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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"

15360 results found.

  1. GRB 120913B: FRAM early follow up and detection
  2. Konus-Wind observation of GRB 120911B
  3. GRB 120911B: Fermi-LAT detection of a burst
  4. GRB 120911A: Fermi GBM observation
  5. GRB 120911A: Fermi/LAT upper limit
  6. GRB 120908A and GRB 120909A : Fermi/LAT upper limit
  7. GRB 120908A: Fermi GBM detection
  8. GRB 120909A: TAROT La Silla observatory optical observations
  9. GRB 120909A: Pi of the Sky upper limits
  10. GRB 120909A: Fermi GBM observation
  11. Konus-Wind observation of GRB 120909A
  12. GRB 120909A: GROND detection of the afterglow
  13. GRB 120907A: Fermi GBM detection
  14. GRB 120907A: ROTSE-III Optical Limits
  15. GRB 120802A: optical observations in CrAO
  16. GRB 120830A: Further Swift Observations
  17. GRB 120830A: Fermi GBM observation
  18. Konus-Wind observation of GRB 120830A
  19. IPN Triangulation of short GRB 120830A
  20. GRB 120830A: Fermi-LAT detection of a short burst
  21. GRB 120819A: MASTER final limits
  22. GRB 120819A: MITSuME Ishigakijima upper limits
  23. GRB 120819A: MITSuME Okayama Optical upper limits
  24. GRB 120816A: Swift/UVOT Detection of the Optical Afterglow
  25. Konus-Wind observation of GRB 120816B
  26. Konus-Wind observation of GRB 120817B
  27. GRB 120817B: Fermi GBM detection
  28. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  29. GRB 120816A: BOOTES-2 observations
  30. GRB 120805A: Liverpool Telescope optical candidate detection
  31. GRB 120815A: VLT/X-shooter redshift
  32. GRB 120811B: Fermi GBM observation
  33. GCN for GRB 120811C
  34. GRB120804A: Chandra observations and afterglow detection
  35. GRB 120805A: Enhanced Swift-XRT position
  36. GRB 120811C: Swift/UVOT Detection
  37. GRB 120811C: MASTER-Amur observations of fading OT
  38. Konus-Wind observation of GRB 120811B
  39. GRB 120803A: Confirmation of the X-ray afterglow
  40. GRB 120804A: Konus-Wind and Swift/BAT joint spectral analysis
  41. GRB 120807A: Fermi/LAT upper limit
  42. Fermi/GBM detection of an SGR-like burst
  43. Swift-BAT trigger 529813 is due to noise while entering the SAA
  44. GRB 120728A: Fermi GBM observation
  45. GRB 120804A: GROND upper limits
  46. GRB 120803B: MITSuME Okayama Optical upper limits
  47. GRB 120728B: Fermi GBM detection
  48. Konus-Wind observation of GRB 120728B
  49. GRB 120729A: break in the optical light curve
  50. GRB 120729A: UKIRT Observation
  51. T100 observations of GRB 120729A
  52. GRB 120729A: Swift/UVOT Detection
  53. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  54. GRB 120728A: GROND observations
  55. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  56. GRB 120724A: optical observation in Maidanak observatory
  57. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  58. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  59. GRB 120722A: Correction for GCN circ.13500
  60. GRB 120716A: Fermi GBM observation
  61. GRB 120716A: Swift-XRT detection
  62. GRB 120716A: Redshift confirmation from VLT/X-shooter
  63. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  64. GRB 120716A: Optical decay from NOT
  65. Konus-Wind observation of GRB 120716A
  66. GRB 120714B: Swift/UVOT Detection
  67. GRB 120714B: GROND confirmation of fading afterglow
  68. GRB 120714B: Position Correction and Candidate Optical Afterglow
  69. GRB 120711A: INTEGRAL/SPI observations
  70. GRB 120712A: Swift/UVOT Detection
  71. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  72. GRB 120711A: Fermi LAT Detection
  73. Konus-Wind observation of GRB 120711A
  74. GRB 120711A Gemini-S likely redshift
  75. Konus-Wind observation of GRB 120709A
  76. GRB 120711A: REM NIR early time detection
  77. GRB 120711A: MAXI/GSC detection
  78. GRB 120711A: an bright long GRB detected with INTEGRAL
  79. GRB 120709A: Fermi GBM detection
  80. GRB 120709A: Matched filter analysis of Fermi-LAT data
  81. Konus-Wind observation of GRB 120707A
  82. GRB 120709A: Fermi-LAT Detection
  83. GRB 120624B Suzaku WAM observation of the prompt emission
  84. Konus-Wind observation of GRB 120703A
  85. GRB120624B: Chandra observations and afterglow detection
  86. GRB 120624B Further Swift-XRT analysis
  87. GRB 120624B: Swift/UVOT Upper Limits
  88. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  89. GRB 120624B: Further analysis of the HAWKI observations
  90. GRB 120624B: Swift-XRT observations
  91. XRF 120626B: MAXI/GSC detection
  92. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  93. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  94. Konus-Wind observation of GRB 120624B
  95. GRB 120624A: Fermi GBM observation
  96. GRB 120624B: Fermi-LAT Detection
  97. Konus-Wind observation of GRB 120624A
  98. GRB 120624B: Fermi GBM detection
  99. Swift trigger 524642 / SwJ1910.2-0546
  100. GRB 120602A: Suzaku WAM observation of the prompt emission

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