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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"

11617 results found.

  1. GRB 130702A: further Swift-XRT observations
  2. GRB 130702A: Continued P60 observations
  3. GRB 130702A: CARMA 3mm detection
  4. GRB 130702A: TNG optical observations
  5. GRB 130702A / Fermi394416326 : Nanshan optical observations
  6. IPN localization of GRB 130702A (= Fermi 394416326)
  7. Fermi GRB 130702A: Swift XRT and UVOT observations
  8. GRB 130702A / Fermi394416326: Fermi GBM detection
  9. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  10. Fermi GBM trigger 394416326: MASTER early optical limit
  11. GRB 130628A: Fermi GBM detection
  12. Fermi394416326: iPTF detection of a possible optical afterglow
  13. Fermi GBM trigger 394325281 / 130630950 is not a GRB
  14. GRB 130701B: Fermi GBM detection
  15. GRB 130627A: Fermi GBM detection
  16. GRB 130623A: Fermi GBM detection
  17. GRB 130623A detected in ground analysis of Swift-BAT data
  18. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  19. GRB 130614A: Fermi GBM detection
  20. GRB 130612A: Fermi GBM observation
  21. GRB 130606B: Suzaku WAM observation of the prompt emission
  22. Recent Fermi GBM particle triggers misclassified as GRBs
  23. GRB 130609B: Fermi GBM observation
  24. GRB 130610A: Fermi GBM Observation
  25. GRB 130606B: Swift/UVOT Upper Limit
  26. GRB 130609A: Fermi GBM observation
  27. GRB 130606B: AGILE-MCAL observation
  28. GRB 130606B: Swift-XRT observations
  29. Konus-Wind observation of GRB 130606B
  30. GRB 130606B; Fermi GBM observation
  31. GRB 130606B: Fermi-LAT detection of a bright hard burst
  32. GRB 130604B: Fermi GBM detection
  33. GRB 130528A: Fermi GBM detection
  34. GRB 130518A: Suzaku WAM observation of the prompt emission
  35. GRB 130515A: Suzaku WAM observation of the prompt emission
  36. GRB 130518A: 10.4m GTC/OSIRIS redshift
  37. GRB 130518A: Continued RATIR Optical Observations - Fading
  38. GRB 130518A: Confirmation of the X-ray afterglow.
  39. GRB 130518A: P60 Afterglow Observations
  40. GRB 130518A: RATIR Optical and NIR Observations
  41. GRB 130518A: Swift XRT and UVOT possible afterglow
  42. Konus-Wind observation of GRB 130518A
  43. GRB 130518A Swift-BAT position from ground analysis
  44. GRB 130518A: Fermi LAT detection
  45. GRB 130518A: Fermi GBM detection
  46. Konus-Wind observation of GRB 130515A
  47. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  48. GRB 130515A: Fermi GBM detection
  49. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  50. GRB 130504C: Swift-XRT afterglow confirmation
  51. GRB 130504C: Suzaku WAM observation of the prompt emission
  52. Refined IPN Triangulation of GRB 130502B
  53. GRB 130504C: further Swift-XRT observations
  54. Konus-Wind observation of GRB 130504C
  55. GRB 130504C: Swift-XRT observations
  56. GRB 130504C: Fermi GBM detection
  57. GRB 130504C: Fermi-LAT detection of a burst
  58. Konus-Wind observation of GRB 130504B
  59. IPN Triangulation of GRB 130504B
  60. GRB 130504B: Fermi GBM detection
  61. GRB 130502B: Suzaku WAM observation of the prompt emission
  62. GRB 130502B: Swift-XRT refined Analysis
  63. GRB 130427A: Non-observation of VHE emission with HAWC
  64. IPN Triangulation of GRB 130502B
  65. GRB 130502A: Fermi GBM detection
  66. Konus-Wind observation of GRB 130502B
  67. GRB 130502B: P60 Observations
  68. GRB 130502B Swift-XRT observations
  69. GRB 130502B: Fermi LAT Detection
  70. GRB 130502B: Fermi GBM detection of a burst
  71. GRB 130425A: Suzaku WAM observation of the prompt emission
  72. GRB 130427A: high energy gamma-ray detection by AGILE
  73. GRB 130427A: Fermi-LAT refined analysis
  74. GRB 130427A in the Ep,i - Eiso plane
  75. GRB 130425: MASTER-Net optical observations
  76. GRB 100728A: GROND host detection and X-shooter redshift
  77. Konus-Wind observation of GRB 130427A
  78. GRB 130427A: SPI-ACS/INTEGRAL observations
  79. GRB 130427A: Fermi GBM observation
  80. GRB 130427A: Fermi-LAT detection of a burst
  81. GRB 130427A: Swift-BAT refined analysis
  82. GRB 130427A: Swift detection of a very bright burst with a likely bright optical counterpart
  83. Konus-Wind observation of GRB 130425A
  84. IPN Triangulation of GRB 130425A
  85. GRB 130425A: Fermi GBM detection
  86. GRB 130420B: Fermi GBM observation
  87. GRB 130420A: Fermi GBM observation
  88. IPN Triangulation of GRB 130320B (very long/bright)
  89. Swift/XRT observation of GRB 130327B
  90. GRB 130310A: RATIR Observations
  91. Konus-Wind observation of GRB 130327B
  92. GRB 130327B: Fermi-LAT detection of a burst
  93. GRB 130327B: Fermi GBM detection
  94. GRB 130327B: gamma-ray detection by AGILE
  95. Konus-Wind observation of GRB 130325A
  96. GRB 130325A Tiled Swift observations
  97. GRB 130325A: Fermi LAT detection
  98. GRB 130325A: Fermi GBM detection
  99. GRB 130305A: optical upper limit in Mondy observatory
  100. Swift XRT observations of GRB 130310A

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