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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"

42531 results found.

  1. GRB 130725B: Swift-XRT refined Analysis
  2. GRB130725B: REM-ROS2 optical observations
  3. GRB 130725B - UVOT-enhanced XRT position
  4. GRB 130725A: Swift/UVOT Upper Limits
  5. GRB 130725A - Faulkes Telescope South Observations
  6. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  7. GRB 130725A: MITSuME Ishigakijima Optical Observation
  8. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  9. GRB 130725A, Swift-BAT refined analysis
  10. GRB 130719A: Skynet/PROMPT observations
  11. GRB 130725B: Swift detection of a burst
  12. Swift Trigger 563980 is GRB 130725A
  13. Swift Trigger 563980 cannot be identified at this time.
  14. GRB 130702A in the Ep,i - Eiso plane
  15. Konus-Wind observation of GRB 130722A
  16. GRB 130722A: Swift/UVOT Detection
  17. GRB 130722A: MITSuME Okayama upper limits
  18. GRB 130722C Tiled Swift observations
  19. GRB 130722A: Enhanced Swift-XRT position
  20. GRB 130722A: Swift-XRT refined Analysis
  21. GRB 130722A: Skynet/GORT observations
  22. GRB 130719A, Swift-BAT refined analysis
  23. GRB 130722A: Faulkes Telescope South optical candidate
  24. GRB 130715A: Suzaku WAM observation of the prompt emission
  25. GRB 130722A: Swift detection of a burst
  26. GRB 130719A: Swift detection of a burst
  27. GRB 130716A: Fermi GBM observation
  28. GRB 130716A Swift-BAT Spectral lag analysis
  29. GRB 130702A : Xinglong TNT continue optical observation
  30. GRB 130716A: Gemini-North imaging
  31. GRB 130716A: UVOT Upper Limits
  32. GRB 130716A: Probable short-hard burst with delayed Swift data
  33. GRB 130715A: Fermi GBM detection
  34. GRB 130626A: Retraction of possible X-ray afterglow
  35. GRB 130702A: Maidanak optical observations
  36. GRB 130708A: Swift XRT and UVOT Observations
  37. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  38. GRB 130708A: Fermi GBM observation
  39. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  40. GRB 130708A found in ground analysis of Swift-BAT data
  41. GRB 130702A: Maidanak optical observations
  42. GRB 130628A: Suzaku WAM observation of the prompt emission
  43. GRB130702A: NOT observation - the detection of an emerging supernova
  44. GRB 130702A: Continued RATIR Optical and NIR Observations
  45. GRB 130702A: Xinglong TNT optical observation
  46. GRB 130702A: Continued UVOT Observations
  47. GRB 130702A: VLA detection
  48. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  49. GRB 130702Ð
  50. GRB 130702A: WSRT radio detection
  51. Konus-Wind observation of GRB 130702A
  52. GRB130702A: Redshift of Afterglow Candidate iPTF13bxl
  53. GRB 130702A: further TNG observations
  54. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  55. GRB 130702A: further Swift-XRT observations
  56. GRB 130702A: Continued P60 observations
  57. GRB 130702A: RATIR Optical and NIR Observations
  58. GRB 130702A: CARMA 3mm detection
  59. GRB 130702A: NOT optical observations
  60. GRB 130702A: TNG optical observations
  61. GRB 130702A / Fermi394416326 : Nanshan optical observations
  62. IPN localization of GRB 130702A (= Fermi 394416326)
  63. Fermi GRB 130702A: Swift XRT and UVOT observations
  64. GRB 130702A / Fermi394416326: Fermi GBM detection
  65. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  66. Fermi GBM trigger 394416326: MASTER early optical limit
  67. GRB 130628A: Fermi GBM detection
  68. Fermi394416326: FTN detection
  69. Fermi394416326: iPTF detection of a possible optical afterglow
  70. GRB 130627B: Swift afterglow confirmation
  71. GRB 130623A: Second Swift-XRT observation
  72. GRB 130701A: MITSuME Akeno Optical observation
  73. GRB 130701B: Fermi GBM detection
  74. GRB 130701A: Swift-XRT refined Analysis
  75. GRB 130701A: P60 Observations
  76. GRB 130701A, Swift-BAT refined analysis
  77. Konus-Wind observation of GRB 130701A
  78. GRB 130701A: Swift/UVOT Detection
  79. GRB 130701A: VLT/X-shooter redshift
  80. GRB 130701A: Enhanced Swift-XRT position
  81. GRB 130701A: optical afterglow from the NOT
  82. GRB 130701A: Swift detection of a burst
  83. GRB 130627B, Swift-BAT refined analysis
  84. GRB 130627A, Swift-BAT refined analysis
  85. GRB 130627B: Swift/UVOT Upper Limits
  86. GRB 130627A: Swift/UVOT Upper Limits
  87. GRB 130627A: Swift-XRT refined Analysis
  88. GRB 130627B: Possible Swift-XRT afterglow detection
  89. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  90. GRB 130627A: Enhanced Swift-XRT position
  91. GRB 130626A: KAIT Optical Observations
  92. GRB 130626A: RATIR Optical Observations
  93. GRB 130626A, Swift-BAT refined analysis
  94. GRB 130627A: Fermi GBM detection
  95. GRB 130623A: Fermi GBM detection
  96. GRB130627B: Swift/UVOT Observations
  97. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  98. GRB 130627B: Swift detection of a burst
  99. GRB 130627A: Swift-XRT observations
  100. GRB 130627A: Swift/UVOT Observation

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