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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"

43110 results found.

  1. GRB 120811C: EVLA Observations
  2. GRB 120811C: RTT150 optical observations
  3. GRB 120811C: MASTER-Tunka OT observations
  4. GRB 120811C: Swift-BAT refined analysis
  5. GRB 120811A: Swift-BAT refined analysis
  6. GRB 120811C: Bassano Bresciano Observatory optical observations
  7. GRB 120811C: Swift-XRT refined Analysis
  8. GRB 120811C: Swift/UVOT Detection
  9. GRB 120811C: Redshift from OSIRIS/GTC
  10. Improved IPN error box for short hard GRB 120811B
  11. GRB 120811C: RTT150 optical observations
  12. GRB 120811C: Enhanced Swift-XRT position
  13. GRB 120811C: TAROT Calern observatory optical observations
  14. GRB 120811C: MASTER-Amur observations of fading OT
  15. GRB 120811C: Swift detection of a burst with an optical counterpart
  16. Konus-Wind observation of GRB 120811B
  17. IPN Triangulation of short hard GRB 120811B
  18. Trigger 530588: Swift detection of XMM J174457-2850.3
  19. Swift Trigger 530581: GRB 120811A or a galactic transient
  20. GRB 120807A: Swift/UVOT Upper Limits
  21. GRB 120803A: Confirmation of the X-ray afterglow
  22. GRB 120804A: Konus-Wind and Swift/BAT joint spectral analysis
  23. GRB 120714B: GROND/FORS2 detection of a supernova
  24. Swift Trigger 530441 is a false trigger
  25. GRB 120804A: ATCA 34GHz upper limit
  26. GRB 120807A: Swift-XRT refined Analysis
  27. GRB 120802A: optical observations
  28. GRB 120807A: Fermi/LAT upper limit
  29. GRB 120807A: RAPTOR Limits During Gamma-Ray Emitting Interval
  30. GRB 120804A: Gemini-North detection of an optical afterglow and putative host galaxy
  31. GRB 120807A: TAROT La Silla observatory optical observations
  32. GRB 120807A: Swift-BAT refined analysis
  33. GRB 120807A: Enhanced Swift-XRT position
  34. GRB 120807A: Swift detection of a burst
  35. GRB 120804A: ATCA 34GHz upper limit
  36. Fermi/GBM detection of an SGR-like burst
  37. Swift-BAT trigger 530214 is noise
  38. GRB 120805A: Swift/UVOT Upper Limits
  39. Swift trigger 530214: uncertain if real or not
  40. Swift-BAT trigger 529813 is due to noise while entering the SAA
  41. GRB 120728A: Fermi GBM observation
  42. GRB 120805A: Swift-BAT refined analysis
  43. GRB 120802A: Swift/UVOT Upper Limits
  44. GRB 120805A: Swift-XRT refined Analysis
  45. GRB120805A: Liverpool Telescope observations
  46. GRB 120805A: TAROT Calern observatory optical observations
  47. GRB 120805A: Swift detection of a burst
  48. GRB 120804A: Gemini-North observations
  49. GRB 120804A: Swift-BAT Spectral lag analysis
  50. GRB 120804A: MITSuME Okayama Optical upper limits
  51. GRB 120803B: Swift-XRT refined Analysis
  52. GRB 120804A: Swift/UVOT Upper Limits
  53. GRB 120804A: Swift-BAT refined analysis
  54. GRB 120804A: Swift-XRT refined Analysis
  55. GRB 120804A: GROND upper limits
  56. GRB 120802A: EVLA Observations
  57. GRB 120804A: Enhanced Swift-XRT position
  58. Erratum of subject line of GCN13570 (GRB 120803A => GRB 120803B)
  59. GRB 120803B: MITSuME Okayama Optical upper limits
  60. GRB 120803A: MITSuME Okayama Optical upper limits
  61. GRB 120804A: Swift detection of a short burst
  62. GRB 120803B: Swift-BAT refined analysis
  63. GRB 120803B: Enhanced Swift-XRT position
  64. GRB 120803B: MITSuME Akeno Optical upper limits
  65. GRB 120803A: Swift-XRT Observations
  66. GRB 120803A: Swift-BAT refined analysis
  67. GRB 120803B: FTN possible afterglow candidate
  68. GRB 120803B: Swift detection of a burst
  69. GRB 120803A: Swift detection of a possible burst
  70. GRB 120802A: GRT Optical Observation
  71. GRB 120802A: Swift-XRT refined Analysis
  72. GRB 120802A Gemini-N redshift
  73. GRB 120802A: APEX/LABOCA submm observations
  74. GRB 120729A: Fermi GBM observation
  75. GRB 120802A: Swift-BAT refined analysis
  76. GRB 120802A: Enhanced Swift-XRT position
  77. GRB 120802A: MASTER optical observations
  78. GRB 120802A: Swift detection of a burst
  79. GRB 120729A: JCMT SCUBA-2 sub-mm observation
  80. GRB 120728B: Fermi GBM detection
  81. Konus-Wind observation of GRB 120728B
  82. GRB 120729A: break in the optical light curve
  83. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  84. IPN Triangulation of GRB 120728B (long/intense)
  85. GRB 120729A: RTT150 optical observations
  86. GRB 120729A: EVLA Observations
  87. Virtual Telescope observations of GRB 120729A
  88. GRB 120729A: Early RAPTOR Observations
  89. GRB 120729A: UKIRT Observation
  90. T100 observations of GRB 120729A
  91. GRB 120728A: GROND Afterglow discovery
  92. GRB 120729A: Swift-XRT refined Analysis
  93. Correction to Swift GCN Circular 13538
  94. GRB 120729A: Swift/UVOT Detection
  95. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  96. GRB 120729A, Swift-BAT refined analysis
  97. GRB 120729A: Enhanced Swift-XRT position
  98. GRB 120728A: Swift/UVOT Upper Limits
  99. GRB 120729A Gemini-N redshift
  100. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate

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