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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"

24488 results found.

  1. GRB 120911B: Fermi GBM observation
  2. GRB 120911B: Fermi-LAT detection of a burst
  3. IPN Triangulation of GRB 120911B (long/bright)
  4. GRB 120911A: Fermi GBM observation
  5. GRB120911A: MITSuME Okayama Optical upper limits
  6. GRB 120911A: Fermi/LAT upper limit
  7. GRB 120911A: Swift-BAT refined analysis
  8. GRB 120911A: Faulkes Telescope North observations
  9. GRB 120911A: Swift-XRT observations
  10. GRB 120911A: ROTSE-III Optical Limits
  11. GRB 120911A: Swift detection of a burst
  12. GRB 120908A and GRB 120909A : Fermi/LAT upper limit
  13. GRB 120908A: Fermi GBM detection
  14. GRB 120909A: Fermi GBM observation
  15. Konus-Wind observation of GRB 120909A
  16. GRB 120909A: Swift-BAT refined analysis
  17. GRB 120909A: X-Shooter redshift 3.93
  18. GRB 120907A: Swift-XRT refined Analysis
  19. GRB 120907A: Fermi GBM detection
  20. GRB 120907A: Swift-BAT refined analysis
  21. GRB 120907A MASTER optical observations
  22. XMM observations of the short GRB120804A
  23. GRB 120830A: Fermi GBM observation
  24. Konus-Wind observation of GRB 120830A
  25. GRB 120830A: early MASTER optical limit
  26. IPN Triangulation of short GRB 120830A
  27. GRB 120830A: Fermi-LAT detection of a short burst
  28. Fermi trigger 368003226 : MASTER optical observations
  29. GRB 120821A: a long GRB detected by INTEGRAL
  30. GRB 120817B - PTF Observations
  31. GRB 120817B: BAT location in ground analysis and refined analysis
  32. GRB 120819A: MASTER final limits
  33. GRB 120819A: Swift-BAT refined analysis
  34. GRB 120819A: MITSuME Ishigakijima upper limits
  35. GRB 120819A: MITSuME Okayama Optical upper limits
  36. GRB 120819A: afterglow candidate from NOT
  37. GRB 120819A: MASTER optical observations
  38. GRB 120819A: Swift detection of a burst
  39. GRB 120816A: Swift/UVOT Detection of the Optical Afterglow
  40. GRB 120815A: MASTER-ICATE observations
  41. Konus-Wind observation of GRB 120816B
  42. IPN Triangulation of GRB 120816B (short/exceptionally intense)
  43. Konus-Wind observation of GRB 120817B
  44. GRB 120817B: LCO Optical Observations
  45. GRB 120817B: Fermi GBM detection
  46. IPN Triangulation of GRB 120817B (short/very intense)
  47. GRB 120817A: Swift-BAT refined analysis
  48. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  49. GRB 120817A: FTN and FTS observations
  50. GRB 120817A: Swift-XRT observations
  51. GRB 120817A: Swift detection of a burst
  52. GRB 120816A: Swift-BAT refined analysis
  53. GRB 120815A: Swift-BAT refined analysis
  54. GRB 120805A: Liverpool Telescope optical candidate detection
  55. GRB 120815A: Swift detection of a burst
  56. GRB 120811B: Fermi GBM observation
  57. GRB 120804A: Possible temporal break in the X-ray light-curve
  58. GCN for GRB 120811C
  59. GRB120804A: Chandra observations and afterglow detection
  60. GRB 120805A: optical afterglow confirmation from the NOT
  61. GRB 120811C: RTT150 optical observations
  62. GRB 120811C: MASTER-Tunka OT observations
  63. GRB 120811C: Swift-BAT refined analysis
  64. GRB 120811A: Swift-BAT refined analysis
  65. GRB 120811C: NOT redshift
  66. GRB 120811C: Redshift from OSIRIS/GTC
  67. GRB 120811C: MASTER-Amur observations of fading OT
  68. Konus-Wind observation of GRB 120811B
  69. IPN Triangulation of short hard GRB 120811B
  70. Swift Trigger 530581: GRB 120811A or a galactic transient
  71. GRB 120804A: Konus-Wind and Swift/BAT joint spectral analysis
  72. GRB 120802A: optical observations
  73. GRB 120807A: Fermi/LAT upper limit
  74. GRB 120807A: Swift-BAT refined analysis
  75. Fermi/GBM detection of an SGR-like burst
  76. Swift trigger 530214: uncertain if real or not
  77. Swift-BAT trigger 529813 is due to noise while entering the SAA
  78. GRB 120728A: Fermi GBM observation
  79. GRB 120805A: Swift-BAT refined analysis
  80. GRB 120802A: Swift/UVOT Upper Limits
  81. GRB 120805A: Swift detection of a burst
  82. GRB 120804A: MITSuME Okayama Optical upper limits
  83. GRB 120804A: Swift-BAT refined analysis
  84. GRB 120803B: MITSuME Okayama Optical upper limits
  85. GRB 120803A: MITSuME Okayama Optical upper limits
  86. GRB 120803B: Swift-BAT refined analysis
  87. GRB 120803B: MITSuME Akeno Optical upper limits
  88. GRB 120803A: Swift-XRT Observations
  89. GRB 120803A: Swift-BAT refined analysis
  90. GRB 120803B: FTN possible afterglow candidate
  91. GRB 120803B: Swift detection of a burst
  92. GRB 120803A: Swift detection of a possible burst
  93. GRB 120729A: Fermi GBM observation
  94. GRB 120802A: Swift-BAT refined analysis
  95. GRB 120802A: MASTER optical observations
  96. GRB 120728B: Fermi GBM detection
  97. Konus-Wind observation of GRB 120728B
  98. GRB 120729A: break in the optical light curve
  99. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  100. IPN Triangulation of GRB 120728B (long/intense)

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