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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"

21918 results found.

  1. GRB 130625A: Swift-XRT refined Analysis
  2. GRB 130625A: MASTER afterglow limit
  3. GRB 130625A: Swift/UVOT Upper Limits
  4. GRB 130625A: Nanshan optical upper limit
  5. GRB 130623A: Swift-XRT and UVOT observations
  6. GRB 130625A: Enhanced Swift-XRT position
  7. GRB 130625A: Swift detection of a burst
  8. GRB 130614A: Suzaku WAM observation of the prompt emission
  9. Swift Trigger 558631 is not a real source
  10. GRB 130609B: Suzaku WAM observation of the prompt emission
  11. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  12. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408
  13. GRB 130615A: Continued Skynet/PROMPT Observations
  14. GRB 130610A: TAROT La Silla observatory optical observations
  15. GRB 130610A: CrAO optical observations
  16. GRB 130615A: Zadko observatory - Gingin optical observations
  17. GRB 130615A: TAROT La Silla observatory optical observations
  18. GRB 130614A: Fermi GBM detection
  19. GRB 130615A: Swift/UVOT Upper Limits
  20. GRB 130615A: Skynet/PROMPT Observations
  21. GRB 130615A: Enhanced Swift-XRT position
  22. GRB 130615A: GROND afterglow candidate
  23. GRB 130615A: Swift detection of a burst
  24. GRB 130606B: Suzaku WAM observation of the prompt emission
  25. GRB 130612A: ISON-NM optical observations
  26. GRB 130612A: MITSuME Okayama upper limits
  27. GRB 130612A: Swift/UVOT Detection
  28. GRB 130612A: Zadko observatory - Gingin optical observations
  29. GRB 130612A: Enhanced Swift-XRT position
  30. GRB 130612A: TAROT La Silla observatory optical observations
  31. GRB130612A OSN I-band observations
  32. GRB 130612A: RATIR Optical Observations
  33. GRB 130612A: P60 Observations
  34. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  35. GRB 130612A: PAIRITEL NIR Afterglow Observations
  36. GRB 130612A: Swift detection of a burst with an optical counterpart
  37. Konus-Wind observation of GRB 130610B
  38. GRB 130609A: Swift/UVOT Upper Limits
  39. GRB 130608A: Swift/UVOT Upper Limits
  40. GRB 130609B: GROND observations
  41. GRB 130606A: CrAO optical upper limit
  42. GRB 130608A: ISON-Kislovodsk optical upper limit
  43. GRB 130610A: ISON-NM optical observations
  44. GRB 130610A: Swift/UVOT Observations
  45. GRB 130609B: Swift/UVOT Observations
  46. Konus-Wind observation of GRB 130609B
  47. GRB 130606B: Swift/UVOT Upper Limit
  48. GRB 130610A: LOAO BVR Observation
  49. GRB 130610A: Enhanced Swift-XRT position
  50. GRB 130608A: Further Swift-BAT analysis
  51. GRB 130609B: Enhanced Swift-XRT position
  52. GRB 130610A: PAIRITEL NIR Afterglow Observations
  53. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  54. GRB 130610A: Swift detection of a burst with an optical counterpart
  55. GRB 130609B: Swift detection of a burst with an optical counterpart
  56. GRB 130609A: Fermi GBM observation
  57. GRB 130608A: RATIR Optical and NIR Observations
  58. GRB 130609A: Enhanced Swift-XRT position
  59. GRB 130608A: Swift-BAT refined analysis
  60. GRB 130608A: Enhanced Swift-XRT position
  61. GRB 130609A: RATIR Optical and NIR Observations
  62. GRB 130609A: P60 nondetection
  63. GRB130608A: BOOTES-2/TELMA upper limits
  64. GRB 130609A: Swift detection of a burst
  65. GRB 130608A: Swift detection of a burst
  66. GRB 130606A: Continued Skynet/PROMPT observations
  67. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  68. GRB 130606B: RATIR Optical and NIR Observations
  69. GRB 130606B: Swift-XRT observations
  70. GRB 130606A, Swift-BAT refined analysis
  71. GRB 130606A: TAROT Calern observatory early optical observations
  72. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  73. GRB 130606A: Swift/UVOT Upper Limits
  74. GRB 130603A: AAO optical observations
  75. GRB 130606A: Enhanced Swift-XRT position
  76. Konus-Wind observation of GRB 130605A
  77. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  78. GRB 130606A: AAO optical observations
  79. GRB 130606A: P60 Observations
  80. Konus-Wind observation of GRB 130606B
  81. GRB 130606A: PAIRITEL NIR Afterglow Observations
  82. GRB 130606A: RATIR r'-band Dropout
  83. GRB 130606A:T100 observations
  84. GRB 130606B: Fermi-LAT detection of a bright hard burst
  85. GRB130606A: Montarrenti Observatory afterglow detection
  86. Virtual Telescope observations of GRB 130606A
  87. GRB 130605A: Swift-XRT refined Analysis
  88. GRB 130605A: Swift-BAT refined analysis
  89. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  90. GRB 130606A: IRSF NIR Observation
  91. GRB 130606A: NOT afterglow detection
  92. GRB 130606A: Swift detection of a burst
  93. GRB 130605A: Swift/UVOT Detection
  94. GRB 130605A: Continued Skynet/PROMPT observations
  95. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  96. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  97. GRB 130605A: GROND afterglow candidate
  98. GRB 130605A: Swift detection of a burst
  99. GRB 130603B: AMI-LA 15GHz observations
  100. GRB 130604A: Swift/UVOT Upper Limits

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