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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

24511 results found.

  1. GRB 130513A: a long GRB detected by INTEGRAL
  2. GRB130508A: MASTER-Net optical observations
  3. GRB 130511A: Kanata/HOWPol optical observation
  4. GRB 130511A: MITSuME Okayama upper limits
  5. GRB 130511A, Swift-BAT refined analysis
  6. GRB 130511A: Upper limit by Xinglong TNT optical observation
  7. GRB 130508A: MITSuME Akeno upper limits
  8. GRB 130427A: Keck/LRIS Observations
  9. GRB 130508A, Swift-BAT refined analysis
  10. GRB 130508A: MITSuME Okayama upper limits
  11. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  12. GRB 130508A: Swift detection of a probable burst
  13. GRB 130505A: MITSuME Akeno Optical observation
  14. GRB 130504C: Suzaku WAM observation of the prompt emission
  15. GRB 130504B: Suzaku WAM observation of the prompt emission
  16. GRB 130505A: Suzaku WAM observation of the prompt emission
  17. GRB 130427A: RHESSI observations
  18. GRB 130505A, Swift-BAT refined analysis
  19. Konus-Wind observation of GRB 130504C
  20. GRB 130504C: Fermi GBM detection
  21. GRB 130505A: Swift-XRT refined Analysis
  22. Konus-Wind observation of GRB 130505A
  23. GRB 130504C: Fermi-LAT detection of a burst
  24. GRB 130505A: iTelescope T12 optical observations
  25. GRB 130505A: Xinglong TNT optical observations
  26. GRB 130505A; Weihai optical observations
  27. GRB 130505A: MITSuME Okayama Optical Observation
  28. GRB 130505A: MAXI/GSC detection
  29. GRB 130504A: MITSuME Okayama upper limits
  30. GRB 130504B: Fermi GBM detection
  31. GRB 130502B: Suzaku WAM observation of the prompt emission
  32. GRB 130504A, Swift-BAT refined analysis
  33. GRB 130502B: possible TNG counterpart
  34. GRB 130502A: Swift-BAT refined analysis
  35. GRB 130427A: Non-observation of VHE emission with HAWC
  36. GRB130502A: MASTER-Net optical observations
  37. GRB 130502A: Fermi GBM detection
  38. Konus-Wind observation of GRB 130502B
  39. GRB 130502B: P60 Observations
  40. GRB 130418A: TNG NIR observations
  41. GRB 130427A: MITSuME Ishigakijima Optical Observation after 5 days
  42. GRB 130502A: z-band observations from GTC
  43. GRB 130502B: Fermi LAT Detection
  44. GRB 130502A: TNG candidate counterpart
  45. GRB 130502B: Fermi GBM detection of a burst
  46. GRB 130502A: Swift detection of a burst
  47. GRB 130425A: Suzaku WAM observation of the prompt emission
  48. GRB 130427A: VLA 20 GHz detection
  49. GRB 130427A: High-energy neutrino search
  50. GRB 130427A: Continued GMG optical observations
  51. GRB 130427A: high energy gamma-ray detection by AGILE
  52. GRB 130427A: MITSuME Ishigakijima Optical Observation after 2 days
  53. GRB 130427A: Continued Skynet/PROMPT Observations
  54. GRB 130427A: Fermi-LAT refined analysis
  55. GRB 130427A: SARA-N detection
  56. GRB 130418A: Bassano Bresciano Observatory lightcurve analisis
  57. GRB 130427A: Improved Swift-XRT analysis
  58. GRB 130425: MASTER-Net optical observations
  59. GRB 130427B: MITSuME Ishigakijima upper limits
  60. GRB 130427A: MITSuME Okayama and Ishigakijima Optical Observation after 1 day
  61. GRB 130427A: Skynet/PROMPT Observations
  62. GRB 130427A: Nishi-Harima NIR Observations
  63. GRB 130427A: CARMA 3mm observations
  64. GRB 130427A : Xinglong TNT optical observation
  65. GRB 130427A optical time series
  66. GRB 130427A: Continued iTelescope T21 optical observations
  67. Konus-Wind observation of GRB 130427A
  68. GRB 130427A: SNUO/SOAO/BOAO Observation
  69. GRB 130427B: Swift-XRT refined Analysis
  70. GRB 130427A: NOT optical photometry and redshift
  71. GRB 130427B: MITSuME Okayama upper limits
  72. GRB 130427A: RAPTOR Bright Counterpart Before Swift Trigger
  73. GRB 130427A: Fermi GBM observation
  74. GRB 130427A: Fermi-LAT detection of a burst
  75. GRB 130427A: Swift-BAT refined analysis
  76. GRB 130427B: Swift-BAT refined analysis
  77. GRB 130427A: MITSuME Okayama Optical Observation
  78. GRB 130427B: Faulkes Telescope North afterglow detection
  79. GRB 130427B: Swift detection of a burst with optical counterpart
  80. GRB 130427A: Weihai optical observations
  81. GRB 130427A: iTelescope T11 optical observations
  82. GRB 130427A: MITSuME Akeno Optical observation(T0+8000s~)
  83. GRB 130427A: PAIRITEL NIR Detections
  84. GRB 130427A: Faulkes Telescope North detection
  85. Konus-Wind observation of GRB 130425A
  86. GRB 130420A: Continued Skynet/GORT Observations/Detections
  87. GRB 130425A: Fermi GBM detection
  88. GRB 130420A: ROTSE-III data analysis
  89. GRB 130420B: Fermi GBM observation
  90. GRB 130420A: Fermi GBM observation
  91. Skynet/GORT observations of GRB130420A
  92. GRB 130420B: Weihai optical upper limit
  93. GRB 130420B, Swift-BAT refined analysis
  94. GRB 130420A, Swift-BAT refined analysis
  95. Konus-Wind observation of GRB 130418A
  96. GRB130420A : Xinglong TNT optical upper limit
  97. GRB 130420B: Faulkes Telescope North observations
  98. GRB 130420B: MASTER-Net optical observations
  99. GRB 130420B: Swift detection of a burst
  100. GRB 130420A: T21 optical observations

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