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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"

24478 results found.

  1. GRB 120911A: Swift detection of a burst
  2. GRB 120908A and GRB 120909A : Fermi/LAT upper limit
  3. GRB 120908A: Fermi GBM detection
  4. GRB 120909A: Fermi GBM observation
  5. Konus-Wind observation of GRB 120909A
  6. GRB 120909A: Swift-BAT refined analysis
  7. GRB 120909A: X-Shooter redshift 3.93
  8. GRB 120907A: Swift-XRT refined Analysis
  9. GRB 120907A: Fermi GBM detection
  10. GRB 120907A: Swift-BAT refined analysis
  11. GRB 120907A MASTER optical observations
  12. XMM observations of the short GRB120804A
  13. GRB 120830A: Fermi GBM observation
  14. Konus-Wind observation of GRB 120830A
  15. GRB 120830A: early MASTER optical limit
  16. IPN Triangulation of short GRB 120830A
  17. GRB 120830A: Fermi-LAT detection of a short burst
  18. Fermi trigger 368003226 : MASTER optical observations
  19. GRB 120821A: a long GRB detected by INTEGRAL
  20. GRB 120817B - PTF Observations
  21. GRB 120817B: BAT location in ground analysis and refined analysis
  22. GRB 120819A: MASTER final limits
  23. GRB 120819A: Swift-BAT refined analysis
  24. GRB 120819A: MITSuME Ishigakijima upper limits
  25. GRB 120819A: MITSuME Okayama Optical upper limits
  26. GRB 120819A: afterglow candidate from NOT
  27. GRB 120819A: MASTER optical observations
  28. GRB 120819A: Swift detection of a burst
  29. GRB 120816A: Swift/UVOT Detection of the Optical Afterglow
  30. GRB 120815A: MASTER-ICATE observations
  31. Konus-Wind observation of GRB 120816B
  32. IPN Triangulation of GRB 120816B (short/exceptionally intense)
  33. Konus-Wind observation of GRB 120817B
  34. GRB 120817B: LCO Optical Observations
  35. GRB 120817B: Fermi GBM detection
  36. IPN Triangulation of GRB 120817B (short/very intense)
  37. GRB 120817A: Swift-BAT refined analysis
  38. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  39. GRB 120817A: FTN and FTS observations
  40. GRB 120817A: Swift-XRT observations
  41. GRB 120817A: Swift detection of a burst
  42. GRB 120816A: Swift-BAT refined analysis
  43. GRB 120815A: Swift-BAT refined analysis
  44. GRB 120805A: Liverpool Telescope optical candidate detection
  45. GRB 120815A: Swift detection of a burst
  46. GRB 120811B: Fermi GBM observation
  47. GRB 120804A: Possible temporal break in the X-ray light-curve
  48. GCN for GRB 120811C
  49. GRB120804A: Chandra observations and afterglow detection
  50. GRB 120805A: optical afterglow confirmation from the NOT
  51. GRB 120811C: RTT150 optical observations
  52. GRB 120811C: MASTER-Tunka OT observations
  53. GRB 120811C: Swift-BAT refined analysis
  54. GRB 120811A: Swift-BAT refined analysis
  55. GRB 120811C: NOT redshift
  56. GRB 120811C: Redshift from OSIRIS/GTC
  57. GRB 120811C: MASTER-Amur observations of fading OT
  58. Konus-Wind observation of GRB 120811B
  59. IPN Triangulation of short hard GRB 120811B
  60. Swift Trigger 530581: GRB 120811A or a galactic transient
  61. GRB 120804A: Konus-Wind and Swift/BAT joint spectral analysis
  62. GRB 120802A: optical observations
  63. GRB 120807A: Fermi/LAT upper limit
  64. GRB 120807A: Swift-BAT refined analysis
  65. Fermi/GBM detection of an SGR-like burst
  66. Swift trigger 530214: uncertain if real or not
  67. Swift-BAT trigger 529813 is due to noise while entering the SAA
  68. GRB 120728A: Fermi GBM observation
  69. GRB 120805A: Swift-BAT refined analysis
  70. GRB 120802A: Swift/UVOT Upper Limits
  71. GRB 120805A: Swift detection of a burst
  72. GRB 120804A: MITSuME Okayama Optical upper limits
  73. GRB 120804A: Swift-BAT refined analysis
  74. GRB 120803B: MITSuME Okayama Optical upper limits
  75. GRB 120803A: MITSuME Okayama Optical upper limits
  76. GRB 120803B: Swift-BAT refined analysis
  77. GRB 120803B: MITSuME Akeno Optical upper limits
  78. GRB 120803A: Swift-XRT Observations
  79. GRB 120803A: Swift-BAT refined analysis
  80. GRB 120803B: FTN possible afterglow candidate
  81. GRB 120803B: Swift detection of a burst
  82. GRB 120803A: Swift detection of a possible burst
  83. GRB 120729A: Fermi GBM observation
  84. GRB 120802A: Swift-BAT refined analysis
  85. GRB 120802A: MASTER optical observations
  86. GRB 120728B: Fermi GBM detection
  87. Konus-Wind observation of GRB 120728B
  88. GRB 120729A: break in the optical light curve
  89. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  90. IPN Triangulation of GRB 120728B (long/intense)
  91. GRB 120729A: Early RAPTOR Observations
  92. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  93. GRB 120729A: Xinglong TNT optical upper limit
  94. GRB 120729A, Swift-BAT refined analysis
  95. GRB 120728A, Swift-BAT refined analysis
  96. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  97. GRB 120728A: Swift-XRT refined Analysis
  98. GRB 120728A: GROND observations
  99. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  100. Swift Trigger 528925 is probably a noise fluctuation

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