
-1
53
alert
MASTER optical transients in this field
Will be published in GCN, ATEL
Distance | datetime | coord2000 | observatory | camera | links |
32.5 | 2021-04-06 17:10:58.564 | 10h 15m 15.00s +45d 13m 02.0s | Kislovodsk | 29007 | Database Kislovodsk |
72.4 | 2021-04-06 17:10:53.08 | 13h 05m 11.00s +11d 59m 58.0s | Tunka | 100628 | Database Tunka |
43.6 | 2021-04-06 17:09:32.915 | 15h 20m 55.00s +49d 59m 59.0s | Tunka | 100629 | Database Tunka |
32.5 | 2021-04-06 17:10:41.587 | 10h 15m 15.00s +45d 13m 02.0s | Kislovodsk | 111339 | Database Kislovodsk |
120.1 | 2021-04-06 17:08:29.228 | 06h 18m 05.00s -41d 07m 53.0s | SAAO | 111341 | Database SAAO |
trigger | notice | notice+1hr | now |
2021-04-06 17:11:28 (JD 2459311.216296) Siderial time 8.713091 h Ra 08:49:46.12 Dec 76:31:00.00 Rise n/a Transit n/a Set n/a AmurObject: Altitude: 48.88 Azimuth: 159.25 Sun: Altitude: -29.07 Azimuth: 208.77 Moon: Altitude: -21.03 Azimuth: 277.38 TunkaObject: Altitude: 55.91 Azimuth: 158.10 Sun: Altitude: -31.58 Azimuth: 180.75 Moon: Altitude: -36.21 Azimuth: 257.06 KislovodskObject: Altitude: 57.20 Azimuth: 178.64 Sun: Altitude: -16.27 Azimuth: 116.45 Moon: Altitude: -66.73 Azimuth: 172.00 TavridaObject: Altitude: 58.14 Azimuth: 182.36 Sun: Altitude: -10.29 Azimuth: 110.16 Moon: Altitude: -63.99 Azimuth: 153.95 SAAOObject: Altitude: -19.52 Azimuth: 184.51 Sun: Altitude: -10.60 Azimuth: 91.15 Moon: Altitude: -31.79 Azimuth: 27.82 IACObject: Altitude: 35.18 Azimuth: 193.66 Sun: Altitude: 28.54 Azimuth: 81.72 Moon: Altitude: -33.29 Azimuth: 82.78 ArgentinaObject: Altitude: -35.17 Azimuth: 195.68 Sun: Altitude: 50.79 Azimuth: 166.97 Moon: Altitude: 31.65 Azimuth: 83.96 MexicoObject: Altitude: 19.21 Azimuth: 187.15 Sun: Altitude: 50.77 Azimuth: 301.67 Moon: Altitude: 33.50 Azimuth: 26.84 UralObject: Altitude: 69.22 Azimuth: 166.90 Sun: Altitude: -17.42 Azimuth: 134.89 Moon: Altitude: -52.25 Azimuth: 201.14 VostryakovoObject: Altitude: 68.86 Azimuth: 181.00 Sun: Altitude: -8.46 Azimuth: 114.86 Moon: Altitude: -54.74 Azimuth: 166.83 Gal. latitude: 33.478261 Gal. longitude: 136.982351 Dist. to Sun: 89.595702 Dist. to Moon: 124.035969 Moon coord.: (318.970420 d, -20.650230 d) Sun coord.: (15.504618 d, 6.612672 d) Lunar disk: 0.265143 Lunar phase: 118.015741 Lunar bright limb: 70.039308 No SN in this field |
2021-04-06 17:12:10 (JD 2459311.216782) Siderial time 8.724790 h Ra 08:49:46.12 Dec 76:31:00.00 Rise n/a Transit n/a Set n/a AmurObject: Altitude: 48.84 Azimuth: 159.26 Sun: Altitude: -29.02 Azimuth: 208.96 Moon: Altitude: -20.92 Azimuth: 277.50 TunkaObject: Altitude: 55.87 Azimuth: 158.09 Sun: Altitude: -31.57 Azimuth: 180.95 Moon: Altitude: -36.11 Azimuth: 257.21 KislovodskObject: Altitude: 57.20 Azimuth: 178.57 Sun: Altitude: -16.39 Azimuth: 116.59 Moon: Altitude: -66.75 Azimuth: 172.40 TavridaObject: Altitude: 58.14 Azimuth: 182.28 Sun: Altitude: -10.41 Azimuth: 110.29 Moon: Altitude: -64.04 Azimuth: 154.29 SAAOObject: Altitude: -19.51 Azimuth: 184.47 Sun: Altitude: -10.75 Azimuth: 91.05 Moon: Altitude: -31.86 Azimuth: 27.65 IACObject: Altitude: 35.22 Azimuth: 193.64 Sun: Altitude: 28.39 Azimuth: 81.82 Moon: Altitude: -33.44 Azimuth: 82.85 ArgentinaObject: Altitude: -35.13 Azimuth: 195.68 Sun: Altitude: 50.75 Azimuth: 166.71 Moon: Altitude: 31.50 Azimuth: 83.88 MexicoObject: Altitude: 19.23 Azimuth: 187.18 Sun: Altitude: 50.90 Azimuth: 301.85 Moon: Altitude: 33.44 Azimuth: 27.01 UralObject: Altitude: 69.20 Azimuth: 166.80 Sun: Altitude: -17.49 Azimuth: 135.05 Moon: Altitude: -52.21 Azimuth: 201.39 VostryakovoObject: Altitude: 68.86 Azimuth: 180.89 Sun: Altitude: -8.55 Azimuth: 115.01 Moon: Altitude: -54.76 Azimuth: 167.10 Gal. latitude: 33.478261 Gal. longitude: 136.982351 Dist. to Sun: 89.595431 Dist. to Moon: 124.034126 Moon coord.: (318.976909 d, -20.648581 d) Sun coord.: (15.505063 d, 6.612856 d) Lunar disk: 0.265098 Lunar phase: 118.021542 Lunar bright limb: 70.036789 No SN in this field |
2021-04-06 18:12:10 (JD 2459311.258449) Siderial time 9.727527 h Ra 08:49:46.12 Dec 76:31:00.00 Rise n/a Transit n/a Set n/a AmurObject: Altitude: 45.57 Azimuth: 161.09 Sun: Altitude: -23.29 Azimuth: 224.31 Moon: Altitude: -11.80 Azimuth: 287.98 TunkaObject: Altitude: 52.37 Azimuth: 157.99 Sun: Altitude: -30.01 Azimuth: 198.22 Moon: Altitude: -27.12 Azimuth: 269.16 KislovodskObject: Altitude: 56.33 Azimuth: 172.38 Sun: Altitude: -25.47 Azimuth: 129.26 Moon: Altitude: -64.93 Azimuth: 205.63 TavridaObject: Altitude: 57.95 Azimuth: 175.68 Sun: Altitude: -19.95 Azimuth: 122.17 Moon: Altitude: -65.67 Azimuth: 186.33 SAAOObject: Altitude: -18.92 Azimuth: 180.82 Sun: Altitude: -23.40 Azimuth: 82.79 Moon: Altitude: -36.18 Azimuth: 12.12 IACObject: Altitude: 38.08 Azimuth: 191.13 Sun: Altitude: 15.23 Azimuth: 89.38 Moon: Altitude: -46.10 Azimuth: 89.18 ArgentinaObject: Altitude: -31.63 Azimuth: 195.86 Sun: Altitude: 45.54 Azimuth: 145.68 Moon: Altitude: 19.30 Azimuth: 77.32 MexicoObject: Altitude: 21.19 Azimuth: 190.27 Sun: Altitude: 60.52 Azimuth: 322.31 Moon: Altitude: 26.64 Azimuth: 40.58 UralObject: Altitude: 66.83 Azimuth: 159.93 Sun: Altitude: -22.44 Azimuth: 150.02 Moon: Altitude: -47.95 Azimuth: 221.54 VostryakovoObject: Altitude: 68.28 Azimuth: 171.44 Sun: Altitude: -15.78 Azimuth: 128.35 Moon: Altitude: -54.78 Azimuth: 190.71 Gal. latitude: 33.478261 Gal. longitude: 136.982351 Dist. to Sun: 89.572186 Dist. to Moon: 123.874650 Moon coord.: (319.532346 d, -20.506365 d) Sun coord.: (15.543182 d, 6.628572 d) Lunar disk: 0.261278 Lunar phase: 118.518534 Lunar bright limb: 69.821504 No SN in this field |
2024-12-25 14:10:00 (JD 2460670.090278) Siderial time 22.980018 h Ra 08:49:46.12 Dec 76:31:00.00 Rise n/a Transit n/a Set n/a AmurObject: Altitude: 55.85 Azimuth: 200.60 Sun: Altitude: -59.00 Azimuth: 143.03 Moon: Altitude: -39.28 Azimuth: 242.09 TunkaObject: Altitude: 51.59 Azimuth: 201.84 Sun: Altitude: -45.99 Azimuth: 113.07 Moon: Altitude: -49.51 Azimuth: 211.63 KislovodskObject: Altitude: 32.56 Azimuth: 189.62 Sun: Altitude: -6.11 Azimuth: 63.24 Moon: Altitude: -45.44 Azimuth: 117.86 TavridaObject: Altitude: 32.62 Azimuth: 187.63 Sun: Altitude: -1.30 Azimuth: 57.55 Moon: Altitude: -39.48 Azimuth: 110.46 SAAOObject: Altitude: -45.28 Azimuth: 185.06 Sun: Altitude: 42.26 Azimuth: 86.62 Moon: Altitude: -14.53 Azimuth: 61.49 IACObject: Altitude: 15.69 Azimuth: 174.82 Sun: Altitude: 35.98 Azimuth: 18.55 Moon: Altitude: 0.64 Azimuth: 72.75 ArgentinaObject: Altitude: -34.39 Azimuth: 164.19 Sun: Altitude: 56.72 Azimuth: 264.64 Moon: Altitude: 59.17 Azimuth: 116.84 MexicoObject: Altitude: 36.04 Azimuth: 164.95 Sun: Altitude: -2.05 Azimuth: 296.24 Moon: Altitude: 42.50 Azimuth: 343.08 UralObject: Altitude: 47.87 Azimuth: 196.37 Sun: Altitude: -20.70 Azimuth: 78.62 Moon: Altitude: -44.37 Azimuth: 148.26 VostryakovoObject: Altitude: 43.51 Azimuth: 189.93 Sun: Altitude: -8.83 Azimuth: 61.18 Moon: Altitude: -36.97 Azimuth: 121.78 Gal. latitude: 33.478261 Gal. longitude: 136.982351 Dist. to Sun: 123.662707 Dist. to Moon: 101.444109 Moon coord.: (209.520444 d, -14.825122 d) Sun coord.: (274.287358 d, -23.388227 d) Lunar disk: 0.261083 Lunar phase: 118.543999 Lunar bright limb: 108.904632 No SN in this field |
####################################################################################### ####################################################################################### ID = 4059 TYPE = 35 DAYS = 1 MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the INTEGRAL GRB210406.72 (trigger No 9126,08h 49m 50.12s , +76d 31m 56.6s, R=0.025) errorbox 10 sec after notice time and 2 sec after trigger time at 2021-04-06 17:11:57 UT, with upper limit up to 19.0 mag. Observations started at twilight. The observations began at zenith distance = 34 deg. The sun altitude is -16.3 deg. The galactic latitude b = 33 deg., longitude l = 137 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1585520 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 8 | MASTER-Kislovodsk | P- | 10 | 14.6 | 26 | MASTER-Kislovodsk | P- | 10 | 14.5 | 44 | MASTER-Kislovodsk | P- | 10 | 14.6 | 67 | MASTER-Kislovodsk | P- | 20 | 16.7 | 94 | MASTER-Kislovodsk | P- | 20 | 16.6 | 124 | MASTER-Kislovodsk | P- | 80 | 17.3 | Coadd 494 | MASTER-Kislovodsk | P- | 820 | 19.0 | Coadd 127 | MASTER-Kislovodsk | P- | 30 | 16.8 | 165 | MASTER-Kislovodsk | P- | 30 | 17.0 | 208 | MASTER-Kislovodsk | P- | 40 | 16.9 | 263 | MASTER-Kislovodsk | P- | 150 | 17.3 | Coadd 261 | MASTER-Kislovodsk | P- | 50 | 16.9 | 324 | MASTER-Kislovodsk | P- | 60 | 16.9 | 402 | MASTER-Kislovodsk | P- | 80 | 17.0 | 502 | MASTER-Kislovodsk | P- | 280 | 17.7 | Coadd 495 | MASTER-Kislovodsk | P- | 90 | 17.0 | 603 | MASTER-Kislovodsk | P- | 110 | 17.3 | 736 | MASTER-Kislovodsk | P- | 140 | 17.4 | 898 | MASTER-Kislovodsk | P- | 170 | 17.4 | 1081 | MASTER-Kislovodsk | P- | 180 | 17.6 | 1282 | MASTER-Kislovodsk | P- | 180 | 17.6 | 1462 | MASTER-Kislovodsk | P- | 540 | 17.7 | Coadd 1482 | MASTER-Kislovodsk | P- | 180 | 18.0 | 1683 | MASTER-Kislovodsk | P- | 180 | 15.8 | 5045 | MASTER- | C | 60 | 18.5 | 5045 | MASTER- | C | 60 | 18.5 | 5120 | MASTER- | C | 60 | 18.7 | 5120 | MASTER- | C | 60 | 18.5 | 5195 | MASTER- | C | 60 | 18.8 | 5195 | MASTER- | C | 60 | 18.5 | 5269 | MASTER- | C | 60 | 19.0 | 5269 | MASTER- | C | 60 | 18.5 | 5344 | MASTER- | C | 60 | 18.8 | 5344 | MASTER- | C | 60 | 18.6 | 5419 | MASTER- | C | 60 | 18.8 | 5419 | MASTER- | C | 60 | 18.5 | 5494 | MASTER- | C | 60 | 18.9 | 5494 | MASTER- | C | 60 | 18.5 | 5569 | MASTER- | C | 60 | 18.8 | 5569 | MASTER- | C | 60 | 18.5 | 5642 | MASTER- | C | 60 | 18.8 | 5642 | MASTER- | C | 60 | 18.5 | 5717 | MASTER- | C | 60 | 18.9 | 5717 | MASTER- | C | 60 | 18.6 | 5792 | MASTER- | C | 60 | 18.7 | 5792 | MASTER- | C | 60 | 18.4 | 5867 | MASTER- | C | 60 | 18.7 | 5867 | MASTER- | C | 60 | 18.5 | 5941 | MASTER- | C | 60 | 18.8 | 5941 | MASTER- | C | 60 | 18.5 | 6016 | MASTER- | C | 60 | 18.7 | 6016 | MASTER- | C | 60 | 18.5 | 6091 | MASTER- | C | 60 | 18.6 | 6091 | MASTER- | C | 60 | 18.5 | 6165 | MASTER- | C | 60 | 18.7 | 6165 | MASTER- | C | 60 | 18.5 | 6239 | MASTER- | C | 60 | 18.7 | 6239 | MASTER- | C | 60 | 18.5 | 6314 | MASTER- | C | 60 | 18.8 | 6314 | MASTER- | C | 60 | 18.3 | 6389 | MASTER- | C | 60 | 18.8 | 6389 | MASTER- | C | 60 | 18.5 | 6464 | MASTER- | C | 60 | 18.8 | 6464 | MASTER- | C | 60 | 18.6 | 6537 | MASTER- | C | 60 | 18.7 | 6537 | MASTER- | C | 60 | 18.6 | 6612 | MASTER- | C | 60 | 18.8 | 6612 | MASTER- | C | 60 | 18.4 | 6685 | MASTER- | C | 60 | 19.0 | 6685 | MASTER- | C | 60 | 18.6 | 6760 | MASTER- | C | 60 | 19.0 | 6760 | MASTER- | C | 60 | 18.5 | 6930 | MASTER- | C | 20 | 18.7 | 6930 | MASTER- | C | 20 | 18.5 | 7016 | MASTER-Kislovodsk | C | 180 | 17.5 | 7016 | MASTER-Kislovodsk | C | 180 | 16.2 | 6964 | MASTER- | C | 20 | 19.0 | 6965 | MASTER- | C | 20 | 18.9 | 7001 | MASTER- | C | 20 | 18.7 | 7001 | MASTER- | C | 20 | 18.6 | 7037 | MASTER- | C | 20 | 18.9 | 7037 | MASTER- | C | 20 | 18.6 | 7072 | MASTER- | C | 20 | 18.9 | 7072 | MASTER- | C | 20 | 18.4 | 7107 | MASTER- | C | 20 | 18.7 | 7107 | MASTER- | C | 20 | 18.5 | 7216 | MASTER-Kislovodsk | C | 180 | 17.2 | 7216 | MASTER-Kislovodsk | C | 180 | 15.7 | 7143 | MASTER- | C | 20 | 18.8 | 7143 | MASTER- | C | 20 | 18.6 | 7178 | MASTER- | C | 20 | 18.7 | 7178 | MASTER- | C | 20 | 18.4 | 7213 | MASTER- | C | 20 | 18.8 | 7213 | MASTER- | C | 20 | 18.5 | 7250 | MASTER- | C | 20 | 18.8 | 7250 | MASTER- | C | 20 | 18.6 | 7285 | MASTER- | C | 20 | 18.8 | 7285 | MASTER- | C | 20 | 18.5 | 7319 | MASTER- | C | 20 | 18.7 | 7319 | MASTER- | C | 20 | 18.5 | 7417 | MASTER-Kislovodsk | C | 180 | 16.3 | 7417 | MASTER-Kislovodsk | C | 180 | 15.4 | 7524 | MASTER- | C | 20 | 18.9 | 7524 | MASTER- | C | 20 | 18.8 | 7617 | MASTER-Kislovodsk | C | 180 | 16.7 | 7617 | MASTER-Kislovodsk | C | 180 | 15.0 | 7558 | MASTER- | C | 20 | 18.7 | 7558 | MASTER- | C | 20 | 18.5 | 7592 | MASTER- | C | 20 | 18.8 | 7592 | MASTER- | C | 20 | 18.5 | 7627 | MASTER- | C | 20 | 18.6 | 7627 | MASTER- | C | 20 | 18.5 | 7663 | MASTER- | C | 20 | 18.6 | 7663 | MASTER- | C | 20 | 18.4 | 7698 | MASTER- | C | 20 | 18.8 | 7698 | MASTER- | C | 20 | 18.5 | 7733 | MASTER- | C | 20 | 18.7 | 7733 | MASTER- | C | 20 | 18.5 | 7818 | MASTER-Kislovodsk | C | 180 | 16.9 | 7818 | MASTER-Kislovodsk | C | 180 | 15.7 | 7763 | MASTER- | C | 10 | 18.5 | 7763 | MASTER- | C | 10 | 18.1 | 7796 | MASTER- | C | 10 | 18.4 | 7796 | MASTER- | C | 10 | 18.2 | 7822 | MASTER- | C | 10 | 18.4 | 7822 | MASTER- | C | 10 | 18.3 | 7856 | MASTER- | C | 10 | 18.4 | 7856 | MASTER- | C | 10 | 18.2 | 7882 | MASTER- | C | 10 | 18.5 | 7882 | MASTER- | C | 10 | 18.3 | 8018 | MASTER-Kislovodsk | C | 180 | 17.4 | 8018 | MASTER-Kislovodsk | C | 180 | 16.2 | 8121 | MASTER- | C | 10 | 18.5 | 8122 | MASTER- | C | 10 | 18.1 | 8219 | MASTER-Kislovodsk | C | 180 | 17.3 | 8219 | MASTER-Kislovodsk | C | 180 | 16.2 | 8153 | MASTER- | C | 10 | 18.5 | 8153 | MASTER- | C | 10 | 18.2 | 8178 | MASTER- | C | 10 | 18.4 | 8179 | MASTER- | C | 10 | 18.1 | 8203 | MASTER- | C | 10 | 18.5 | 8203 | MASTER- | C | 10 | 18.1 | 8228 | MASTER- | C | 10 | 18.4 | 8228 | MASTER- | C | 10 | 18.1 | 8260 | MASTER- | C | 10 | 18.5 | 8260 | MASTER- | C | 10 | 18.4 | 8285 | MASTER- | C | 10 | 18.5 | 8285 | MASTER- | C | 10 | 18.1 | 8310 | MASTER- | C | 10 | 18.5 | 8311 | MASTER- | C | 10 | 18.1 | 8419 | MASTER-Kislovodsk | C | 180 | 17.0 | 8419 | MASTER-Kislovodsk | C | 180 | 16.1 | 8343 | MASTER- | C | 10 | 18.2 | 8343 | MASTER- | C | 10 | 18.1 | 8368 | MASTER- | C | 10 | 18.5 | 8368 | MASTER- | C | 10 | 18.4 | 8400 | MASTER- | C | 10 | 18.5 | 8400 | MASTER- | C | 10 | 18.1 | 8918 | MASTER-Kislovodsk | C | 180 | 14.8 | 8918 | MASTER-Kislovodsk | C | 180 | 16.5 | 9118 | MASTER-Kislovodsk | C | 180 | 16.8 | 9118 | MASTER-Kislovodsk | C | 180 | 14.9 | 9319 | MASTER-Kislovodsk | C | 180 | 17.2 | 9319 | MASTER-Kislovodsk | C | 180 | 15.1 | 9520 | MASTER-Kislovodsk | C | 180 | 16.7 | 9720 | MASTER-Kislovodsk | C | 180 | 16.7 | 9720 | MASTER-Kislovodsk | C | 180 | 12.3 | 14701 | MASTER-Kislovodsk | C | 180 | 18.2 | 14881 | MASTER-Kislovodsk | C | 540 | 18.6 | Coadd 14701 | MASTER-Kislovodsk | C | 180 | 12.3 | 14902 | MASTER-Kislovodsk | C | 180 | 17.6 | 14902 | MASTER-Kislovodsk | C | 180 | 14.2 | 15102 | MASTER-Kislovodsk | C | 180 | 18.1 | 15102 | MASTER-Kislovodsk | C | 180 | 14.8 | 15302 | MASTER-Kislovodsk | C | 180 | 17.9 | 15482 | MASTER-Kislovodsk | C | 540 | 18.8 | Coadd 15302 | MASTER-Kislovodsk | C | 180 | 15.3 | 15502 | MASTER-Kislovodsk | C | 180 | 18.1 | 15502 | MASTER-Kislovodsk | C | 180 | 15.2 | 15703 | MASTER-Kislovodsk | C | 180 | 17.8 | 15703 | MASTER-Kislovodsk | C | 180 | 15.1 | 15903 | MASTER-Kislovodsk | C | 180 | 18.3 | 15903 | MASTER-Kislovodsk | C | 180 | 15.4 | 16104 | MASTER-Kislovodsk | C | 180 | 18.4 | 16104 | MASTER-Kislovodsk | C | 180 | 15.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 4058 TYPE = 35 DAYS = 0.5 MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the INTEGRAL GRB210406.72 (trigger No 9126,08h 49m 50.12s , +76d 31m 56.6s, R=0.025) errorbox 10 sec after notice time and 2 sec after trigger time at 2021-04-06 17:11:57 UT, with upper limit up to 19.0 mag. Observations started at twilight. The observations began at zenith distance = 34 deg. The sun altitude is -16.3 deg. The galactic latitude b = 33 deg., longitude l = 137 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1585518 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 8 | MASTER-Kislovodsk | P- | 10 | 14.6 | 26 | MASTER-Kislovodsk | P- | 10 | 14.5 | 44 | MASTER-Kislovodsk | P- | 10 | 14.6 | 67 | MASTER-Kislovodsk | P- | 20 | 16.7 | 94 | MASTER-Kislovodsk | P- | 20 | 16.6 | 124 | MASTER-Kislovodsk | P- | 80 | 17.3 | Coadd 494 | MASTER-Kislovodsk | P- | 820 | 19.0 | Coadd 127 | MASTER-Kislovodsk | P- | 30 | 16.8 | 165 | MASTER-Kislovodsk | P- | 30 | 17.0 | 208 | MASTER-Kislovodsk | P- | 40 | 16.9 | 263 | MASTER-Kislovodsk | P- | 150 | 17.3 | Coadd 261 | MASTER-Kislovodsk | P- | 50 | 16.9 | 324 | MASTER-Kislovodsk | P- | 60 | 16.9 | 402 | MASTER-Kislovodsk | P- | 80 | 17.0 | 502 | MASTER-Kislovodsk | P- | 280 | 17.7 | Coadd 495 | MASTER-Kislovodsk | P- | 90 | 17.0 | 603 | MASTER-Kislovodsk | P- | 110 | 17.3 | 736 | MASTER-Kislovodsk | P- | 140 | 17.4 | 898 | MASTER-Kislovodsk | P- | 170 | 17.4 | 1081 | MASTER-Kislovodsk | P- | 180 | 17.6 | 1282 | MASTER-Kislovodsk | P- | 180 | 17.6 | 1462 | MASTER-Kislovodsk | P- | 540 | 17.7 | Coadd 1482 | MASTER-Kislovodsk | P- | 180 | 18.0 | 1683 | MASTER-Kislovodsk | P- | 180 | 15.8 | 5045 | MASTER- | C | 60 | 18.5 | 5045 | MASTER- | C | 60 | 18.5 | 5120 | MASTER- | C | 60 | 18.7 | 5120 | MASTER- | C | 60 | 18.5 | 5195 | MASTER- | C | 60 | 18.8 | 5195 | MASTER- | C | 60 | 18.5 | 5269 | MASTER- | C | 60 | 19.0 | 5269 | MASTER- | C | 60 | 18.5 | 5344 | MASTER- | C | 60 | 18.8 | 5344 | MASTER- | C | 60 | 18.6 | 5419 | MASTER- | C | 60 | 18.8 | 5419 | MASTER- | C | 60 | 18.5 | 5494 | MASTER- | C | 60 | 18.9 | 5494 | MASTER- | C | 60 | 18.5 | 5569 | MASTER- | C | 60 | 18.8 | 5569 | MASTER- | C | 60 | 18.5 | 5642 | MASTER- | C | 60 | 18.8 | 5642 | MASTER- | C | 60 | 18.5 | 5717 | MASTER- | C | 60 | 18.9 | 5717 | MASTER- | C | 60 | 18.6 | 5792 | MASTER- | C | 60 | 18.7 | 5792 | MASTER- | C | 60 | 18.4 | 5867 | MASTER- | C | 60 | 18.7 | 5867 | MASTER- | C | 60 | 18.5 | 5941 | MASTER- | C | 60 | 18.8 | 5941 | MASTER- | C | 60 | 18.5 | 6016 | MASTER- | C | 60 | 18.7 | 6016 | MASTER- | C | 60 | 18.5 | 6091 | MASTER- | C | 60 | 18.6 | 6091 | MASTER- | C | 60 | 18.5 | 6165 | MASTER- | C | 60 | 18.7 | 6165 | MASTER- | C | 60 | 18.5 | 6239 | MASTER- | C | 60 | 18.7 | 6239 | MASTER- | C | 60 | 18.5 | 6314 | MASTER- | C | 60 | 18.8 | 6314 | MASTER- | C | 60 | 18.3 | 6389 | MASTER- | C | 60 | 18.8 | 6389 | MASTER- | C | 60 | 18.5 | 6464 | MASTER- | C | 60 | 18.8 | 6464 | MASTER- | C | 60 | 18.6 | 6537 | MASTER- | C | 60 | 18.7 | 6537 | MASTER- | C | 60 | 18.6 | 6612 | MASTER- | C | 60 | 18.8 | 6612 | MASTER- | C | 60 | 18.4 | 6685 | MASTER- | C | 60 | 19.0 | 6685 | MASTER- | C | 60 | 18.6 | 6760 | MASTER- | C | 60 | 19.0 | 6760 | MASTER- | C | 60 | 18.5 | 6930 | MASTER- | C | 20 | 18.7 | 6930 | MASTER- | C | 20 | 18.5 | 7016 | MASTER-Kislovodsk | C | 180 | 17.5 | 7016 | MASTER-Kislovodsk | C | 180 | 16.2 | 6964 | MASTER- | C | 20 | 19.0 | 6965 | MASTER- | C | 20 | 18.9 | 7001 | MASTER- | C | 20 | 18.7 | 7001 | MASTER- | C | 20 | 18.6 | 7037 | MASTER- | C | 20 | 18.9 | 7037 | MASTER- | C | 20 | 18.6 | 7072 | MASTER- | C | 20 | 18.9 | 7072 | MASTER- | C | 20 | 18.4 | 7107 | MASTER- | C | 20 | 18.7 | 7107 | MASTER- | C | 20 | 18.5 | 7216 | MASTER-Kislovodsk | C | 180 | 17.2 | 7216 | MASTER-Kislovodsk | C | 180 | 15.7 | 7143 | MASTER- | C | 20 | 18.8 | 7143 | MASTER- | C | 20 | 18.6 | 7178 | MASTER- | C | 20 | 18.7 | 7178 | MASTER- | C | 20 | 18.4 | 7213 | MASTER- | C | 20 | 18.8 | 7213 | MASTER- | C | 20 | 18.5 | 7250 | MASTER- | C | 20 | 18.8 | 7250 | MASTER- | C | 20 | 18.6 | 7285 | MASTER- | C | 20 | 18.8 | 7285 | MASTER- | C | 20 | 18.5 | 7319 | MASTER- | C | 20 | 18.7 | 7319 | MASTER- | C | 20 | 18.5 | 7417 | MASTER-Kislovodsk | C | 180 | 16.3 | 7417 | MASTER-Kislovodsk | C | 180 | 15.4 | 7524 | MASTER- | C | 20 | 18.9 | 7524 | MASTER- | C | 20 | 18.8 | 7617 | MASTER-Kislovodsk | C | 180 | 16.7 | 7617 | MASTER-Kislovodsk | C | 180 | 15.0 | 7558 | MASTER- | C | 20 | 18.7 | 7558 | MASTER- | C | 20 | 18.5 | 7592 | MASTER- | C | 20 | 18.8 | 7592 | MASTER- | C | 20 | 18.5 | 7627 | MASTER- | C | 20 | 18.6 | 7627 | MASTER- | C | 20 | 18.5 | 7663 | MASTER- | C | 20 | 18.6 | 7663 | MASTER- | C | 20 | 18.4 | 7698 | MASTER- | C | 20 | 18.8 | 7698 | MASTER- | C | 20 | 18.5 | 7733 | MASTER- | C | 20 | 18.7 | 7733 | MASTER- | C | 20 | 18.5 | 7818 | MASTER-Kislovodsk | C | 180 | 16.9 | 7818 | MASTER-Kislovodsk | C | 180 | 15.7 | 7763 | MASTER- | C | 10 | 18.5 | 7763 | MASTER- | C | 10 | 18.1 | 7796 | MASTER- | C | 10 | 18.4 | 7796 | MASTER- | C | 10 | 18.2 | 7822 | MASTER- | C | 10 | 18.4 | 7822 | MASTER- | C | 10 | 18.3 | 7856 | MASTER- | C | 10 | 18.4 | 7856 | MASTER- | C | 10 | 18.2 | 7882 | MASTER- | C | 10 | 18.5 | 7882 | MASTER- | C | 10 | 18.3 | 8018 | MASTER-Kislovodsk | C | 180 | 17.4 | 8018 | MASTER-Kislovodsk | C | 180 | 16.2 | 8121 | MASTER- | C | 10 | 18.5 | 8122 | MASTER- | C | 10 | 18.1 | 8219 | MASTER-Kislovodsk | C | 180 | 17.3 | 8219 | MASTER-Kislovodsk | C | 180 | 16.2 | 8153 | MASTER- | C | 10 | 18.5 | 8153 | MASTER- | C | 10 | 18.2 | 8178 | MASTER- | C | 10 | 18.4 | 8179 | MASTER- | C | 10 | 18.1 | 8203 | MASTER- | C | 10 | 18.5 | 8203 | MASTER- | C | 10 | 18.1 | 8228 | MASTER- | C | 10 | 18.4 | 8228 | MASTER- | C | 10 | 18.1 | 8260 | MASTER- | C | 10 | 18.5 | 8260 | MASTER- | C | 10 | 18.4 | 8285 | MASTER- | C | 10 | 18.5 | 8285 | MASTER- | C | 10 | 18.1 | 8310 | MASTER- | C | 10 | 18.5 | 8311 | MASTER- | C | 10 | 18.1 | 8419 | MASTER-Kislovodsk | C | 180 | 17.0 | 8419 | MASTER-Kislovodsk | C | 180 | 16.1 | 8343 | MASTER- | C | 10 | 18.2 | 8343 | MASTER- | C | 10 | 18.1 | 8368 | MASTER- | C | 10 | 18.5 | 8368 | MASTER- | C | 10 | 18.4 | 8400 | MASTER- | C | 10 | 18.5 | 8400 | MASTER- | C | 10 | 18.1 | 8918 | MASTER-Kislovodsk | C | 180 | 14.8 | 8918 | MASTER-Kislovodsk | C | 180 | 16.5 | 9118 | MASTER-Kislovodsk | C | 180 | 16.8 | 9118 | MASTER-Kislovodsk | C | 180 | 14.9 | 9319 | MASTER-Kislovodsk | C | 180 | 17.2 | 9319 | MASTER-Kislovodsk | C | 180 | 15.1 | 9520 | MASTER-Kislovodsk | C | 180 | 16.7 | 9720 | MASTER-Kislovodsk | C | 180 | 16.7 | 9720 | MASTER-Kislovodsk | C | 180 | 12.3 | 14701 | MASTER-Kislovodsk | C | 180 | 18.2 | 14881 | MASTER-Kislovodsk | C | 540 | 18.6 | Coadd 14701 | MASTER-Kislovodsk | C | 180 | 12.3 | 14902 | MASTER-Kislovodsk | C | 180 | 17.6 | 14902 | MASTER-Kislovodsk | C | 180 | 14.2 | 15102 | MASTER-Kislovodsk | C | 180 | 18.1 | 15102 | MASTER-Kislovodsk | C | 180 | 14.8 | 15302 | MASTER-Kislovodsk | C | 180 | 17.9 | 15482 | MASTER-Kislovodsk | C | 540 | 18.8 | Coadd 15302 | MASTER-Kislovodsk | C | 180 | 15.3 | 15502 | MASTER-Kislovodsk | C | 180 | 18.1 | 15502 | MASTER-Kislovodsk | C | 180 | 15.2 | 15703 | MASTER-Kislovodsk | C | 180 | 17.8 | 15703 | MASTER-Kislovodsk | C | 180 | 15.1 | 15903 | MASTER-Kislovodsk | C | 180 | 18.3 | 15903 | MASTER-Kislovodsk | C | 180 | 15.4 | 16104 | MASTER-Kislovodsk | C | 180 | 18.4 | 16104 | MASTER-Kislovodsk | C | 180 | 15.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 4056 TYPE = 35 DAYS = 0.1 MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the INTEGRAL GRB210406.72 (trigger No 9126,08h 49m 50.12s , +76d 31m 56.6s, R=0.025) errorbox 10 sec after notice time and 2 sec after trigger time at 2021-04-06 17:11:57 UT, with upper limit up to 19.0 mag. Observations started at twilight. The observations began at zenith distance = 34 deg. The sun altitude is -16.3 deg. The galactic latitude b = 33 deg., longitude l = 137 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1585518 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 8 | MASTER-Kislovodsk | P- | 10 | 14.6 | 26 | MASTER-Kislovodsk | P- | 10 | 14.5 | 44 | MASTER-Kislovodsk | P- | 10 | 14.6 | 67 | MASTER-Kislovodsk | P- | 20 | 16.7 | 94 | MASTER-Kislovodsk | P- | 20 | 16.6 | 124 | MASTER-Kislovodsk | P- | 80 | 17.3 | Coadd 494 | MASTER-Kislovodsk | P- | 820 | 19.0 | Coadd 127 | MASTER-Kislovodsk | P- | 30 | 16.8 | 165 | MASTER-Kislovodsk | P- | 30 | 17.0 | 208 | MASTER-Kislovodsk | P- | 40 | 16.9 | 263 | MASTER-Kislovodsk | P- | 150 | 17.3 | Coadd 261 | MASTER-Kislovodsk | P- | 50 | 16.9 | 324 | MASTER-Kislovodsk | P- | 60 | 16.9 | 402 | MASTER-Kislovodsk | P- | 80 | 17.0 | 502 | MASTER-Kislovodsk | P- | 280 | 17.7 | Coadd 495 | MASTER-Kislovodsk | P- | 90 | 17.0 | 603 | MASTER-Kislovodsk | P- | 110 | 17.3 | 736 | MASTER-Kislovodsk | P- | 140 | 17.4 | 898 | MASTER-Kislovodsk | P- | 170 | 17.4 | 1081 | MASTER-Kislovodsk | P- | 180 | 17.6 | 1282 | MASTER-Kislovodsk | P- | 180 | 17.6 | 1462 | MASTER-Kislovodsk | P- | 540 | 17.7 | Coadd 1482 | MASTER-Kislovodsk | P- | 180 | 18.0 | 1683 | MASTER-Kislovodsk | P- | 180 | 15.8 | 5045 | MASTER- | C | 60 | 18.5 | 5045 | MASTER- | C | 60 | 18.5 | 5120 | MASTER- | C | 60 | 18.7 | 5120 | MASTER- | C | 60 | 18.5 | 5195 | MASTER- | C | 60 | 18.8 | 5195 | MASTER- | C | 60 | 18.5 | 5269 | MASTER- | C | 60 | 19.0 | 5269 | MASTER- | C | 60 | 18.5 | 5344 | MASTER- | C | 60 | 18.8 | 5344 | MASTER- | C | 60 | 18.6 | 5419 | MASTER- | C | 60 | 18.8 | 5419 | MASTER- | C | 60 | 18.5 | 5494 | MASTER- | C | 60 | 18.9 | 5494 | MASTER- | C | 60 | 18.5 | 5569 | MASTER- | C | 60 | 18.8 | 5569 | MASTER- | C | 60 | 18.5 | 5642 | MASTER- | C | 60 | 18.8 | 5642 | MASTER- | C | 60 | 18.5 | 5717 | MASTER- | C | 60 | 18.9 | 5717 | MASTER- | C | 60 | 18.6 | 5792 | MASTER- | C | 60 | 18.7 | 5792 | MASTER- | C | 60 | 18.4 | 5867 | MASTER- | C | 60 | 18.7 | 5867 | MASTER- | C | 60 | 18.5 | 5941 | MASTER- | C | 60 | 18.8 | 5941 | MASTER- | C | 60 | 18.5 | 6016 | MASTER- | C | 60 | 18.7 | 6016 | MASTER- | C | 60 | 18.5 | 6091 | MASTER- | C | 60 | 18.6 | 6091 | MASTER- | C | 60 | 18.5 | 6165 | MASTER- | C | 60 | 18.7 | 6165 | MASTER- | C | 60 | 18.5 | 6239 | MASTER- | C | 60 | 18.7 | 6239 | MASTER- | C | 60 | 18.5 | 6314 | MASTER- | C | 60 | 18.8 | 6314 | MASTER- | C | 60 | 18.3 | 6389 | MASTER- | C | 60 | 18.8 | 6389 | MASTER- | C | 60 | 18.5 | 6464 | MASTER- | C | 60 | 18.8 | 6464 | MASTER- | C | 60 | 18.6 | 6537 | MASTER- | C | 60 | 18.7 | 6537 | MASTER- | C | 60 | 18.6 | 6612 | MASTER- | C | 60 | 18.8 | 6612 | MASTER- | C | 60 | 18.4 | 6685 | MASTER- | C | 60 | 19.0 | 6685 | MASTER- | C | 60 | 18.6 | 6760 | MASTER- | C | 60 | 19.0 | 6760 | MASTER- | C | 60 | 18.5 | 6930 | MASTER- | C | 20 | 18.7 | 6930 | MASTER- | C | 20 | 18.5 | 7016 | MASTER-Kislovodsk | C | 180 | 17.5 | 7016 | MASTER-Kislovodsk | C | 180 | 16.2 | 6964 | MASTER- | C | 20 | 19.0 | 6965 | MASTER- | C | 20 | 18.9 | 7001 | MASTER- | C | 20 | 18.7 | 7001 | MASTER- | C | 20 | 18.6 | 7037 | MASTER- | C | 20 | 18.9 | 7037 | MASTER- | C | 20 | 18.6 | 7072 | MASTER- | C | 20 | 18.9 | 7072 | MASTER- | C | 20 | 18.4 | 7107 | MASTER- | C | 20 | 18.7 | 7107 | MASTER- | C | 20 | 18.5 | 7216 | MASTER-Kislovodsk | C | 180 | 17.2 | 7216 | MASTER-Kislovodsk | C | 180 | 15.7 | 7143 | MASTER- | C | 20 | 18.8 | 7143 | MASTER- | C | 20 | 18.6 | 7178 | MASTER- | C | 20 | 18.7 | 7178 | MASTER- | C | 20 | 18.4 | 7213 | MASTER- | C | 20 | 18.8 | 7213 | MASTER- | C | 20 | 18.5 | 7250 | MASTER- | C | 20 | 18.8 | 7250 | MASTER- | C | 20 | 18.6 | 7285 | MASTER- | C | 20 | 18.8 | 7285 | MASTER- | C | 20 | 18.5 | 7319 | MASTER- | C | 20 | 18.7 | 7319 | MASTER- | C | 20 | 18.5 | 7417 | MASTER-Kislovodsk | C | 180 | 16.3 | 7417 | MASTER-Kislovodsk | C | 180 | 15.4 | 7524 | MASTER- | C | 20 | 18.9 | 7524 | MASTER- | C | 20 | 18.8 | 7617 | MASTER-Kislovodsk | C | 180 | 16.7 | 7617 | MASTER-Kislovodsk | C | 180 | 15.0 | 7558 | MASTER- | C | 20 | 18.7 | 7558 | MASTER- | C | 20 | 18.5 | 7592 | MASTER- | C | 20 | 18.8 | 7592 | MASTER- | C | 20 | 18.5 | 7627 | MASTER- | C | 20 | 18.6 | 7627 | MASTER- | C | 20 | 18.5 | 7663 | MASTER- | C | 20 | 18.6 | 7663 | MASTER- | C | 20 | 18.4 | 7698 | MASTER- | C | 20 | 18.8 | 7698 | MASTER- | C | 20 | 18.5 | 7733 | MASTER- | C | 20 | 18.7 | 7733 | MASTER- | C | 20 | 18.5 | 7818 | MASTER-Kislovodsk | C | 180 | 16.9 | 7818 | MASTER-Kislovodsk | C | 180 | 15.7 | 7763 | MASTER- | C | 10 | 18.5 | 7763 | MASTER- | C | 10 | 18.1 | 7796 | MASTER- | C | 10 | 18.4 | 7796 | MASTER- | C | 10 | 18.2 | 7822 | MASTER- | C | 10 | 18.4 | 7822 | MASTER- | C | 10 | 18.3 | 7856 | MASTER- | C | 10 | 18.4 | 7856 | MASTER- | C | 10 | 18.2 | 7882 | MASTER- | C | 10 | 18.5 | 7882 | MASTER- | C | 10 | 18.3 | 8018 | MASTER-Kislovodsk | C | 180 | 17.4 | 8018 | MASTER-Kislovodsk | C | 180 | 16.2 | 8121 | MASTER- | C | 10 | 18.5 | 8122 | MASTER- | C | 10 | 18.1 | 8219 | MASTER-Kislovodsk | C | 180 | 17.3 | 8219 | MASTER-Kislovodsk | C | 180 | 16.2 | 8153 | MASTER- | C | 10 | 18.5 | 8153 | MASTER- | C | 10 | 18.2 | 8178 | MASTER- | C | 10 | 18.4 | 8179 | MASTER- | C | 10 | 18.1 | 8203 | MASTER- | C | 10 | 18.5 | 8203 | MASTER- | C | 10 | 18.1 | 8228 | MASTER- | C | 10 | 18.4 | 8228 | MASTER- | C | 10 | 18.1 | 8260 | MASTER- | C | 10 | 18.5 | 8260 | MASTER- | C | 10 | 18.4 | 8285 | MASTER- | C | 10 | 18.5 | 8285 | MASTER- | C | 10 | 18.1 | 8310 | MASTER- | C | 10 | 18.5 | 8311 | MASTER- | C | 10 | 18.1 | 8419 | MASTER-Kislovodsk | C | 180 | 17.0 | 8419 | MASTER-Kislovodsk | C | 180 | 16.1 | 8343 | MASTER- | C | 10 | 18.2 | 8343 | MASTER- | C | 10 | 18.1 | 8368 | MASTER- | C | 10 | 18.5 | 8368 | MASTER- | C | 10 | 18.4 | 8400 | MASTER- | C | 10 | 18.5 | 8400 | MASTER- | C | 10 | 18.1 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 4055 TYPE = 35 DAYS = 0 MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the INTEGRAL GRB210406.72 (trigger No 9126,08h 49m 46.12s , +76d 30m 59.0s, R=0.0516667) errorbox 10 sec after notice time and 28 sec after trigger time at 2021-04-06 17:11:57 UT, with upper limit up to 17.0 mag. Observations started at twilight. The observations began at zenith distance = 34 deg. The sun altitude is -16.3 deg. The galactic latitude b = 33 deg., longitude l = 137 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1585485 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 33 | MASTER-Kislovodsk | P- | 10 | 14.6 | 52 | MASTER-Kislovodsk | P- | 10 | 14.5 | 70 | MASTER-Kislovodsk | P- | 10 | 14.6 | 92 | MASTER-Kislovodsk | P- | 20 | 16.7 | 120 | MASTER-Kislovodsk | P- | 20 | 16.6 | 153 | MASTER-Kislovodsk | P- | 30 | 16.8 | 191 | MASTER-Kislovodsk | P- | 30 | 17.0 | The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 4054 TYPE = 35 DAYS = 0 MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the INTEGRAL GRB210406.72 (trigger No 9126,08h 49m 46.12s , +76d 30m 59.0s, R=0.0516667) errorbox 10 sec after notice time and 28 sec after trigger time at 2021-04-06 17:11:57 UT, with upper limit up to 17.0 mag. Observations started at twilight. The observations began at zenith distance = 34 deg. The sun altitude is -16.3 deg. The galactic latitude b = 33 deg., longitude l = 137 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1585485 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 33 | MASTER-Kislovodsk | P- | 10 | 14.6 | 52 | MASTER-Kislovodsk | P- | 10 | 14.5 | 70 | MASTER-Kislovodsk | P- | 10 | 14.6 | 92 | MASTER-Kislovodsk | P- | 20 | 16.7 | 120 | MASTER-Kislovodsk | P- | 20 | 16.6 | 153 | MASTER-Kislovodsk | P- | 30 | 16.8 | 191 | MASTER-Kislovodsk | P- | 30 | 17.0 | The observation and reduction will continue. The message may be cited. ####################################################################################### ####################################################################################### ID = 4053 TYPE = 34 DAYS = 0 MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the INTEGRAL GRB210406.72 (trigger No 9126,08h 49m 46.12s , +76d 30m 59.0s, R=0.0516667) errorbox 10 sec after notice time and 28 sec after trigger time at 2021-04-06 17:11:57 UT, with upper limit up to 17.0 mag. Observations started at twilight. The observations began at zenith distance = 34 deg. The sun altitude is -16.3 deg. The galactic latitude b = 33 deg., longitude l = 137 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1585485 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 33 | MASTER-Kislovodsk | P- | 10 | 14.6 | 52 | MASTER-Kislovodsk | P- | 10 | 14.5 | 70 | MASTER-Kislovodsk | P- | 10 | 14.6 | 92 | MASTER-Kislovodsk | P- | 20 | 16.7 | 120 | MASTER-Kislovodsk | P- | 20 | 16.6 | 153 | MASTER-Kislovodsk | P- | 30 | 16.8 | 191 | MASTER-Kislovodsk | P- | 30 | 17.0 | The observation and reduction will continue. The message may be cited.
MASTER, 2002-2024