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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"

14946 results found.

  1. GRB 110422A: Swift detection of a burst
  2. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  3. GRB 110420B: Swift-XRT afterglow candidate
  4. GRB 110420B: Swift detection of a short hard burst
  5. GRB 110420A: Swift detection of a burst with optical counterpart
  6. GRB 110414A: GROND upper limits
  7. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  8. GRB 110414A: Swift detection of a burst
  9. GRB 110412A: Swift detection of a burst
  10. GRB 110411A: Swift detection of a burst
  11. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  12. GRB 110407A: GROND Detection of the Optical Afterglow
  13. GRB 110407A: NOT optical observations
  14. GRB 110407A : Lulin optical afterglow detection
  15. GRB 110407A: Swift detection of a burst
  16. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  17. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  18. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  19. GRB 110401A: Fermi GBM detection
  20. GRB 110402A: Fermi GBM detection
  21. GRB 110402A afterglow observation
  22. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  23. GRB 110402A: Swift/UVOT detection of afterglow candidate
  24. GRB 110402A: Swift detection of a burst
  25. GRB 110328A / Swift J164449.3+57345: Correction to GCN 11850
  26. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  27. GRB 110328A / Swift J164449.3+573451: CARMA mm detection
  28. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  29. GRB 110328B: Fermi-LAT Detection
  30. GRB 110328B: Fermi GBM detection
  31. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  32. GRB 110328A: Swift detection of a burst
  33. GRB 110319B Swift-XRT afterglow confirmation
  34. GRB 101225A: revised analysis of narrow band imaging
  35. GRB 110319A: Swift/UVOT Detection
  36. GRB 110319A: Swift detection of a burst
  37. GRB 110318A: Fermi GBM detection
  38. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  39. GRB 110318B: Swift detection of a burst
  40. GRB 110318A: Swift detection of a burst
  41. GRB 110315A: Swift detection of a burst
  42. GRB 110312A: Swift detection of a burst
  43. GRB 110305A: REM detection of a possible NIR afterglow
  44. GRB 110305A: GROND Detection of Optical Afterglow
  45. GRB 110305A: Swift detection of a burst
  46. GRB 110301A: Fermi GBM detection
  47. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  48. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  49. GRB 110223A: Observations from BOOTES-2
  50. GRB 110223B: Swift detection of a burst
  51. GRB 110223A: Swift detection of a burst
  52. Fermi GBM detection of an SGR-like burst
  53. Swift XRT and UVOT Observations of OT 110215
  54. OT 110215: possible GRB from 2MASS J00264184+8324093
  55. GRB 110213B: Gemini South Redshift
  56. GRB 110210A: ROVOR Upper Limit
  57. GRB 110213B: MAXI/GSC detection of a probable GRB
  58. GRB 110213A: Bok Telescope Redshift
  59. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  60. GRB 110213A: P60 Optical Afterglow Detection
  61. GRB 110213A: Swift detection of a burst with optical afterglow
  62. GRB 110212A: Swift detection of a burst
  63. GRB 110205A: detection of optical linear polarization from CAHA
  64. GRB 110210A: Swift detection of a burst
  65. Fermi GBM detection of a burst from 1E 1841-045
  66. GRB 110208A: Swift detection of a burst
  67. GRB 110206A: GROND detection of afterglow candidate
  68. GRB 110206A: UVOT detection of afterglow candidate
  69. Konus-Wind observation of GRB 110205A
  70. GRB 110207A: Swift detection of a burst
  71. GRB 110206A: Swift detection of a probable X-ray afterglow
  72. GRB 110205A: FAST Redshift
  73. GRB 110205A: PAIRITEL NIR Afterglow Detection
  74. GRB 110205A: TAROT Calern observatory detection of an optical flare
  75. GRB 110205A: TAROT Calern observatory optical detection
  76. GRB 110205A: Swift detection of a burst with an optical candidate
  77. GRB 110128A: Fermi GBM detection
  78. GRB 110201A: Swift detection of a burst
  79. GRB 110125A: Fermi GBM detection
  80. GRB110128A: TNG NIR observations
  81. GRB 110128A: TAROT-Calern refined analysis
  82. GRB 110128A: Swift/UVOT observations
  83. GRB 110128A: Afterglow detection from NOT
  84. GRB 110128A: Swift detection of a burst
  85. GRB 110123A: Fermi GBM detection
  86. GRB 110120A: Fermi LAT detection
  87. GRB 110119A: Fermi GBM detection
  88. GRB 110120A: Fermi GBM detection
  89. GRB110119: Swift/UVOT Detection
  90. GRB 110119A: PAIRITEL NIR Afterglow Detection
  91. GRB 110119A: Swift detection of a burst with an optical detection
  92. GRB 101219B: tentative redshift and spectroscopic supernova detection
  93. GRB 101219B: GROND detection of a SN signature
  94. Swift-BAT Trigger 442539 is not a GRB
  95. Swift Trigger 442539 is probably not a GRB
  96. GRB 110107A: Swift-XRT afterglow confirmation
  97. GRB 110112B: A short GRB detected by INTEGRAL
  98. GRB 110112A: Swift detection of a possible short burst
  99. GRB 101219b. Possible radio afterglow detection.
  100. GRB 110106B: Fermi GBM detection

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