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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"

14933 results found.

  1. GRB 110407A : Lulin optical afterglow detection
  2. GRB 110407A: Swift detection of a burst
  3. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  4. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  5. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  6. GRB 110401A: Fermi GBM detection
  7. GRB 110402A: Fermi GBM detection
  8. GRB 110402A afterglow observation
  9. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  10. GRB 110402A: Swift/UVOT detection of afterglow candidate
  11. GRB 110402A: Swift detection of a burst
  12. GRB 110328A / Swift J164449.3+57345: Correction to GCN 11850
  13. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  14. GRB 110328A / Swift J164449.3+573451: CARMA mm detection
  15. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  16. GRB 110328B: Fermi-LAT Detection
  17. GRB 110328B: Fermi GBM detection
  18. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  19. GRB 110328A: Swift detection of a burst
  20. GRB 110319B Swift-XRT afterglow confirmation
  21. GRB 101225A: revised analysis of narrow band imaging
  22. GRB 110319A: Swift/UVOT Detection
  23. GRB 110319A: Swift detection of a burst
  24. GRB 110318A: Fermi GBM detection
  25. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  26. GRB 110318B: Swift detection of a burst
  27. GRB 110318A: Swift detection of a burst
  28. GRB 110315A: Swift detection of a burst
  29. GRB 110312A: Swift detection of a burst
  30. GRB 110305A: REM detection of a possible NIR afterglow
  31. GRB 110305A: GROND Detection of Optical Afterglow
  32. GRB 110305A: Swift detection of a burst
  33. GRB 110301A: Fermi GBM detection
  34. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  35. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  36. GRB 110223A: Observations from BOOTES-2
  37. GRB 110223B: Swift detection of a burst
  38. GRB 110223A: Swift detection of a burst
  39. Fermi GBM detection of an SGR-like burst
  40. Swift XRT and UVOT Observations of OT 110215
  41. OT 110215: possible GRB from 2MASS J00264184+8324093
  42. GRB 110213B: Gemini South Redshift
  43. GRB 110210A: ROVOR Upper Limit
  44. GRB 110213B: MAXI/GSC detection of a probable GRB
  45. GRB 110213A: Bok Telescope Redshift
  46. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  47. GRB 110213A: P60 Optical Afterglow Detection
  48. GRB 110213A: Swift detection of a burst with optical afterglow
  49. GRB 110212A: Swift detection of a burst
  50. GRB 110205A: detection of optical linear polarization from CAHA
  51. GRB 110210A: Swift detection of a burst
  52. Fermi GBM detection of a burst from 1E 1841-045
  53. GRB 110208A: Swift detection of a burst
  54. GRB 110206A: GROND detection of afterglow candidate
  55. GRB 110206A: UVOT detection of afterglow candidate
  56. Konus-Wind observation of GRB 110205A
  57. GRB 110207A: Swift detection of a burst
  58. GRB 110206A: Swift detection of a probable X-ray afterglow
  59. GRB 110205A: FAST Redshift
  60. GRB 110205A: PAIRITEL NIR Afterglow Detection
  61. GRB 110205A: TAROT Calern observatory detection of an optical flare
  62. GRB 110205A: TAROT Calern observatory optical detection
  63. GRB 110205A: Swift detection of a burst with an optical candidate
  64. GRB 110128A: Fermi GBM detection
  65. GRB 110201A: Swift detection of a burst
  66. GRB 110125A: Fermi GBM detection
  67. GRB110128A: TNG NIR observations
  68. GRB 110128A: TAROT-Calern refined analysis
  69. GRB 110128A: Swift/UVOT observations
  70. GRB 110128A: Afterglow detection from NOT
  71. GRB 110128A: Swift detection of a burst
  72. GRB 110123A: Fermi GBM detection
  73. GRB 110120A: Fermi LAT detection
  74. GRB 110119A: Fermi GBM detection
  75. GRB 110120A: Fermi GBM detection
  76. GRB110119: Swift/UVOT Detection
  77. GRB 110119A: PAIRITEL NIR Afterglow Detection
  78. GRB 110119A: Swift detection of a burst with an optical detection
  79. GRB 101219B: tentative redshift and spectroscopic supernova detection
  80. GRB 101219B: GROND detection of a SN signature
  81. Swift-BAT Trigger 442539 is not a GRB
  82. Swift Trigger 442539 is probably not a GRB
  83. GRB 110107A: Swift-XRT afterglow confirmation
  84. GRB 110112B: A short GRB detected by INTEGRAL
  85. GRB 110112A: Swift detection of a possible short burst
  86. GRB 101219b. Possible radio afterglow detection.
  87. GRB 110106B: Fermi GBM detection
  88. GRB 110106B: Gemini-North / WHT detection of a fading afterglow
  89. GRB 110106B: Liverpool Telescope observations
  90. GRB 110106B: Swift detection of a burst
  91. GRB 110106A: Swift detection of a burst
  92. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  93. GRB110102A: Swift/UVOT observations
  94. GRB 110102A: Swift detection of a burst with an optical detection
  95. GRB 101225A: MAXI/GSC observations
  96. GRB 101225A Late-time emission observed by Swift-BAT
  97. GRB 101225A: WHT observations
  98. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  99. GRB 101225A: Swift/UVOT Detection
  100. Trigger 441015: Swift detection of a possible burst or transient

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