MASTER Net MASTER Database: GRB211218.04 page

Please use the reference to MASTER DataBase as Lipunov et al., 2010, MASTER Robotic Net, Advances in Astronomy, vol. 2010, p.30L

MASTER WFC:
Raw | Processing | Search
Single sets | Single images
SN | Asteroid | Transient | Comet

MASTER II:
Raw | Processing | Search by orbit elements | Search
SN | Asteroid | Transient | Two tube | Short transient | Tr. difference | Comet | Nova M31 | GRB | GRB_HPX | LIGO
Manual control | Planner | Planner Results | Planner NET

General:
SN list | Sky map | Add asteroid
Meteo | Focus | MASTER page
Users list | Users statistic | Logout

Search:

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


Name MAXI GRB211218.04
Trignum 566013095
Trigger time 2021-12-18 01:01:34
Notice time 2021-12-18 03:18:16.454061
Coord, eb (09h 09m 06.72s , -04d 06m 36.0s) , 1
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)

You are viewing outdated information, relevant error box is here

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
1818330 2021-12-18 07:22:17.053169 09h 09m 06.72s -04d 06m 36.0s MAXI 1 alert 566013095 2 134 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
51.5 2021-12-18 00:59:21.681 05h 43m 54.00s -14d 19m 41.0s IAC 100627 Database IAC
51.5 2021-12-18 01:00:03.166 05h 43m 54.00s -14d 19m 41.0s IAC 111343 Database IAC
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-12-18 01:01:34 (JD 2459566.542755)

Siderial time 9.325548 h

Ra 09:09:06.72 Dec -4:06:36.00
(137.278000d, -4.110000d)

Rise 2021-12-18 19:08:20

Transit 2021-12-18 00:51:11

Set 2021-12-18 06:30:04

Amur

Object: Altitude: -4.74 Azimuth: 89.27

Sun: Altitude: 9.74 Azimuth: 326.90

Moon: Altitude: -13.54 Azimuth: 159.01

Tunka

Object: Altitude: 10.03 Azimuth: 69.97

Sun: Altitude: -1.77 Azimuth: 307.08

Moon: Altitude: -4.28 Azimuth: 137.97

Kislovodsk

Object: Altitude: 41.67 Azimuth: 10.05

Sun: Altitude: -37.92 Azimuth: 267.18

Moon: Altitude: 28.22 Azimuth: 96.53

Tavrida

Object: Altitude: 41.15 Azimuth: 358.68

Sun: Altitude: -43.86 Azimuth: 259.79

Moon: Altitude: 34.36 Azimuth: 90.21

SAAO

Object: Altitude: 58.76 Azimuth: 208.15

Sun: Altitude: -23.77 Azimuth: 322.45

Moon: Altitude: 15.86 Azimuth: 132.20

IAC

Object: Altitude: 30.83 Azimuth: 294.59

Sun: Altitude: -85.08 Azimuth: 181.10

Moon: Altitude: 76.81 Azimuth: 71.95

Argentina

Object: Altitude: -9.91 Azimuth: 281.19

Sun: Altitude: -15.27 Azimuth: 49.20

Moon: Altitude: 23.20 Azimuth: 219.01

Mexico

Object: Altitude: -47.76 Azimuth: 237.41

Sun: Altitude: -8.80 Azimuth: 67.94

Moon: Altitude: 19.87 Azimuth: 253.86

Ural

Object: Altitude: 25.70 Azimuth: 27.36

Sun: Altitude: -26.91 Azimuth: 272.04

Moon: Altitude: 19.71 Azimuth: 103.12

Vostryakovo

Object: Altitude: 30.46 Azimuth: 3.24

Sun: Altitude: -39.05 Azimuth: 254.01

Moon: Altitude: 31.58 Azimuth: 86.25

Gal. latitude: 28.378338 Gal. longitude: 234.824956

Dist. to Sun: 122.675922

Dist. to Moon: 69.217840

Moon coord.: (72.068957 d, 23.536363 d)

Sun coord.: (265.651988 d, -23.385039 d)

Lunar disk: 0.988287

Lunar phase: 12.426446

Lunar bright limb: 267.545031

No SN in this field

2021-12-18 03:18:16 (JD 2459566.637685)

Siderial time 11.610119 h

Ra 09:09:06.72 Dec -4:06:36.00
(137.278000d, -4.110000d)

Rise 2021-12-18 19:08:20

Transit 2021-12-18 00:51:11

Set 2021-12-18 06:30:04

Amur

Object: Altitude: -25.86 Azimuth: 117.35

Sun: Altitude: 16.28 Azimuth: 358.34

Moon: Altitude: -15.30 Azimuth: 190.19

Tunka

Object: Altitude: -10.83 Azimuth: 97.19

Sun: Altitude: 11.38 Azimuth: 335.62

Moon: Altitude: -13.48 Azimuth: 167.15

Kislovodsk

Object: Altitude: 29.19 Azimuth: 49.57

Sun: Altitude: -13.67 Azimuth: 289.43

Moon: Altitude: 5.67 Azimuth: 117.75

Tavrida

Object: Altitude: 32.82 Azimuth: 40.63

Sun: Altitude: -19.79 Azimuth: 283.73

Moon: Altitude: 11.61 Azimuth: 112.06

SAAO

Object: Altitude: 56.06 Azimuth: 142.20

Sun: Altitude: -1.85 Azimuth: 299.39

Moon: Altitude: -7.82 Azimuth: 113.24

IAC

Object: Altitude: 53.58 Azimuth: 330.11

Sun: Altitude: -58.88 Azimuth: 268.88

Moon: Altitude: 48.00 Azimuth: 94.94

Argentina

Object: Altitude: 19.07 Azimuth: 262.81

Sun: Altitude: -32.03 Azimuth: 20.15

Moon: Altitude: 34.13 Azimuth: 186.71

Mexico

Object: Altitude: -20.18 Azimuth: 262.40

Sun: Altitude: -37.05 Azimuth: 82.76

Moon: Altitude: 47.85 Azimuth: 267.95

Ural

Object: Altitude: 12.77 Azimuth: 61.02

Sun: Altitude: -9.19 Azimuth: 299.32

Moon: Altitude: 3.92 Azimuth: 129.55

Vostryakovo

Object: Altitude: 23.15 Azimuth: 40.83

Sun: Altitude: -19.85 Azimuth: 282.71

Moon: Altitude: 13.40 Azimuth: 112.59

Gal. latitude: 28.378338 Gal. longitude: 234.824956

Dist. to Sun: 122.764512

Dist. to Moon: 68.213467

Moon coord.: (73.269555 d, 23.768550 d)

Sun coord.: (265.757162 d, -23.387920 d)

Lunar disk: 0.990100

Lunar phase: 11.420768

Lunar bright limb: 268.912355

No SN in this field

2021-12-18 04:18:16 (JD 2459566.679352)

Siderial time 12.612857 h

Ra 09:09:06.72 Dec -4:06:36.00
(137.278000d, -4.110000d)

Rise 2021-12-18 19:08:20

Transit 2021-12-18 00:51:11

Set 2021-12-18 06:30:04

Amur

Object: Altitude: -33.75 Azimuth: 132.09

Sun: Altitude: 15.36 Azimuth: 12.61

Moon: Altitude: -12.51 Azimuth: 203.56

Tunka

Object: Altitude: -19.86 Azimuth: 109.63

Sun: Altitude: 14.17 Azimuth: 349.44

Moon: Altitude: -14.32 Azimuth: 180.80

Kislovodsk

Object: Altitude: 20.17 Azimuth: 62.79

Sun: Altitude: -3.80 Azimuth: 299.15

Moon: Altitude: -3.07 Azimuth: 127.75

Tavrida

Object: Altitude: 24.89 Azimuth: 55.20

Sun: Altitude: -9.70 Azimuth: 293.42

Moon: Altitude: 2.50 Azimuth: 121.80

SAAO

Object: Altitude: 46.68 Azimuth: 123.28

Sun: Altitude: 9.58 Azimuth: 291.70

Moon: Altitude: -19.39 Azimuth: 106.54

IAC

Object: Altitude: 57.52 Azimuth: 355.89

Sun: Altitude: -45.69 Azimuth: 275.39

Moon: Altitude: 35.37 Azimuth: 100.45

Argentina

Object: Altitude: 31.58 Azimuth: 253.61

Sun: Altitude: -34.70 Azimuth: 3.97

Moon: Altitude: 33.75 Azimuth: 170.70

Mexico

Object: Altitude: -7.33 Azimuth: 270.39

Sun: Altitude: -49.86 Azimuth: 89.73

Moon: Altitude: 60.30 Azimuth: 275.88

Ural

Object: Altitude: 5.22 Azimuth: 74.15

Sun: Altitude: -2.54 Azimuth: 311.44

Moon: Altitude: -1.51 Azimuth: 141.67

Vostryakovo

Object: Altitude: 16.80 Azimuth: 55.31

Sun: Altitude: -11.79 Azimuth: 294.30

Moon: Altitude: 6.24 Azimuth: 123.93

Gal. latitude: 28.378338 Gal. longitude: 234.824956

Dist. to Sun: 122.803391

Dist. to Moon: 67.773157

Moon coord.: (73.797890 d, 23.867528 d)

Sun coord.: (265.803327 d, -23.389161 d)

Lunar disk: 0.990846

Lunar phase: 10.980441

Lunar bright limb: 269.566212

No SN in this field

2025-01-02 20:32:28 (JD 2460678.355880)

Siderial time 5.897593 h

Ra 09:09:06.72 Dec -4:06:36.00
(137.278000d, -4.110000d)

Rise 2025-01-03 18:04:21

Transit 2025-01-03 23:43:15

Set 2025-01-03 05:26:05

Amur

Object: Altitude: 25.16 Azimuth: 46.36

Sun: Altitude: -26.90 Azimuth: 274.07

Moon: Altitude: -47.10 Azimuth: 235.04

Tunka

Object: Altitude: 32.31 Azimuth: 19.75

Sun: Altitude: -41.91 Azimuth: 252.76

Moon: Altitude: -55.32 Azimuth: 199.56

Kislovodsk

Object: Altitude: 28.01 Azimuth: 308.42

Sun: Altitude: -67.54 Azimuth: 155.07

Moon: Altitude: -41.90 Azimuth: 105.87

Tavrida

Object: Altitude: 22.44 Azimuth: 301.22

Sun: Altitude: -63.38 Azimuth: 139.08

Moon: Altitude: -35.74 Azimuth: 99.61

SAAO

Object: Altitude: 22.71 Azimuth: 260.01

Sun: Altitude: -26.96 Azimuth: 32.98

Moon: Altitude: -5.55 Azimuth: 64.15

IAC

Object: Altitude: -13.34 Azimuth: 267.48

Sun: Altitude: -28.27 Azimuth: 77.78

Moon: Altitude: 6.26 Azimuth: 65.25

Argentina

Object: Altitude: -47.32 Azimuth: 322.83

Sun: Altitude: 38.23 Azimuth: 84.62

Moon: Altitude: 68.09 Azimuth: 123.31

Mexico

Object: Altitude: -58.75 Azimuth: 146.20

Sun: Altitude: 33.66 Azimuth: 18.91

Moon: Altitude: 36.32 Azimuth: 333.97

Ural

Object: Altitude: 25.08 Azimuth: 330.13

Sun: Altitude: -55.46 Azimuth: 191.34

Moon: Altitude: -44.61 Azimuth: 135.13

Vostryakovo

Object: Altitude: 18.40 Azimuth: 307.93

Sun: Altitude: -55.69 Azimuth: 155.35

Moon: Altitude: -35.34 Azimuth: 110.36

Gal. latitude: 28.378338 Gal. longitude: 234.824956

Dist. to Sun: 137.345110

Dist. to Moon: 156.996923

Moon coord.: (322.335758 d, -18.346453 d)

Sun coord.: (283.435948 d, -22.871867 d)

Lunar disk: 0.099013

Lunar phase: 143.319065

Lunar bright limb: 256.005860

No SN in this field
Recent coverage and limits telegrams

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

  ID = 5423
TYPE = 35
DAYS = 1


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB211218.04 (trigger No 566013095,09h 09m 06.72s , -04d 06m 36.0s, R=1) errorbox 8135 sec after trigger time at 2021-12-18 03:17:09 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -32.8 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB211218.04 errorbox  19 sec after notice time and 8221 sec after trigger time at 2021-12-18 03:18:35 UT, with upper limit up to  18.9 mag. The observations began at zenith distance = 36 deg. The sun  altitude  is -58.4 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the MAXI GRB211218.04 errorbox  62412 sec after notice time and 70615 sec after trigger time at 2021-12-18 20:38:29 UT, with upper limit up to  17.3 mag. The observations began at zenith distance = 75 deg. The sun  altitude  is -65.9 deg. 

The galactic latitude b = 28 deg., longitude l = 235 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1818321

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    8226 | 2021-12-18 03:17:09 |         MASTER-OAFA | (09h 08m 40.94s , -04d 42m 54.3s) |   C |   180 | 17.1 |        
    8312 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   180 | 17.3 |        
    8492 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   540 | 18.3 |  Coadd 
    8425 | 2021-12-18 03:20:29 |         MASTER-OAFA | (09h 08m 38.08s , -04d 41m 08.9s) |   C |   180 | 17.2 |        
    8512 | 2021-12-18 03:21:55 |          MASTER-IAC | (09h 07m 37.32s , -03d 56m 10.9s) |  P- |   180 | 17.5 |        
    8624 | 2021-12-18 03:23:48 |         MASTER-OAFA | (09h 08m 38.25s , -04d 42m 58.1s) |   C |   180 | 17.4 |        
    8712 | 2021-12-18 03:25:15 |          MASTER-IAC | (09h 07m 41.99s , -03d 57m 13.3s) |  P- |   180 | 17.6 |        
    8824 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   180 | 17.6 |        
    9004 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   540 | 18.3 |  Coadd 
    8912 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   180 | 17.6 |        
    9092 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   540 | 18.9 |  Coadd 
    9029 | 2021-12-18 03:30:32 |         MASTER-OAFA | (09h 08m 36.24s , -04d 42m 01.0s) |   C |   180 | 17.6 |        
    9228 | 2021-12-18 03:33:52 |         MASTER-OAFA | (09h 08m 35.95s , -04d 41m 00.3s) |   C |   180 | 17.7 |        
    9216 | 2021-12-18 03:34:39 |          MASTER-IAC | (09h 03m 45.12s , -04d 22m 19.5s) |   C |    60 | 17.9 |        
    9297 | 2021-12-18 03:36:01 |          MASTER-IAC | (09h 02m 40.36s , -02d 26m 41.7s) |   C |    60 | 17.5 |        
    9843 | 2021-12-18 03:44:06 |          MASTER-IAC | (09h 07m 40.85s , -03d 56m 48.4s) |   C |   180 | 18.4 |        
   10043 | 2021-12-18 03:47:26 |          MASTER-IAC | (09h 07m 34.50s , -03d 57m 52.7s) |   C |   180 | 18.5 |        
   10782 | 2021-12-18 04:00:46 |          MASTER-IAC | (09h 03m 47.47s , -04d 21m 06.6s) |   C |    60 | 18.0 |        
   10867 | 2021-12-18 04:02:10 |          MASTER-IAC | (09h 02m 33.04s , -02d 27m 43.5s) |   C |    60 | 17.6 |        
   11488 | 2021-12-18 04:11:32 |         MASTER-OAFA | (09h 08m 39.32s , -04d 41m 33.4s) |   C |   180 | 17.8 |        
   11688 | 2021-12-18 04:14:52 |         MASTER-OAFA | (09h 08m 39.60s , -04d 42m 35.8s) |   C |   180 | 18.1 |        
   11807 | 2021-12-18 04:16:50 |          MASTER-IAC | (09h 07m 33.75s , -03d 56m 00.3s) |   C |   180 | 18.5 |        
   12007 | 2021-12-18 04:20:10 |          MASTER-IAC | (09h 07m 33.67s , -03d 57m 23.8s) |   C |   180 | 18.5 |        
   12347 | 2021-12-18 04:26:50 |          MASTER-IAC | (09h 03m 40.77s , -04d 21m 55.8s) |   C |    60 | 18.0 |        
   12427 | 2021-12-18 04:28:10 |          MASTER-IAC | (09h 02m 32.18s , -02d 26m 54.8s) |   C |    60 | 17.7 |        
   12768 | 2021-12-18 04:32:51 |          MASTER-IAC | (09h 03m 55.06s , -03d 59m 35.6s) |   C |   180 | 18.5 |        
   12947 | 2021-12-18 04:36:51 |         MASTER-OAFA | (09h 04m 28.00s , -03d 41m 00.9s) |   C |    60 | 17.6 |        
   13027 | 2021-12-18 04:38:10 |         MASTER-OAFA | (09h 12m 23.04s , -03d 41m 47.9s) |   C |    60 | 17.7 |        
   13106 | 2021-12-18 04:39:30 |         MASTER-OAFA | (09h 03m 21.35s , -01d 47m 52.1s) |   C |    60 | 17.3 |        
   13186 | 2021-12-18 04:40:49 |         MASTER-OAFA | (09h 11m 14.49s , -01d 48m 42.1s) |   C |    60 | 17.6 |        
   13768 | 2021-12-18 04:49:31 |          MASTER-IAC | (09h 07m 33.44s , -03d 58m 13.5s) |   C |   180 | 18.5 |        
   13968 | 2021-12-18 04:52:52 |          MASTER-IAC | (09h 07m 40.14s , -03d 58m 04.3s) |   C |   180 | 18.5 |        
   14000 | 2021-12-18 04:54:24 |         MASTER-OAFA | (09h 04m 29.64s , -03d 42m 02.2s) |   C |    60 | 17.7 |        
   14080 | 2021-12-18 04:55:43 |         MASTER-OAFA | (09h 12m 25.06s , -03d 42m 49.9s) |   C |    60 | 17.8 |        
   14168 | 2021-12-18 04:56:12 |          MASTER-IAC | (09h 03m 56.46s , -03d 57m 43.5s) |   C |   180 | 18.5 |        
   14160 | 2021-12-18 04:57:03 |         MASTER-OAFA | (09h 03m 23.12s , -01d 48m 30.6s) |   C |    60 | 17.4 |        
   14239 | 2021-12-18 04:58:22 |         MASTER-OAFA | (09h 11m 19.66s , -01d 46m 46.7s) |   C |    60 | 17.6 |        
   14974 | 2021-12-18 05:09:38 |          MASTER-IAC | (09h 03m 58.90s , -03d 59m 18.7s) |   C |   180 | 18.5 |        
   14976 | 2021-12-18 05:10:39 |         MASTER-OAFA | (09h 04m 27.20s , -03d 43m 04.5s) |   C |    60 | 17.7 |        
   15055 | 2021-12-18 05:11:58 |         MASTER-OAFA | (09h 12m 30.67s , -03d 40m 55.4s) |   C |    60 | 17.7 |        
   15134 | 2021-12-18 05:13:18 |         MASTER-OAFA | (09h 03m 16.13s , -01d 48m 00.2s) |   C |    60 | 17.4 |        
   15214 | 2021-12-18 05:14:37 |         MASTER-OAFA | (09h 11m 17.09s , -01d 46m 47.4s) |   C |    60 | 17.6 |        
   16330 | 2021-12-18 05:32:13 |         MASTER-OAFA | (09h 08m 38.57s , -03d 18m 39.9s) |   C |   180 | 18.0 |        
   16529 | 2021-12-18 05:35:33 |         MASTER-OAFA | (09h 08m 39.25s , -03d 17m 35.0s) |   C |   180 | 18.3 |        
   16729 | 2021-12-18 05:38:52 |         MASTER-OAFA | (09h 08m 45.18s , -03d 18m 32.6s) |   C |   180 | 18.3 |        
   17745 | 2021-12-18 05:55:49 |         MASTER-OAFA | (09h 08m 37.62s , -03d 18m 44.4s) |   C |   180 | 18.3 |        
   18832 | 2021-12-18 06:13:55 |         MASTER-OAFA | (09h 08m 40.02s , -03d 18m 12.9s) |   C |   180 | 18.3 |        
   19632 | 2021-12-18 06:27:15 |          MASTER-IAC | (09h 08m 21.41s , -04d 03m 29.7s) |   C |   180 | 18.4 |        
   19632 | 2021-12-18 06:27:15 |          MASTER-IAC | (09h 07m 26.01s , -03d 56m 50.7s) |   C |   180 | 18.2 |        
   19915 | 2021-12-18 06:31:59 |          MASTER-IAC | (09h 08m 26.96s , -04d 03m 32.6s) |   C |   180 | 18.6 |        
   19915 | 2021-12-18 06:31:59 |          MASTER-IAC | (09h 07m 31.72s , -03d 56m 57.7s) |   C |   180 | 18.3 |        
   21496 | 2021-12-18 06:58:20 |          MASTER-IAC | (09h 08m 25.26s , -04d 04m 26.1s) |   C |   180 | 18.1 |        
   21496 | 2021-12-18 06:58:20 |          MASTER-IAC | (09h 07m 31.81s , -03d 58m 03.5s) |   C |   180 | 17.6 |        
   21784 | 2021-12-18 07:03:07 |          MASTER-IAC | (09h 08m 22.46s , -04d 04m 35.1s) |   C |   180 | 17.6 |        
   21784 | 2021-12-18 07:03:07 |          MASTER-IAC | (09h 07m 29.17s , -03d 58m 14.4s) |   C |   180 | 17.2 |        
   22239 | 2021-12-18 07:10:42 |         MASTER-OAFA | (09h 08m 36.63s , -03d 18m 40.7s) |   C |   180 | 18.5 |        
   22419 | 2021-12-18 07:10:42 |         MASTER-OAFA | (09h 08m 36.63s , -03d 18m 40.8s) |   C |   540 | 19.2 |  Coadd 
   22439 | 2021-12-18 07:14:02 |         MASTER-OAFA | (09h 08m 36.67s , -03d 19m 57.3s) |   C |   180 | 18.5 |        
   22859 | 2021-12-18 07:21:03 |         MASTER-OAFA | (09h 08m 32.55s , -03d 18m 18.6s) |   C |   180 | 18.6 |        
   23059 | 2021-12-18 07:24:22 |         MASTER-OAFA | (09h 08m 37.74s , -03d 19m 18.8s) |   C |   180 | 18.5 |        
   23239 | 2021-12-18 07:24:22 |         MASTER-OAFA | (09h 08m 37.74s , -03d 19m 18.8s) |   C |   540 | 19.2 |  Coadd 
   23290 | 2021-12-18 07:28:14 |         MASTER-OAFA | (09h 08m 32.08s , -03d 20m 18.6s) |   C |   180 | 18.5 |        
   23490 | 2021-12-18 07:31:33 |         MASTER-OAFA | (09h 08m 38.92s , -03d 19m 51.5s) |   C |   180 | 18.5 |        
   24073 | 2021-12-18 07:41:16 |         MASTER-OAFA | (09h 08m 36.42s , -04d 42m 28.4s) |   C |   180 | 18.4 |        
   24273 | 2021-12-18 07:44:36 |         MASTER-OAFA | (09h 08m 36.65s , -04d 41m 22.8s) |   C |   180 | 18.6 |        
   25901 | 2021-12-18 08:11:44 |         MASTER-OAFA | (09h 08m 41.74s , -04d 43m 23.9s) |   C |   180 | 18.6 |        
   26100 | 2021-12-18 08:15:04 |         MASTER-OAFA | (09h 08m 38.87s , -04d 42m 01.0s) |   C |   180 | 18.6 |        
   70645 | 2021-12-18 20:38:29 |      MASTER-Tavrida | (09h 02m 13.95s , -04d 07m 44.9s) |   C |    60 | 16.9 |        
   70724 | 2021-12-18 20:39:48 |      MASTER-Tavrida | (09h 10m 08.14s , -04d 08m 48.1s) |   C |    60 | 16.7 |        
   70803 | 2021-12-18 20:41:07 |      MASTER-Tavrida | (09h 01m 03.25s , -02d 12m 53.5s) |   C |    60 | 16.6 |        
   70882 | 2021-12-18 20:42:26 |      MASTER-Tavrida | (09h 09m 03.83s , -02d 14m 47.5s) |   C |    60 | 16.6 |        
   71588 | 2021-12-18 20:53:12 |      MASTER-Tavrida | (09h 02m 37.35s , -03d 44m 50.0s) |   C |   180 | 17.0 |        
   71841 | 2021-12-18 20:58:24 |      MASTER-Tavrida | (09h 02m 12.77s , -04d 07m 47.8s) |   C |    60 | 16.9 |        
   72542 | 2021-12-18 21:10:05 |      MASTER-Tavrida | (09h 10m 10.88s , -04d 07m 56.7s) |   C |    60 | 16.9 |        
   72621 | 2021-12-18 21:11:24 |      MASTER-Tavrida | (09h 01m 08.11s , -02d 13m 49.3s) |   C |    60 | 16.6 |        
   72700 | 2021-12-18 21:12:44 |      MASTER-Tavrida | (09h 09m 05.46s , -02d 12m 09.4s) |   C |    60 | 16.9 |        
   72945 | 2021-12-18 21:15:49 |      MASTER-Tavrida | (09h 02m 32.17s , -03d 42m 58.9s) |   C |   180 | 17.3 |        
   73507 | 2021-12-18 21:26:11 |      MASTER-Tavrida | (09h 02m 15.44s , -04d 07m 02.9s) |   C |    60 | 17.2 |        
   73744 | 2021-12-18 21:30:08 |      MASTER-Tavrida | (09h 10m 13.20s , -04d 07m 13.0s) |   C |    60 | 17.3 |        
   73976 | 2021-12-18 21:34:00 |      MASTER-Tavrida | (09h 08m 59.88s , -02d 12m 04.3s) |   C |    60 | 16.9 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



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

  ID = 5421
TYPE = 35
DAYS = 0.5


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB211218.04 (trigger No 566013095,09h 09m 06.72s , -04d 06m 36.0s, R=1) errorbox 8135 sec after trigger time at 2021-12-18 03:17:09 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -32.8 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB211218.04 errorbox  19 sec after notice time and 8221 sec after trigger time at 2021-12-18 03:18:35 UT, with upper limit up to  18.9 mag. The observations began at zenith distance = 36 deg. The sun  altitude  is -58.4 deg. 

The galactic latitude b = 28 deg., longitude l = 235 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1818321

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    8226 | 2021-12-18 03:17:09 |         MASTER-OAFA | (09h 08m 40.94s , -04d 42m 54.3s) |   C |   180 | 17.1 |        
    8312 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   180 | 17.3 |        
    8492 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   540 | 18.3 |  Coadd 
    8425 | 2021-12-18 03:20:29 |         MASTER-OAFA | (09h 08m 38.08s , -04d 41m 08.9s) |   C |   180 | 17.2 |        
    8512 | 2021-12-18 03:21:55 |          MASTER-IAC | (09h 07m 37.32s , -03d 56m 10.9s) |  P- |   180 | 17.5 |        
    8624 | 2021-12-18 03:23:48 |         MASTER-OAFA | (09h 08m 38.25s , -04d 42m 58.1s) |   C |   180 | 17.4 |        
    8712 | 2021-12-18 03:25:15 |          MASTER-IAC | (09h 07m 41.99s , -03d 57m 13.3s) |  P- |   180 | 17.6 |        
    8824 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   180 | 17.6 |        
    9004 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   540 | 18.3 |  Coadd 
    8912 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   180 | 17.6 |        
    9092 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   540 | 18.9 |  Coadd 
    9029 | 2021-12-18 03:30:32 |         MASTER-OAFA | (09h 08m 36.24s , -04d 42m 01.0s) |   C |   180 | 17.6 |        
    9228 | 2021-12-18 03:33:52 |         MASTER-OAFA | (09h 08m 35.95s , -04d 41m 00.3s) |   C |   180 | 17.7 |        
    9216 | 2021-12-18 03:34:39 |          MASTER-IAC | (09h 03m 45.12s , -04d 22m 19.5s) |   C |    60 | 17.9 |        
    9297 | 2021-12-18 03:36:01 |          MASTER-IAC | (09h 02m 40.36s , -02d 26m 41.7s) |   C |    60 | 17.5 |        
    9843 | 2021-12-18 03:44:06 |          MASTER-IAC | (09h 07m 40.85s , -03d 56m 48.4s) |   C |   180 | 18.4 |        
   10043 | 2021-12-18 03:47:26 |          MASTER-IAC | (09h 07m 34.50s , -03d 57m 52.7s) |   C |   180 | 18.5 |        
   10782 | 2021-12-18 04:00:46 |          MASTER-IAC | (09h 03m 47.47s , -04d 21m 06.6s) |   C |    60 | 18.0 |        
   10867 | 2021-12-18 04:02:10 |          MASTER-IAC | (09h 02m 33.04s , -02d 27m 43.5s) |   C |    60 | 17.6 |        
   11488 | 2021-12-18 04:11:32 |         MASTER-OAFA | (09h 08m 39.32s , -04d 41m 33.4s) |   C |   180 | 17.8 |        
   11688 | 2021-12-18 04:14:52 |         MASTER-OAFA | (09h 08m 39.60s , -04d 42m 35.8s) |   C |   180 | 18.1 |        
   11807 | 2021-12-18 04:16:50 |          MASTER-IAC | (09h 07m 33.75s , -03d 56m 00.3s) |   C |   180 | 18.5 |        
   12007 | 2021-12-18 04:20:10 |          MASTER-IAC | (09h 07m 33.67s , -03d 57m 23.8s) |   C |   180 | 18.5 |        
   12347 | 2021-12-18 04:26:50 |          MASTER-IAC | (09h 03m 40.77s , -04d 21m 55.8s) |   C |    60 | 18.0 |        
   12427 | 2021-12-18 04:28:10 |          MASTER-IAC | (09h 02m 32.18s , -02d 26m 54.8s) |   C |    60 | 17.7 |        
   12768 | 2021-12-18 04:32:51 |          MASTER-IAC | (09h 03m 55.06s , -03d 59m 35.6s) |   C |   180 | 18.5 |        
   12947 | 2021-12-18 04:36:51 |         MASTER-OAFA | (09h 04m 28.00s , -03d 41m 00.9s) |   C |    60 | 17.6 |        
   13027 | 2021-12-18 04:38:10 |         MASTER-OAFA | (09h 12m 23.04s , -03d 41m 47.9s) |   C |    60 | 17.7 |        
   13106 | 2021-12-18 04:39:30 |         MASTER-OAFA | (09h 03m 21.35s , -01d 47m 52.1s) |   C |    60 | 17.3 |        
   13186 | 2021-12-18 04:40:49 |         MASTER-OAFA | (09h 11m 14.49s , -01d 48m 42.1s) |   C |    60 | 17.6 |        
   13768 | 2021-12-18 04:49:31 |          MASTER-IAC | (09h 07m 33.44s , -03d 58m 13.5s) |   C |   180 | 18.5 |        
   13968 | 2021-12-18 04:52:52 |          MASTER-IAC | (09h 07m 40.14s , -03d 58m 04.3s) |   C |   180 | 18.5 |        
   14000 | 2021-12-18 04:54:24 |         MASTER-OAFA | (09h 04m 29.64s , -03d 42m 02.2s) |   C |    60 | 17.7 |        
   14080 | 2021-12-18 04:55:43 |         MASTER-OAFA | (09h 12m 25.06s , -03d 42m 49.9s) |   C |    60 | 17.8 |        
   14168 | 2021-12-18 04:56:12 |          MASTER-IAC | (09h 03m 56.46s , -03d 57m 43.5s) |   C |   180 | 18.5 |        
   14160 | 2021-12-18 04:57:03 |         MASTER-OAFA | (09h 03m 23.12s , -01d 48m 30.6s) |   C |    60 | 17.4 |        
   14239 | 2021-12-18 04:58:22 |         MASTER-OAFA | (09h 11m 19.66s , -01d 46m 46.7s) |   C |    60 | 17.6 |        
   14974 | 2021-12-18 05:09:38 |          MASTER-IAC | (09h 03m 58.90s , -03d 59m 18.7s) |   C |   180 | 18.5 |        
   14976 | 2021-12-18 05:10:39 |         MASTER-OAFA | (09h 04m 27.20s , -03d 43m 04.5s) |   C |    60 | 17.7 |        
   15055 | 2021-12-18 05:11:58 |         MASTER-OAFA | (09h 12m 30.67s , -03d 40m 55.4s) |   C |    60 | 17.7 |        
   15134 | 2021-12-18 05:13:18 |         MASTER-OAFA | (09h 03m 16.13s , -01d 48m 00.2s) |   C |    60 | 17.4 |        
   15214 | 2021-12-18 05:14:37 |         MASTER-OAFA | (09h 11m 17.09s , -01d 46m 47.4s) |   C |    60 | 17.6 |        
   16330 | 2021-12-18 05:32:13 |         MASTER-OAFA | (09h 08m 38.57s , -03d 18m 39.9s) |   C |   180 | 18.0 |        
   16529 | 2021-12-18 05:35:33 |         MASTER-OAFA | (09h 08m 39.25s , -03d 17m 35.0s) |   C |   180 | 18.3 |        
   16729 | 2021-12-18 05:38:52 |         MASTER-OAFA | (09h 08m 45.18s , -03d 18m 32.6s) |   C |   180 | 18.3 |        
   17745 | 2021-12-18 05:55:49 |         MASTER-OAFA | (09h 08m 37.62s , -03d 18m 44.4s) |   C |   180 | 18.3 |        
   18832 | 2021-12-18 06:13:55 |         MASTER-OAFA | (09h 08m 40.02s , -03d 18m 12.9s) |   C |   180 | 18.3 |        
   19632 | 2021-12-18 06:27:15 |          MASTER-IAC | (09h 08m 21.41s , -04d 03m 29.7s) |   C |   180 | 18.4 |        
   19632 | 2021-12-18 06:27:15 |          MASTER-IAC | (09h 07m 26.01s , -03d 56m 50.7s) |   C |   180 | 18.2 |        
   19915 | 2021-12-18 06:31:59 |          MASTER-IAC | (09h 08m 26.96s , -04d 03m 32.6s) |   C |   180 | 18.6 |        
   19915 | 2021-12-18 06:31:59 |          MASTER-IAC | (09h 07m 31.72s , -03d 56m 57.7s) |   C |   180 | 18.3 |        
   21496 | 2021-12-18 06:58:20 |          MASTER-IAC | (09h 08m 25.26s , -04d 04m 26.1s) |   C |   180 | 18.1 |        
   21496 | 2021-12-18 06:58:20 |          MASTER-IAC | (09h 07m 31.81s , -03d 58m 03.5s) |   C |   180 | 17.6 |        
   21784 | 2021-12-18 07:03:07 |          MASTER-IAC | (09h 08m 22.46s , -04d 04m 35.1s) |   C |   180 | 17.6 |        
   21784 | 2021-12-18 07:03:07 |          MASTER-IAC | (09h 07m 29.17s , -03d 58m 14.4s) |   C |   180 | 17.2 |        
   22239 | 2021-12-18 07:10:42 |         MASTER-OAFA | (09h 08m 36.63s , -03d 18m 40.7s) |   C |   180 | 18.5 |        
   22419 | 2021-12-18 07:10:42 |         MASTER-OAFA | (09h 08m 36.63s , -03d 18m 40.8s) |   C |   540 | 19.2 |  Coadd 
   22439 | 2021-12-18 07:14:02 |         MASTER-OAFA | (09h 08m 36.67s , -03d 19m 57.3s) |   C |   180 | 18.5 |        
   22859 | 2021-12-18 07:21:03 |         MASTER-OAFA | (09h 08m 32.55s , -03d 18m 18.6s) |   C |   180 | 18.6 |        
   23059 | 2021-12-18 07:24:22 |         MASTER-OAFA | (09h 08m 37.74s , -03d 19m 18.8s) |   C |   180 | 18.5 |        
   23239 | 2021-12-18 07:24:22 |         MASTER-OAFA | (09h 08m 37.74s , -03d 19m 18.8s) |   C |   540 | 19.2 |  Coadd 
   23290 | 2021-12-18 07:28:14 |         MASTER-OAFA | (09h 08m 32.08s , -03d 20m 18.6s) |   C |   180 | 18.5 |        
   23490 | 2021-12-18 07:31:33 |         MASTER-OAFA | (09h 08m 38.92s , -03d 19m 51.5s) |   C |   180 | 18.5 |        
   24073 | 2021-12-18 07:41:16 |         MASTER-OAFA | (09h 08m 36.42s , -04d 42m 28.4s) |   C |   180 | 18.4 |        
   24273 | 2021-12-18 07:44:36 |         MASTER-OAFA | (09h 08m 36.65s , -04d 41m 22.8s) |   C |   180 | 18.6 |        
   25901 | 2021-12-18 08:11:44 |         MASTER-OAFA | (09h 08m 41.74s , -04d 43m 23.9s) |   C |   180 | 18.6 |        
   26100 | 2021-12-18 08:15:04 |         MASTER-OAFA | (09h 08m 38.87s , -04d 42m 01.0s) |   C |   180 | 18.6 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



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

  ID = 5416
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB211218.04 (trigger No 566013095,09h 09m 06.72s , -04d 06m 36.0s, R=1) errorbox 8135 sec after trigger time at 2021-12-18 03:17:09 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -32.8 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB211218.04 errorbox  19 sec after notice time and 8221 sec after trigger time at 2021-12-18 03:18:35 UT, with upper limit up to  17.6 mag. The observations began at zenith distance = 36 deg. The sun  altitude  is -58.4 deg. 

The galactic latitude b = 28 deg., longitude l = 235 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1818127

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    8226 | 2021-12-18 03:17:09 |         MASTER-OAFA | (09h 08m 40.94s , -04d 42m 54.3s) |   C |   180 | 17.1 |        
    8312 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   180 | 17.3 |        
    8425 | 2021-12-18 03:20:29 |         MASTER-OAFA | (09h 08m 38.08s , -04d 41m 08.9s) |   C |   180 | 17.2 |        
    8512 | 2021-12-18 03:21:55 |          MASTER-IAC | (09h 07m 37.32s , -03d 56m 10.9s) |  P- |   180 | 17.5 |        
    8624 | 2021-12-18 03:23:48 |         MASTER-OAFA | (09h 08m 38.25s , -04d 42m 58.1s) |   C |   180 | 17.4 |        
    8712 | 2021-12-18 03:25:15 |          MASTER-IAC | (09h 07m 41.99s , -03d 57m 13.3s) |  P- |   180 | 17.6 |        
    8824 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   180 | 17.6 |        
    9004 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   540 | 18.3 |  Coadd 
    8912 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   180 | 17.6 |        
    9029 | 2021-12-18 03:30:32 |         MASTER-OAFA | (09h 08m 36.24s , -04d 42m 01.0s) |   C |   180 | 17.6 |        
    9228 | 2021-12-18 03:33:52 |         MASTER-OAFA | (09h 08m 35.95s , -04d 41m 00.3s) |   C |   180 | 17.7 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



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

  ID = 5415
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB211218.04 (trigger No 566013095,09h 09m 06.72s , -04d 06m 36.0s, R=1) errorbox 8135 sec after trigger time at 2021-12-18 03:17:09 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -32.8 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB211218.04 errorbox  19 sec after notice time and 8221 sec after trigger time at 2021-12-18 03:18:35 UT, with upper limit up to  17.6 mag. The observations began at zenith distance = 36 deg. The sun  altitude  is -58.4 deg. 

The galactic latitude b = 28 deg., longitude l = 235 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1818127

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    8226 | 2021-12-18 03:17:09 |         MASTER-OAFA | (09h 08m 40.94s , -04d 42m 54.3s) |   C |   180 | 17.1 |        
    8312 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   180 | 17.3 |        
    8425 | 2021-12-18 03:20:29 |         MASTER-OAFA | (09h 08m 38.08s , -04d 41m 08.9s) |   C |   180 | 17.2 |        
    8512 | 2021-12-18 03:21:55 |          MASTER-IAC | (09h 07m 37.32s , -03d 56m 10.9s) |  P- |   180 | 17.5 |        
    8624 | 2021-12-18 03:23:48 |         MASTER-OAFA | (09h 08m 38.25s , -04d 42m 58.1s) |   C |   180 | 17.4 |        
    8712 | 2021-12-18 03:25:15 |          MASTER-IAC | (09h 07m 41.99s , -03d 57m 13.3s) |  P- |   180 | 17.6 |        
    8824 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   180 | 17.6 |        
    9004 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   540 | 18.3 |  Coadd 
    8912 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   180 | 17.6 |        
    9029 | 2021-12-18 03:30:32 |         MASTER-OAFA | (09h 08m 36.24s , -04d 42m 01.0s) |   C |   180 | 17.6 |        
    9228 | 2021-12-18 03:33:52 |         MASTER-OAFA | (09h 08m 35.95s , -04d 41m 00.3s) |   C |   180 | 17.7 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



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

  ID = 5414
TYPE = 34
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB211218.04 (trigger No 566013095,09h 09m 06.72s , -04d 06m 36.0s, R=1) errorbox 8135 sec after trigger time at 2021-12-18 03:17:09 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -32.8 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB211218.04 errorbox  19 sec after notice time and 8221 sec after trigger time at 2021-12-18 03:18:35 UT, with upper limit up to  17.6 mag. The observations began at zenith distance = 36 deg. The sun  altitude  is -58.4 deg. 

The galactic latitude b = 28 deg., longitude l = 235 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1818127

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    8226 | 2021-12-18 03:17:09 |         MASTER-OAFA | (09h 08m 40.94s , -04d 42m 54.3s) |   C |   180 | 17.1 |        
    8312 | 2021-12-18 03:18:35 |          MASTER-IAC | (09h 07m 36.35s , -03d 57m 06.9s) |  P- |   180 | 17.3 |        
    8425 | 2021-12-18 03:20:29 |         MASTER-OAFA | (09h 08m 38.08s , -04d 41m 08.9s) |   C |   180 | 17.2 |        
    8512 | 2021-12-18 03:21:55 |          MASTER-IAC | (09h 07m 37.32s , -03d 56m 10.9s) |  P- |   180 | 17.5 |        
    8624 | 2021-12-18 03:23:48 |         MASTER-OAFA | (09h 08m 38.25s , -04d 42m 58.1s) |   C |   180 | 17.4 |        
    8712 | 2021-12-18 03:25:15 |          MASTER-IAC | (09h 07m 41.99s , -03d 57m 13.3s) |  P- |   180 | 17.6 |        
    8824 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   180 | 17.6 |        
    9004 | 2021-12-18 03:27:07 |         MASTER-OAFA | (09h 08m 40.94s , -04d 41m 10.4s) |   C |   540 | 18.3 |  Coadd 
    8912 | 2021-12-18 03:28:35 |          MASTER-IAC | (09h 07m 36.10s , -03d 58m 14.8s) |  P- |   180 | 17.6 |        
    9029 | 2021-12-18 03:30:32 |         MASTER-OAFA | (09h 08m 36.24s , -04d 42m 01.0s) |   C |   180 | 17.6 |        
    9228 | 2021-12-18 03:33:52 |         MASTER-OAFA | (09h 08m 35.95s , -04d 41m 00.3s) |   C |   180 | 17.7 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.

MASTER, 2002-2025