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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"

32565 results found.

  1. GRB 100424A: NIR Afterglow Confirmation
  2. GRB 100425A: Swift XRT refined analysis
  3. GRB 100424A: Gemini/NIRI H-band observations
  4. GRB100425A: Swift/UVOT Upper Limits
  5. GRB 100424A: Swift/UVOT Upper Limits
  6. GRB 100424A: Liverpool Telescope Upper Limits
  7. GRB 100425A: Swift-BAT refined analysis
  8. GRB 100425A: VLT/X-shooter redshift
  9. GRB 100425A: GROND afterglow observation
  10. GRB 100424A: Gemini/NIRI Candidate Afterglow
  11. GRB 100425A: candidate optical afterglow from the VLT
  12. GRB100423A: MITSuME optical upper limits
  13. GRB 100424A : Lulin early z'-band upper limit
  14. GRB 100424A: GROND Upper Limits
  15. GRB 100424A: PAIRITEL NIR Upper Limits
  16. GRB 100424A: Swift-XRT refined analysis
  17. GRB 100424A: WHT z-band observations
  18. GRB 100424A: NOT optical observations
  19. GRB 100424A, Swift-BAT refined analysis
  20. GRB 100424A: Prompt enhanced Swift-XRT position.
  21. GRB 100420A: GRT Optical Observation
  22. Swift-BAT refined analysis of trigger 420256
  23. GRB 100420A: Swift-BAT refined analysis
  24. GRB 100423A: Swift-BAT refined analysis
  25. Swift Trigger 420256: ROTSE-III Optical Limits
  26. GRB 100423A: Skynet/PROMPT Detections
  27. GRB 100423A: GROND discovery of afterglow
  28. Radio afterglow detection of GRB 100418A with the EVLA
  29. GRB 100414A: Radio Afterglow Detection with the Expanded VLA
  30. GRB 100418A: Continued PAIRITEL NIR Observations
  31. GRB 100418A: WSRT Radio Detection
  32. GRB100418A: REM possible afterglow detection
  33. GRB 100418A: Continuing Swift/UVOT Observations
  34. GRB 100418A: further GROND observations and light curve fit
  35. GRB 100418A: RTT150 optical observations
  36. GRB100420A: MITSuME optical upper limits
  37. GRB 100420A: Swift/UVOT Upper Limits
  38. GRB 100420A: XRT refined analysis
  39. GRB 100418A: SARA second epoch
  40. GRB 100420A: SARA Upper Limits
  41. GRB 100418A: RTT150 observations during the optical afterglow maximum
  42. GRB 100418A: optical observations
  43. GRB 100418A: MASTER-Net optical observations
  44. GRB 100414A: Confirmation of the X-ray afterglow
  45. GRB 100418A: VLT optical observations
  46. GRB 100420A: ROTSE-III Optical Limits
  47. GRB 100418A PAIRITEL NIR Observations
  48. GRB 100418A: ROVOR optical afterglow detection
  49. GRB 100418A: Swift/UVOT Observations
  50. GRB 100418A: Gemini-N redshift confirmation
  51. GRB 100413A: GMRT observation of radio afterglow
  52. GRB 100418A: Swift-XRT Refined Analysis
  53. GRB 100418A: host galaxy detection in the SDSS
  54. GRB100418A: VLT/X-shooter redshift and photometry
  55. GRB 100418A: SARA observations
  56. GRB100414A: SAO RAS optical observations
  57. GRB 100418A: GROND observations; missing author list added
  58. GRB 100418A: GROND observations
  59. GRB 100418A: Swift-BAT refined analysis
  60. GRB 100418A: ROTSE-III Optical Limits
  61. GRB 100413A: Radio Afterglow Detection with the EVLA
  62. GRB 100414A: Suzaku WAM observation of the prompt emission
  63. GRB 100414A: Swift/UVOT Observations
  64. GRB 100414A: Gemini-N observation (correction)
  65. GRB 100414A: GROND Detection of the Optical Afterglow
  66. GRB 100414A: Gemini-N candidate and redshift
  67. GRB 100413A: Suzaku WAM observation of the prompt emission
  68. GRB 100414A: Palomar Transient Factory Observations
  69. GRB 100413B: Swift Confirmation of Burst
  70. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  71. GRB 100413A: Swift-BAT final refined analysis
  72. GRB 100414A: IPN Localization
  73. Konus-Wind observation of GRB 100414A (correction to GCN 10597)
  74. Konus-Wind observation of GRB 100414B
  75. GRB 100413A: GROND Upper limits
  76. GRB 100413A: Swift/UVOT Upper Limits
  77. Konus-Wind observation of GRB 100413A
  78. GRB 100413A: Faulkes Telescope South observations
  79. Tentative redshift of GRB100413A from X-ray data
  80. GRB 100413A: SARA upper limit
  81. GRB 100413A: Swift-XRT Refined Analysis
  82. GRB 100413A: Swift-BAT initial refined analysis
  83. GRB 100413: xinglong TNT optical upper limit
  84. GRB 100413A: MASTER-Net optical observations
  85. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  86. Swift-BAT trigger 419015 is not astrophysical
  87. GRB100401A: GROND Upper Limits
  88. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  89. GRB 100331B: GROND Upper limits
  90. Master-Net observations on the Swift trigger on LS V +44 17
  91. GRB 100401A: Swift/UVOT Upper Limit
  92. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  93. GRB 100401A: Fermi GBM detection
  94. GRB 100331B: BOOTES-3 observations
  95. GRB 100316A: R-band limit
  96. GRB 100324B: Suzaku WAM observation of the prompt emission
  97. GRB 100331B: Swift/UVOT Upper Limits
  98. GRB 100331B: Swift/XRT possible afterglow candidate
  99. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  100. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source

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