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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"

24525 results found.

  1. IPN triangulation of GRB 140801A (Fermi trigger 428612396)
  2. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  3. GRB 140730A, Swift-BAT refined analysis
  4. Swift Trigger 607945: possible noise event in the direction of NGC2559
  5. Konus-Wind observation of GRB 140729A
  6. GRB 140730A: LCO-Sutherland observations
  7. GRB 140730A: Swift detection of a burst
  8. GRB 140729A: iPTF optical upper limit
  9. GRB 140729A: Swift-XRT and UVOT observations
  10. IPN Triangulation of GRB 140729A
  11. GRB 140729A: Fermi-GBM detection
  12. GRB 140729A: Fermi-LAT detection
  13. GRB 140723A: Swift-XRT and UVOT observations
  14. GRB 140723A: LCO-Sutherland optical candidate retraction
  15. GRB 140723A: MASTER optical observation
  16. Konus-Wind observation of GRB 140723A
  17. GRB 140723A: Fermi GBM detection
  18. IPN Triangulation of GRB 140723A
  19. GRB 140723A: Fermi-LAT detection
  20. Konus-Wind observation of GRB 140721A
  21. GRB 140721A: Fermi GBM detection
  22. GRB 140719B, Swift-BAT refined analysis
  23. GRB 140719A, Swift-BAT refined analysis
  24. GRB 140719A: FTS observations
  25. GRB 140719A: GROND Afterglow candidate
  26. GRB 140719B: Swift detection of a burst
  27. GRB 140719A: Swift detection of a burst
  28. Konus-Wind observation of GRB 140716A
  29. GRB 140716A: GROND afterglow candidate
  30. GRB 140716A: Swift-XRT detection of an afterglow candidate
  31. GRB 140716A: A Fermi GBM Detection
  32. GRB 140716A BAT refined analysis
  33. Swift observations of a flare from UX Ari
  34. Swift detection of UX Ari
  35. GRB 140714A: Fermi GBM detection
  36. GRB 140713A: Fermi GBM detection
  37. GRB 140713A: Swift-BAT refined analysis
  38. GRB 140713A: Swift detection of a burst
  39. GRB 140710B: Fermi GBM detection
  40. GRB 140710B: improved INTEGRAL position
  41. Fermi GBM Observations of SGR 1935+2154
  42. GRB 140710B: a long GRB detected with INTEGRAL
  43. GRB 140710A: Swift-XRT refined Analysis
  44. GRB 140710A: Swift-BAT refined analysis
  45. GRB 140710A: P60 Confirmation of Afterglow
  46. GRB 140710A: Swift detection of a burst
  47. GRB 140709B: Swift-XRT refined Analysis
  48. GRB 140709B: Fermi GBM detection
  49. GRB 140709B: Swift-BAT refined analysis
  50. GRB 140709A: Fermi GBM detection
  51. GRB 140709A, Swift-BAT refined analysis
  52. GRB 140709B: MASTER optical observation
  53. GRB 140709A: Swift-XRT refined Analysis
  54. GRB 140709A: Swift detection of a burst
  55. GRB 140705A: Nishi-Harima NIR upper limits
  56. GRB 140706A: Swift-BAT refined analysis
  57. GRB 140706A: Fermi GBM detection
  58. Pre-discovery observations of SGR 1935+2154 in Swift archival data
  59. SGR 1935+2154: Swift-BAT observations of additional short soft events
  60. GRB 140705A / SGR 1935+2154: FTN observations
  61. GRB 140705A: KAIT Optical Upper Limit
  62. GRB 140705A: MITSuME Ishigakijima upper limits
  63. GRB 140705A: MITSuME Okayama upper limits
  64. GRB 140705A: Swift-BAT refined analysis of a possible newly discovered SGR 1935+2154
  65. GRB 140621A: Suzaku WAM observation of the prompt emission
  66. GRB 140629A, Optical observations
  67. GRB 140703A: VLA K-band detection
  68. GRB 140703A: Fermi GBM detection
  69. GRB 140703A: Swift-BAT refined analysis
  70. GRB 140703A: MASTER optical observations
  71. GRB 140703A: BOOTES-2 and OSN optical observations
  72. GRB 140619C: Suzaku WAM observation of the prompt emission
  73. GRB 140629A: MITSuME Akeno Optical observation
  74. GRB 140629A: MASTER-Net preliminary light curve
  75. Fermi 425667201: optical counterpart search
  76. GRB 140629A: Nishi-Harima NIR Observations
  77. Konus-Wind observation of GRB 140629A
  78. GRB 140629A: Swift-XRT refined Analysis
  79. GRB 140629A: MITSuME Ishigakijima Optical Observation
  80. GRB 140629A: KWFC z-band photometry
  81. GRB 140629A: RTT150 optical observations
  82. GRB 140629A: Swift-BAT refined analysis
  83. GRB 140629A: MASTER OT detection
  84. GRB 140629A: Swift detection of a burst with an optical counterpart
  85. GRB 140628A: GROND observation of the afterglow
  86. GRB 140628A: Swift-BAT refined analysis
  87. GRB 140628A: Swift detection of a burst
  88. GRB 140626A: Swift-BAT refined analysis
  89. GRB 140626A: GROND Afterglow Candidate
  90. GRB 140619B: Suzaku WAM observation of the prompt emission
  91. GRB 140626A: Swift detection of a burst
  92. GRB 140624A: Fermi GBM observation of a short burst
  93. GRB 140623A: Swift-XRT and UVOT observations
  94. GRB 140623A / iPTF14cyb: Fermi GBM detection
  95. GRB 140621A: Fermi GBM detection
  96. Konus-Wind observation of GRB 140621A
  97. IPN Triangulation of GRB 140621A
  98. Konus-Wind observation of GRB 140619A
  99. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  100. GRB 140622A: KAIT Optical Upper Limit

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