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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"

27636 results found.

  1. GRB 110610A: Swift-XRT refined Analysis
  2. GRB 110610A: Swift/UVOT Upper Limits
  3. GRB 110610A: Swift-BAT refined analysis
  4. Swift detection of the X-ray afterglow of GRB 110604A
  5. GRB 110610A: Swift detection of a burst
  6. Konus-Wind observation of GRB 110604A
  7. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  8. GRB 110530A: optical observations in Mondy observatory
  9. GRB 110530A: Swift-XRT refined Analysis
  10. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  11. GRB 110530A: Swift-BAT refined analysis
  12. GRB 110530A: MITSuME Akeno Optical Observation
  13. GRB 110529A: Fermi GBM detection
  14. GRB 110530A: Swift detection of a burst with an optical afterglow
  15. Konus-Wind observation of GRB 110529A
  16. LAT Observations of GRB110529A
  17. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  18. GRB 110521A: Swift/UVOT Upper Limits
  19. GRB 110521A: Swift-XRT refined analysis
  20. GRB 110521A: Swift-BAT refined analysis
  21. Swift/UVOT observations of GRB110520A
  22. GRB 110521A: Swift detection of a burst
  23. GRB 110520A: Swift-BAT refined analysis
  24. GRB 110520A: Swift-XRT refined Analysis
  25. GRB 110520A: Skynet/DAO optical observations
  26. GRB 110520A: Liverpool Telescope Observations
  27. GRB 110520A: TAROT Calern observatory optical observations
  28. GRB 110520A: MASTER-NET optical observations
  29. GRB 110520A: Swift detection of a burst
  30. IPN localization of bright GRB 110518A
  31. GRB 110519A, Swift-BAT refined analysis
  32. GRB 110519A: Swift detection of a burst
  33. GRB 110503A optical observation
  34. GRB 110426A: Fermi GBM detection
  35. GRB 110428A: Fermi-GBM observation
  36. GRB 110503A: TAROT Calern observatory optical observations
  37. GRB 110503A: Jet Break seen from TLS
  38. GRB 110503A optical observations
  39. Konus-Wind observation of GRB 110503A
  40. GRB 110503A: R-band Detection
  41. GRB 110503A: SARA-N Observations and Photometric Calibration
  42. GRB 110503A: Swift/UVOT Observations
  43. GRB 110503A: Swift-XRT refined Analysis
  44. GRB 110503A: PAIRITEL NIR Detection
  45. GRB 110503A - TLS Afterglow Observations
  46. GRB 110503A: Swift-BAT refined analysis
  47. GRB 110503A: NOT afterglow photometry
  48. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  49. GRB 110426A: Swift/XRT non-detection
  50. GRB 110428A: Fermi-LAT Detection
  51. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  52. GRB 110422A: Suzaku WAM observation of the prompt emission
  53. GRB110422A: NOT optical follow-ups
  54. Konus-Wind observation of GRB 110422A
  55. GRB 110422A: Further NOT observation
  56. GRB 110422A: Swift/UVOT Detection of optical afterglow
  57. GRB 110422A: Swift-XRT refined Analysis
  58. GRB 110422A: CQUEAN griz Observation
  59. GRB 110422A: THO optical observations
  60. GRB 110422A: SAO RAS optical observations
  61. GRB 110422A: NOT optical observation
  62. GRB 110422A: Swift-BAT refined analysis
  63. GRB 110422A: Swift detection of a burst
  64. GRB 110420B: Swift/UVOT Upper Limits
  65. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  66. GRB 110420B: Fermi GBM observation
  67. Konus-Wind observation of GRB 110420A
  68. GRB 110420B: Spectral lag indicates short hard burst
  69. GRB 110420B, GROND observations
  70. GRB 110420A Swift/UVOT Observations
  71. GRB 110420B: Swift-XRT afterglow candidate
  72. GRB 110420B: Swift-BAT refined analysis
  73. GRB 110420A: Swift-BAT refined analysis
  74. GRB 110420B: Swift detection of a short hard burst
  75. GRB 110420A: Swift-XRT refined Analysis
  76. GRB 110420A: Swift detection of a burst with optical counterpart
  77. GRB 110414A: GROND upper limits
  78. GRB 110414A: Swift-BAT Refined Analysis
  79. GRB 110414A: Swift/UVOT Upper limits
  80. GRB 110414A: Swift-XRT refined Analysis
  81. GRB 110414A : Faulkes Telescope North observations
  82. GRB 110414A: Swift detection of a burst
  83. GRB 110411A: PAIRITEL NIR Upper Limits
  84. GRB 110412A: Swift-BAT refined analysis
  85. GRB 110411A: optical limits from OSN
  86. GRB 110411A: Swift-XRT refined Analysis
  87. GRB 110412A: Fermi GBM observation
  88. GRB 110411A: Swift/UVOT Upper Limits
  89. GRB 110412A: Swift detection of a burst
  90. GRB 110411A, Swift-BAT refined analysis
  91. GRB 110411A: Swift detection of a burst
  92. GRB 110407A: Swift-XRT refined Analysis
  93. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  94. GRB 110328A / Swift J164449.3+573451: optical observations
  95. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  96. GRB 110407A: MASTER optical observations
  97. GRB110407A: UVOT Upper Limits
  98. GRB 110407A: GROND Detection of the Optical Afterglow
  99. GRB 110407A: Swift-BAT refined analysis
  100. IPN triangulation of the bright GRB110406A

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