MASTER Net MASTER Database: GRB210406.72 page

Please 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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GRB coord: ErrorBox (deg): Sys Error (deg):
Sattel : Trigger: Notice:
GRB_Name: trignum: Nights after: FullSky


Name INTEGRAL GRB210406.72
Trignum 9126
Trigger time 2021-04-06 17:11:54.66
Notice time 2021-04-06 17:46:48.14013
Coord, eb (08h 49m 50.12s , +76d 31m 56.6s) , 0.025
Max dist: 1 sigma 3 sigma
AGN candidates: Milliquas
r90wise
wiseXgaia
BL Lac candidates: 1 Sigma
3 Sigma

MASTER observatories and transients from them in error-field
Kislovodsk Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Amur Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tunka Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAFA Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
IAC Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
SAAO Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tavrida Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAGH Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)

All alerts for this trigger
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

DAYS:

MASTER optical transients in this field
Will be published in GCN, ATEL

Synchronous WFC images
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
43.8 2021-04-06 17:11:48.079 16h 01m 29.00s +51d 58m 59.0s Tunka 100628 Database Tunka
46.0 2021-04-06 17:09:52.91 15h 32m 29.00s +48d 01m 00.0s Tunka 100629 Database Tunka
32.5 2021-04-06 17:10:56.587 10h 15m 15.00s +45d 13m 02.0s Kislovodsk 111339 Database Kislovodsk
73.0 2021-04-06 17:11:49.682 05h 55m 07.00s +07d 25m 24.0s SAAO 111341 Database SAAO
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-04-06 17:11:54 (JD 2459311.216597)

Siderial time 8.720333 h

Ra 08:49:50.12 Dec 76:31:56.60
(132.458833d, 76.532389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 48.86 Azimuth: 159.28

Sun: Altitude: -29.04 Azimuth: 208.89

Moon: Altitude: -20.96 Azimuth: 277.45

Tunka

Object: Altitude: 55.89 Azimuth: 158.12

Sun: Altitude: -31.57 Azimuth: 180.87

Moon: Altitude: -36.15 Azimuth: 257.15

Kislovodsk

Object: Altitude: 57.19 Azimuth: 178.60

Sun: Altitude: -16.34 Azimuth: 116.54

Moon: Altitude: -66.74 Azimuth: 172.24

Tavrida

Object: Altitude: 58.12 Azimuth: 182.31

Sun: Altitude: -10.36 Azimuth: 110.24

Moon: Altitude: -64.03 Azimuth: 154.16

SAAO

Object: Altitude: -19.53 Azimuth: 184.49

Sun: Altitude: -10.69 Azimuth: 91.09

Moon: Altitude: -31.84 Azimuth: 27.72

IAC

Object: Altitude: 35.20 Azimuth: 193.63

Sun: Altitude: 28.45 Azimuth: 81.78

Moon: Altitude: -33.38 Azimuth: 82.83

Argentina

Object: Altitude: -35.14 Azimuth: 195.66

Sun: Altitude: 50.77 Azimuth: 166.81

Moon: Altitude: 31.56 Azimuth: 83.91

Mexico

Object: Altitude: 19.24 Azimuth: 187.16

Sun: Altitude: 50.85 Azimuth: 301.78

Moon: Altitude: 33.46 Azimuth: 26.95

Ural

Object: Altitude: 69.20 Azimuth: 166.87

Sun: Altitude: -17.46 Azimuth: 134.99

Moon: Altitude: -52.23 Azimuth: 201.30

Vostryakovo

Object: Altitude: 68.84 Azimuth: 180.94

Sun: Altitude: -8.52 Azimuth: 114.95

Moon: Altitude: -54.75 Azimuth: 166.99

Gal. latitude: 33.475560 Gal. longitude: 136.962880

Dist. to Sun: 89.591540

Dist. to Moon: 124.019459

Moon coord.: (318.974437 d, -20.649209 d)

Sun coord.: (15.504893 d, 6.612786 d)

Lunar disk: 0.265115

Lunar phase: 118.019332

Lunar bright limb: 70.037749

No SN in this field

2021-04-06 17:46:48 (JD 2459311.240833)

Siderial time 9.303592 h

Ra 08:49:50.12 Dec 76:31:56.60
(132.458833d, 76.532389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 46.92 Azimuth: 160.22

Sun: Altitude: -25.96 Azimuth: 218.03

Moon: Altitude: -15.61 Azimuth: 283.56

Tunka

Object: Altitude: 53.86 Azimuth: 157.87

Sun: Altitude: -31.01 Azimuth: 191.00

Moon: Altitude: -30.95 Azimuth: 264.27

Kislovodsk

Object: Altitude: 56.83 Azimuth: 174.92

Sun: Altitude: -21.79 Azimuth: 123.68

Moon: Altitude: -66.42 Azimuth: 192.16

Tavrida

Object: Altitude: 58.16 Azimuth: 178.46

Sun: Altitude: -16.03 Azimuth: 116.97

Moon: Altitude: -65.68 Azimuth: 172.38

SAAO

Object: Altitude: -19.08 Azimuth: 182.38

Sun: Altitude: -18.06 Azimuth: 86.38

Moon: Altitude: -34.74 Azimuth: 18.94

IAC

Object: Altitude: 36.93 Azimuth: 192.31

Sun: Altitude: 20.81 Azimuth: 86.30

Moon: Altitude: -40.74 Azimuth: 86.40

Argentina

Object: Altitude: -33.12 Azimuth: 195.90

Sun: Altitude: 48.26 Azimuth: 154.01

Moon: Altitude: 24.43 Azimuth: 80.08

Mexico

Object: Altitude: 20.29 Azimuth: 189.01

Sun: Altitude: 56.83 Azimuth: 312.46

Moon: Altitude: 29.81 Azimuth: 35.16

Ural

Object: Altitude: 67.93 Azimuth: 162.50

Sun: Altitude: -20.55 Azimuth: 143.56

Moon: Altitude: -50.04 Azimuth: 213.39

Vostryakovo

Object: Altitude: 68.68 Azimuth: 175.34

Sun: Altitude: -12.85 Azimuth: 122.60

Moon: Altitude: -55.18 Azimuth: 180.73

Gal. latitude: 33.475560 Gal. longitude: 136.962880

Dist. to Sun: 89.578025

Dist. to Moon: 123.927105

Moon coord.: (319.297703 d, -20.566692 d)

Sun coord.: (15.527066 d, 6.621928 d)

Lunar disk: 0.262891

Lunar phase: 118.308472

Lunar bright limb: 69.912363

No SN in this field

2021-04-06 18:46:48 (JD 2459311.282500)

Siderial time 10.306330 h

Ra 08:49:50.12 Dec 76:31:56.60
(132.458833d, 76.532389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 43.85 Azimuth: 162.58

Sun: Altitude: -19.15 Azimuth: 232.40

Moon: Altitude: -6.76 Azimuth: 294.05

Tunka

Object: Altitude: 50.39 Azimuth: 158.59

Sun: Altitude: -27.91 Azimuth: 207.76

Moon: Altitude: -21.90 Azimuth: 275.58

Kislovodsk

Object: Altitude: 55.32 Azimuth: 169.28

Sun: Altitude: -30.01 Azimuth: 137.52

Moon: Altitude: -61.51 Azimuth: 221.34

Tavrida

Object: Altitude: 57.28 Azimuth: 172.13

Sun: Altitude: -24.92 Azimuth: 129.77

Moon: Altitude: -64.00 Azimuth: 204.40

SAAO

Object: Altitude: -18.96 Azimuth: 178.69

Sun: Altitude: -30.61 Azimuth: 77.52

Moon: Altitude: -37.16 Azimuth: 2.43

IAC

Object: Altitude: 39.42 Azimuth: 189.19

Sun: Altitude: 7.62 Azimuth: 93.47

Moon: Altitude: -53.43 Azimuth: 93.48

Argentina

Object: Altitude: -29.64 Azimuth: 195.48

Sun: Altitude: 40.87 Azimuth: 135.76

Moon: Altitude: 12.39 Azimuth: 73.49

Mexico

Object: Altitude: 22.63 Azimuth: 191.80

Sun: Altitude: 64.18 Azimuth: 339.16

Moon: Altitude: 21.73 Azimuth: 47.28

Ural

Object: Altitude: 65.10 Azimuth: 157.38

Sun: Altitude: -24.45 Azimuth: 159.14

Moon: Altitude: -44.57 Azimuth: 231.77

Vostryakovo

Object: Altitude: 67.33 Azimuth: 166.73

Sun: Altitude: -19.40 Azimuth: 136.54

Moon: Altitude: -53.28 Azimuth: 203.82

Gal. latitude: 33.475560 Gal. longitude: 136.962880

Dist. to Sun: 89.554789

Dist. to Moon: 123.765979

Moon coord.: (319.852271 d, -20.423525 d)

Sun coord.: (15.565186 d, 6.637642 d)

Lunar disk: 0.259083

Lunar phase: 118.805205

Lunar bright limb: 69.697827

No SN in this field

2024-10-05 09:23:28 (JD 2460588.891296)

Siderial time 12.868891 h

Ra 08:49:50.12 Dec 76:31:56.60
(132.458833d, 76.532389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 38.25 Azimuth: 171.59

Sun: Altitude: -4.76 Azimuth: 88.12

Moon: Altitude: 0.81 Azimuth: 60.25

Tunka

Object: Altitude: 42.82 Azimuth: 165.12

Sun: Altitude: 9.93 Azimuth: 68.81

Moon: Altitude: 11.62 Azimuth: 39.95

Kislovodsk

Object: Altitude: 47.93 Azimuth: 161.57

Sun: Altitude: 41.03 Azimuth: 8.78

Moon: Altitude: 25.98 Azimuth: 339.62

Tavrida

Object: Altitude: 50.77 Azimuth: 162.02

Sun: Altitude: 40.38 Azimuth: 357.55

Moon: Altitude: 22.55 Azimuth: 331.36

SAAO

Object: Altitude: -22.26 Azimuth: 169.98

Sun: Altitude: 59.08 Azimuth: 210.29

Moon: Altitude: 50.48 Azimuth: 258.49

IAC

Object: Altitude: 41.67 Azimuth: 177.99

Sun: Altitude: 29.68 Azimuth: 294.68

Moon: Altitude: 1.48 Azimuth: 291.19

Argentina

Object: Altitude: -22.08 Azimuth: 190.48

Sun: Altitude: -10.23 Azimuth: 282.31

Moon: Altitude: -21.72 Azimuth: 309.39

Mexico

Object: Altitude: 30.70 Azimuth: 195.70

Sun: Altitude: -48.91 Azimuth: 237.32

Moon: Altitude: -74.95 Azimuth: 210.23

Ural

Object: Altitude: 56.36 Azimuth: 155.37

Sun: Altitude: 25.18 Azimuth: 26.22

Moon: Altitude: 15.13 Azimuth: 357.85

Vostryakovo

Object: Altitude: 59.88 Azimuth: 156.11

Sun: Altitude: 29.74 Azimuth: 2.21

Moon: Altitude: 14.04 Azimuth: 336.56

Gal. latitude: 33.475560 Gal. longitude: 136.962880

Dist. to Sun: 87.840526

Dist. to Moon: 106.078575

Moon coord.: (217.138064 d, -17.814075 d)

Sun coord.: (191.303213 d, -4.859184 d)

Lunar disk: 0.060385

Lunar phase: 151.549703

Lunar bright limb: 294.042320

No SN in this field
Recent coverage and limits telegrams

 #######################################################################################
#######################################################################################

  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