GRB201227A

This page lists all entries on GRB201227A in GRBweb

Summary Fermi GBM IPN GCN 29179 GCN 29182 GCN 29184 GCN 29185 GCN 29187 GCN 29196 GCN 29202 GCN 29206 GCN 29208 GCN 29276 GCN 29281

Summary table
Variable Value Source
GRB_name_Fermi GRB201227635
T0 15:14:06.705 UTC GCN_circulars,Konus-Wind Det
ra 170.1208° IPN
decl -73.6167° IPN
pos_error 1.45e+00° IPN
T90 0.096 s Fermi_GBM
T90_error 0.101 s Fermi_GBM
T90_start 15:14:07.399 UTC Fermi_GBM
fluence 3.37e-06 erg/cm² Fermi_GBM
fluence_error 3.02e-08 erg/cm² Fermi_GBM
T100 0.79 s
GBM_located False
mjd 59210.63479982639 GCN_circulars,Konus-Wind Det
Fermi GBM table
GRB_name_Fermi GRB201227635
trigger_name bn201227635
ra 182.7900°
decl -73.0300°
pos_error 4.49e+00°
datum 2020-12-27
t_trigger 15:14:07.415 UTC
T90 0.096 s
T90_error 0.101 s
T90_start 15:14:07.399 UTC
fluence 3.37e-06 erg/cm²
fluence_error 3.02e-08 erg/cm²
flux_1024 8.37e+00 erg/cm²/s
flux_1024_error 4.81e-01 erg/cm²/s
flux_1024_time -5.12e-01 erg/cm²/s
flux_64 1.00e+02 erg/cm²/s
flux_64_error 4.73e+00 erg/cm²/s
IPN table
GRB_name GRB201227A
ra 170.1208°
decl -73.6167°
pos_error 1.45e+00°
GCN 29179 table
GRB_name GRB201227A
GCN_number 29179
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 29179 SUBJECT: GRB 201227A: AGILE detection of a burst DATE: 20/12/27 19:57:36 GMT FROM: Francesco Longo at U of Trieste,INFN Trieste A. Ursi (INAF/IAPS), F. Verrecchia, C. Pittori (SSDC, and INAF/OAR), F. Longo (Univ. Trieste and INFN Trieste), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C. Casentini, Y.Evangelista, G. Piano (INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, N. Parmiggiani (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), report on behalf of the AGILE Team: The AGILE Mini-CALorimeter (MCAL) detected a short burst at T0 = 2020-12-27 15:14:07.40 +/- 0.01 s (UTC) detected also by Fermi/GBM (trigger 630774852). The event lasted about 0.10 s and released a total number of ~480 counts in the detector (in the 0.4-100 MeV energy range), above an average background rate of 676 counts / s. The light curve shows a single sharp peak and can be found at http://www.agilescienceapp.it/notices/GRB_071058_536166847.405605.png. The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the energy range 0.4-100 MeV. Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert Notices can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html.
GCN 29182 table
GRB_name GRB201227A
GCN_number 29182
Detection_method IPN Triangulation
t_trigger 15:14:07 UTC
ra 170.1210°
decl -73.6130°
Circular_text TITLE: GCN CIRCULAR NUMBER: 29182 SUBJECT: IPN triangulation of GRB 201227A (short) DATE: 20/12/28 01:07:52 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, K. Hurley, on behalf of the IPN, A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, and A. Ursi, N. Parmiggiani, F. Verrecchia, A. Bulgarelli, A. Trois, M. Marisaldi, C. Pittori, M. Tavani, Y. Evangelista, I. Donnarumma, M. Cardillo, G. Piano, G. Minervini, A. Argan, F. Lucarelli, A. Zoli, V. Fioretti, F. Fuschino, M. Pilia, F. Longo, A. Giuliani on behalf of the AGILE team, report: The short-duration, very bright GRB 201227A (AGILE detection: Ursi et al., GCN Circ. 29179) has been detected by Fermi (GBM trigger 630774852), Konus-Wind, INTEGRAL (SPI-ACS), AGILE (MCAL), and Swift (BAT), so far, at about 54847 s UT (15:14:07). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: - --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 170.121 (11h 20m 29s) -73.613 (-73d 36' 48") Corners: 171.971 (11h 27m 53s) -73.140 (-73d 08' 22") 171.755 (11h 27m 01s) -73.060 (-73d 03' 36") 168.169 (11h 12m 41s) -74.071 (-74d 04' 16") 168.379 (11h 13m 31s) -74.155 (-74d 09' 17") --------------------------------------------- The error box area is 517 sq. arcmin, and its maximum dimension is 1.45 deg (the minimum one is 6 arcmin). The Sun distance was 72 deg. This box may be improved. The Swift ToO has been submitted. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB201227_T54847/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN 29184 table
GRB_name GRB201227A
GCN_number 29184
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 29184 SUBJECT: GRB 201227A: Swift ToO observations DATE: 20/12/28 05:18:20 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a ToO observation of the IPN GRB 201227A. Automated analysis of the XRT data will be presented online at https://www.swift.ac.uk/ToO_GRBs/00021409 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the IPN event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 29185 table
GRB_name GRB201227A
GCN_number 29185
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 29185 SUBJECT: GRB 201227A: Tiled Swift observations DATE: 20/12/28 05:35:59 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a series of observations, tiled on the sky, of the IPN GRB 201227A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00096 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. The probability of finding serendipitous sources, unrelated to the IPN event is high: any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 29187 table
GRB_name GRB201227A
GCN_number 29187
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 29187 SUBJECT: GRB 201227A: Insight-HXMT/HE detection DATE: 20/12/28 15:00:13 GMT FROM: Shuo Xiao at IHEP S. Xiao, C. Cai, Y. F. Du, Y. G. Zheng, Q. Luo, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: At 2020-12-27T15:14:07.400 (T0), Insight-HXMT/HE detected GRB 201227A (trigger ID: HEB201227634) in a routine search of the data, which also triggered Fermi/GBM (trigger 630774852) and AGILE Mini-CALorimeter (GCN#29179). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 0.098 s measured from T0-0.03 s. The 1-ms peak rate, measured from T0+0.024 s, is 52740 cnts/sec. The total counts from this burst is 1612 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB201227634_lc.jpg The HE light curves have not been corrected for data saturation caused by the extreme brightness of this burst in HE. All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.
GCN 29196 table
GRB_name GRB201227A
GCN_number 29196
Detection_method Konus-Wind Det
t_trigger 15:14:06.705 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 29196 SUBJECT: Konus-Wind observation of GRB 201227A DATE: 20/12/29 16:42:04 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, M. Ulanov, A. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, report: The short-duration, very bright GRB 201227A (AGILE detection: Ursi et al., GCN Circ. 29179; IPN triangulation: Svinkin et al., GCN Circ. 29182; Insight-HXMT/HE detection: Xiao et al., GCN Circ. 29187) triggered Konus-Wind at T0=54846.705 s UT (15:14:06.705). The burst light curve shows a multipeaked structure which starts at ~T0-28 ms and has a total duration of ~106 ms. The emission is seen up to ~4 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB201227_T54846/ As observed by Konus-Wind, the burst had a fluence of 4.30(-0.52,+0.54)x10^-6 erg/cm2, and a 16-ms peak flux, measured from T0, of 1.05(-0.18,+0.18)x10^-4 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+0.064 s) is best fit in the 20 keV - 4 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.17(-0.18,+0.21) and Ep = 870(-130,+151) keV (chi2 = 17/19 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.3 (chi2 = 17/18 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN 29202 table
GRB_name GRB201227A
GCN_number 29202
Detection_method Swift-XRT Other
ra 170.6083°
decl -73.4880°
Circular_text TITLE: GCN CIRCULAR NUMBER: 29202 SUBJECT: GRB 201227A: Swift-XRT observations DATE: 20/12/30 00:59:11 GMT FROM: Aaron Tohuvavohu at U Toronto V. D'Elia (SSDC & INAF-OAR), A. D'Ai (INAF-IASFPA), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), A. Melandri (INAF-OAB) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the IPN-detected burst GRB 201227A (Ursi et al. GCN Circ. 29179) in a series of observations tiled on the sky. The total exposure time is 7.5 ks, distributed over 4 tiles; the maximum exposure at a single sky location was 5.3 ks. The data were collected between T0+51.6 ks and T0+80.7 ks, and are entirely in Photon Counting (PC) mode. Four uncatalogued X-ray sources have been detected, however none of them is above the RASS limit or shows definitive signs of fading. Therefore, at the present time we cannot identify which, if any, is the afterglow. Details of these sources are given below: Source 1: RA (J2000): 170.6083 = 11:22:25.99 Dec (J2000): -73.4880 = -73:29:16.9 Error: 7.4 arcsec (radius, 90% conf.) Count-rate: (4.4 [+1.7, -1.4])e-3 ct s^-1 Distance: 670 arcsec from IPN position. Flux: (9.0 [+3.5, -2.8])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 2: RA (J2000): 170.6190 = 11:22:28.57 Dec (J2000): -73.4798 = -73:28:47.2 Error: 4.8 arcsec (radius, 90% conf.) Count-rate: (3.6 [+1.6, -1.3])e-3 ct s^-1 Distance: 698 arcsec from IPN position. Flux: (1.34 [+0.60, -0.47])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 3: RA (J2000): 169.8508 = 11:19:24.19 Dec (J2000): -73.5866 = -73:35:11.9 Error: 5.6 arcsec (radius, 90% conf.) Count-rate: (2.8 [+1.4, -1.1])e-3 ct s^-1 Distance: 290 arcsec from IPN position. Source 4: RA (J2000): 171.2953 = 11:25:10.87 Dec (J2000): -73.6326 = -73:37:57.4 Error: 4.4 arcsec (radius, 90% conf.) Count-rate: (4.2 [+2.6, -1.9])e-3 ct s^-1 Distance: 1194 arcsec from IPN position. The results of the XRT-team automatic analysis of the tiled XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/xrt_products/TILED_GRB00096. This circular is an official product of the Swift-XRT team.
GCN 29206 table
GRB_name GRB201227A
GCN_number 29206
Detection_method Fermi GBM Det
t_trigger 15:14:07.410 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 29206 SUBJECT: GRB 201227A: Fermi GBM observation DATE: 20/12/30 14:00:33 GMT FROM: Rachel Dunwoody at UCD S. Lesage, P. Veres, C. Meegan (all UAH), J. Mangan (UCD) and R. Dunwoody (UCD) report on behalf of the Fermi GBM Team: "At 15:14:07.41 UT on 23 December 2020, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 201227A (trigger 630774852 / 201227635), which was also detected by Konus-Wind (Svinkin et al. GCN 29196), Insight-HXMT (Xiao et al., GCN 29187), AGILE (Ursi et al., GCN 29179) and IPN (Svinkin et al., GCN 29182). The GBM on-ground location is consistent with the IPN position. The angle from the Fermi LAT boresight at the GBM trigger time is 135 degrees. The GBM light curve consists of a short bright pulse with a duration (T90) of about 0.1 s (50-300 keV). The time-averaged spectrum from T0-64 ms to T0+128 ms is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.47 +/- 0.07 and the cutoff energy, parameterized as Epeak, is 1076 +/- 96 keV. The event fluence (10-1000 keV) in this time interval is (3.6 +/- 0.1)E-6 erg/cm^2. The 64-ms peak photon flux measured starting from T0 in the 10-1000 keV band is 100 +/- 5 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN 29208 table
GRB_name GRB201227A
GCN_number 29208
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 29208 SUBJECT: GRB 201227A: Chilescope optical observations, possible optical counterpart DATE: 20/12/30 21:14:02 GMT FROM: Alexei Pozanenko at IKI, Moscow S. Belkin (IKI), A. Pozanenko (IKI), M. Krugov (FAI), P. Minaev (IKI) report on behalf of GRB IKI FuN collaboration: We observed the field of XRT 1-3 sources (D'Elia et al., GCN 29202) (hereafter X1,X2,X3) found in IPN localization area (Svinkin et al., GCN 29182) of GRB 201227A (Ursi et al., GCN 29179; Xiao et al., GCN 29187; Svinkin et al., GCN 29196; Lesage et al., GCN 29206) with Chilescope RC-1000 starting on 2020-12-29 (UT) 04:02:05 in r'-filter. The X3 source was observed by one 300 s exposure, and the filed of X1,X2 was observed by 3*300 s exposure. The limiting magnitude of single exposure of X3 and the stacked 3*300 s exposure is about r'=20.9. There are two optical sources close or on the edge of the XRT error circle localization of X3. Both sources are present in USNO-B1.0 and our photometry of the sources show no excess in brightness in comparison with any R-mag of USNO-B1.0. Also there are two optical sources close or on the edge of the XRT error circle localization of X1. Both source are also present in USNO-B1.0 and our photometry of the sources show no excess in brightness in comparison with any R-mag of USNO-B1.0. At the edges of X2 error circle we found two sources which not presented in USNO-B1.0. The coordinates of the first one (X2_O1) is RA(J2000)=11h 22m 29.34s, Dec(J2000)=-73d 28’ 44.9’’. The photometry of the source is r'= 20.50 +/-0.29 and the source is barely visible in DSS2 plate. The coordinates of second one (X2_02) is RA(J2000)=11h 22m 27.94s, Dec(J2000)=-73d 28’ 50.6’’. The photometry of the source is r'= 20.52 +/-0.29 and the source is not presented in DSS2 plate. We may suggest the optical object X2_02 could be a counterpart of GRB 201227A. The photometry is based on nearby stars from the APASS_DR8 and still preliminary RA DEC r 11:19:31.40904 -73:35:47.6880 14.090 11:19:44.89128 -73:34:49.6092 15.180 11:19:36.65304 -73:36:30.2112 15.307 Taking into account that early more deep observations of the IPN field by GRAWITA VST-ESO PARANAL (Izzo et al., GCN 29207) does no show any counterpart we may suggest the X2_O2 source (RA(J2000)=11h 22m 27.936s, Dec(J2000)=-73d 28’ 50.55’’) is a possible optical counterpart or kilonova of GRB 201227A.
GCN 29276 table
GRB_name GRB201227A
GCN_number 29276
Detection_method Fermi GBM Det
t_trigger 15:14:07.380 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 29276 SUBJECT: GRB 201227A: ASIM observation DATE: 21/01/07 14:29:38 GMT FROM: Martino Marisaldi at U of Bergen, Norway M. Marisaldi (University of Bergen), A. Mezentsev (University of Bergen), N. Østgaard (University of Bergen), V. Reglero (University of Valencia) and T. Neubert (DTU Space) report on behalf of the ASIM Team: At 15:14:07.380 UT on 27 December 2020, the Atmosphere-Space Interactions Monitor (ASIM) mission triggered on the very short and bright GRB 201227A (AGILE detection: Ursi et al., GCN Circ. 29179; IPN triangulation: Svinkin et al., GCN Circ. 29182; Swift observations: Evans, GCN Circ. 29184; Evans, GCN Circ. 29185; D’Elia et al., GCN Circ. 29202; Insight-HXMT/HE detection: Xiao et al., GCN Circ. 29187; Konus-Wind observation: Svinkin et al., GCN Circ. 29196; Fermi GBM observation: Lesage et al., GCN Circ. 29206; GRAWITA VST observation: Izzo et al., GCN Circ. 29207 Chilescope observation: Belkin et al., GCN Circ. 29208) Photon by photon data with <1 microsecond time resolution have been collected for a time interval of two seconds centered at the trigger time. As seen by the Modular X- and Gamma-Ray Sensor (MXGS) onboard ASIM the burst consists of a single emission episode about 60 ms in duration, with evidence of time variability. The emission is detected in the MXGS High Energy Detector (HED), sensitive in the range 0.3 to >30 MeV. Significant emission is observed up to about 3 MeV. The MXGS Low Energy Detector (LED), sensitive in the range 0.05 to 0.4 MeV, was not active at trigger time. ASIM is an ESA mission onboard the International Space Station dedicated to the observation of Terrestrial Gamma-ray Flashes (TGFs) and Transient Luminous Events (TLEs) operative since June 2018 (Neubert et al., Space Sci Rev (2019) 215:26 https://doi.org/10.1007/s11214-019-0592-z ). The payload includes the Modular X- and Gamma-Ray Sensor (MXGS) (Østgaard et al., Space Sci Rev (2019) 215:23 https://doi.org/10.1007/s11214-018-0573-7 ), and the the Modular Multispectral Imaging Array (MMIA) (Chanrion et al., Space Sci Rev (2019) 215:28 https://doi.org/10.1007/s11214-019-0593-y ). The ASIM Science Data Centre (ASDC) website is https://asdc.space.dtu.dk/
GCN 29281 table
GRB_name GRB201227A
GCN_number 29281
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 29281 SUBJECT: GRB 201227A: continued Chilescope confirmation of variability of possible optical counterpart, redshift estimating DATE: 21/01/08 16:20:33 GMT FROM: Alexei Pozanenko at IKI, Moscow S. Belkin (IKI), A. Pozanenko (IKI), P. Minaev (IKI), M. Krugov (FAI) report on behalf of GRB IKI FuN collaboration: We continued observations of the field of XRT #2 sources (D'Elia et al., GCN 29202) (hereafter X2) found in IPN localization area (Svinkin et al., GCN 29182) of GRB 201227A (Ursi et al., GCN 29179; Xiao et al., GCN 29187; Svinkin et al., GCN 29196; Lesage et al., GCN 29206; Marisaldi et al., GCN 29276) with Chilescope RC-1000 on 2021-01-01 and 2021-01-08 in r'-filter. The X2_O2 object found in previous observation on 2020-12-29 at r'(AB)= 20.5 (Belkin et al., GCN 29208; see also Izzo et al., GCN 29207) is not detected on 2021-01-01 with an upper limit of r'(AB) > 20.6 and barely detected on 2021-01-08 at r'(AB)=22.6. Now we confirm the variability of the object of X2_O2 and suggest the optical object X2_02 could be a counterpart of GRB 201227A. In the last image on 2021-01-08, the object X2_O2 could be the host galaxy. A finding chart of the X2_O2 can be found in http://grb.rssi.ru/GRB201227A/GRB201227A_r_FC_201229_2100108.png Preliminary photometry of the X2_O2 is following Date UT start t-T0 Filter Exp. OT(AB) Err. UL(AB) FWHM (mid, days) (s) 2021-01-01 05:57:21 4.63072 r' 5*600 n/d n/d 20.6 1.5" 2021-01-08 04:15:45 11.5636 r' 3*1200 22.6 0.4 22.5 1.4" The photometry is based on nearby stars from the APASS_DR8 RA DEC r 11:19:31.40904 -73:35:47.6880 14.090 11:19:44.89128 -73:34:49.6092 15.180 11:19:36.65304 -73:36:30.2112 15.307 In addition we investigated a position of the GRB 201227A on the EHD diagram (see Minaev et al., MNRAS, 492, 1919, 2020). The position of GRB 201227A based on Konus-Wind data (Svinkin et al., GCN Circ. 29196) can be found in http://grb.rssi.ru/GRB201227A/GRB201227A_EH_T90i.png We can exclude the GRB 201227A as a giant flare event of SGR since there is no nearby galaxies in the IPN error box. We can identify the GRB 201227A as short GRB at a redshift of z > 0.05.