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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"

32770 results found.

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

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