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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"

11630 results found.

  1. GRB 130716A: Fermi GBM observation
  2. GRB 130702A : Xinglong TNT continue optical observation
  3. GRB 130715A: Fermi GBM detection
  4. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  5. GRB 130708A: Fermi GBM observation
  6. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  7. GRB 130708A found in ground analysis of Swift-BAT data
  8. GRB 130702A: Xinglong TNT optical observation
  9. GRB 130702A: VLA detection
  10. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  11. GRB 130702Ð
  12. Konus-Wind observation of GRB 130702A
  13. GRB 130702A: further TNG observations
  14. GRB 130702A: further Swift-XRT observations
  15. GRB 130702A: Continued P60 observations
  16. GRB 130702A: CARMA 3mm detection
  17. GRB 130702A: TNG optical observations
  18. GRB 130702A / Fermi394416326 : Nanshan optical observations
  19. IPN localization of GRB 130702A (= Fermi 394416326)
  20. Fermi GRB 130702A: Swift XRT and UVOT observations
  21. GRB 130702A / Fermi394416326: Fermi GBM detection
  22. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  23. Fermi GBM trigger 394416326: MASTER early optical limit
  24. GRB 130628A: Fermi GBM detection
  25. Fermi394416326: iPTF detection of a possible optical afterglow
  26. Fermi GBM trigger 394325281 / 130630950 is not a GRB
  27. GRB 130701B: Fermi GBM detection
  28. GRB 130627A: Fermi GBM detection
  29. GRB 130623A: Fermi GBM detection
  30. GRB 130623A detected in ground analysis of Swift-BAT data
  31. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  32. GRB 130614A: Fermi GBM detection
  33. GRB 130612A: Fermi GBM observation
  34. GRB 130606B: Suzaku WAM observation of the prompt emission
  35. Recent Fermi GBM particle triggers misclassified as GRBs
  36. GRB 130609B: Fermi GBM observation
  37. GRB 130610A: Fermi GBM Observation
  38. GRB 130606B: Swift/UVOT Upper Limit
  39. GRB 130609A: Fermi GBM observation
  40. GRB 130606B: AGILE-MCAL observation
  41. GRB 130606B: Swift-XRT observations
  42. Konus-Wind observation of GRB 130606B
  43. GRB 130606B; Fermi GBM observation
  44. GRB 130606B: Fermi-LAT detection of a bright hard burst
  45. GRB 130604B: Fermi GBM detection
  46. GRB 130528A: Fermi GBM detection
  47. GRB 130518A: Suzaku WAM observation of the prompt emission
  48. GRB 130515A: Suzaku WAM observation of the prompt emission
  49. GRB 130518A: 10.4m GTC/OSIRIS redshift
  50. GRB 130518A: Continued RATIR Optical Observations - Fading
  51. GRB 130518A: Confirmation of the X-ray afterglow.
  52. GRB 130518A: P60 Afterglow Observations
  53. GRB 130518A: RATIR Optical and NIR Observations
  54. GRB 130518A: Swift XRT and UVOT possible afterglow
  55. Konus-Wind observation of GRB 130518A
  56. GRB 130518A Swift-BAT position from ground analysis
  57. GRB 130518A: Fermi LAT detection
  58. GRB 130518A: Fermi GBM detection
  59. Konus-Wind observation of GRB 130515A
  60. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  61. GRB 130515A: Fermi GBM detection
  62. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  63. GRB 130504C: Swift-XRT afterglow confirmation
  64. GRB 130504C: Suzaku WAM observation of the prompt emission
  65. Refined IPN Triangulation of GRB 130502B
  66. GRB 130504C: further Swift-XRT observations
  67. Konus-Wind observation of GRB 130504C
  68. GRB 130504C: Swift-XRT observations
  69. GRB 130504C: Fermi GBM detection
  70. GRB 130504C: Fermi-LAT detection of a burst
  71. Konus-Wind observation of GRB 130504B
  72. IPN Triangulation of GRB 130504B
  73. GRB 130504B: Fermi GBM detection
  74. GRB 130502B: Suzaku WAM observation of the prompt emission
  75. GRB 130502B: Swift-XRT refined Analysis
  76. GRB 130427A: Non-observation of VHE emission with HAWC
  77. IPN Triangulation of GRB 130502B
  78. GRB 130502A: Fermi GBM detection
  79. Konus-Wind observation of GRB 130502B
  80. GRB 130502B: P60 Observations
  81. GRB 130502B Swift-XRT observations
  82. GRB 130502B: Fermi LAT Detection
  83. GRB 130502B: Fermi GBM detection of a burst
  84. GRB 130425A: Suzaku WAM observation of the prompt emission
  85. GRB 130427A: high energy gamma-ray detection by AGILE
  86. GRB 130427A: Fermi-LAT refined analysis
  87. GRB 130427A in the Ep,i - Eiso plane
  88. GRB 130425: MASTER-Net optical observations
  89. GRB 100728A: GROND host detection and X-shooter redshift
  90. Konus-Wind observation of GRB 130427A
  91. GRB 130427A: SPI-ACS/INTEGRAL observations
  92. GRB 130427A: Fermi GBM observation
  93. GRB 130427A: Fermi-LAT detection of a burst
  94. GRB 130427A: Swift-BAT refined analysis
  95. GRB 130427A: Swift detection of a very bright burst with a likely bright optical counterpart
  96. Konus-Wind observation of GRB 130425A
  97. IPN Triangulation of GRB 130425A
  98. GRB 130425A: Fermi GBM detection
  99. GRB 130420B: Fermi GBM observation
  100. GRB 130420A: Fermi GBM observation

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