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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"

23707 results found.

  1. GRB 110422A: TNG optical observations
  2. GRB 110422A: MASTER earlier OT polarization observations
  3. GRB 110422A: Swift-BAT refined analysis
  4. GRB 110422A: Swift detection of a burst
  5. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  6. Konus-Wind observation of GRB 110420A
  7. GRB 110420B, GROND observations
  8. GRB 110420B: Swift-BAT refined analysis
  9. GRB 110420A: Swift-BAT refined analysis
  10. GRB 110420B: Swift detection of a short hard burst
  11. GRB 110420A: Swift detection of a burst with optical counterpart
  12. GRB110414A: MITSuME Ishigakijima Optical upper limits
  13. GRB 110414A: GROND upper limits
  14. GRB110414A: MITSuME Okayama Optical upper limits
  15. GRB 110414A: Swift-BAT Refined Analysis
  16. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  17. GRB 110414A : Faulkes Telescope North observations
  18. GRB 110414A: Swift detection of a burst
  19. GRB 110412A: Swift-BAT refined analysis
  20. GRB 110411A: optical limits from OSN
  21. GRB 110411A: MASTER prompt and follow-up optical limits
  22. GRB 110412A: Swift detection of a burst
  23. GRB 110411A, Swift-BAT refined analysis
  24. GRB 110411A: MASTER optical observations
  25. GRB 110411A: Swift detection of a burst
  26. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  27. GRB 110328A / Swift J164449.3+573451: optical observations
  28. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  29. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  30. GRB 110407A: MASTER optical observations
  31. GRB 110407A: GROND Detection of the Optical Afterglow
  32. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  33. GRB 110407A: Enhanced Swift-XRT position
  34. GRB 110407A: Swift-BAT refined analysis
  35. IPN triangulation of the bright GRB110406A
  36. GRB 110407A : Lulin optical afterglow detection
  37. GRB 110407A: MASTER early optical observations
  38. GRB 110407A: Swift detection of a burst
  39. Konus-Wind observation of GRB 110406A
  40. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  41. GRB 110406A: An exceptionally bright burst detected by INTEGRAL SPI-ACS
  42. Redshift of GRB 110402A theoretically estimated
  43. GRB 110402A: Suzaku WAM observation of the prompt emission
  44. GRB 110328A / Swift J164449.3+573451: Keck LRIS R-band photometry
  45. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  46. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  47. GRB 110401A: Fermi GBM detection
  48. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  49. Konus-Wind observation of GRB 110402A
  50. GRB 110402A: Swift-BAT refined analysis
  51. GRB 110402A: early optical limit by "Pi of the Sky"
  52. GRB 110402A: further NOT observations
  53. GRB 110402A: NOT afterglow confirmation
  54. GRB 110402A: Liverpool Telescope Observations
  55. GRB 110402A: Swift detection of a burst
  56. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  57. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  58. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  59. GRB 110328A / Swift J164449.3+573451: optical observations
  60. GRB 110213A, the review of the sky area in plate archives
  61. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  62. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  63. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  64. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  65. GRB 110328A: Swift detection of a burst
  66. GRB 110319B BAT refined analysis
  67. GRB 110319B: GROND upper limits
  68. GRB 110319B found in ground analysis of Swift-BAT data
  69. GRB 110319A: Swift/UVOT Detection
  70. GRB 110319A: Swift-BAT refined analysis
  71. GRB 110318B: GROND upper limits
  72. GRB 110319A: Swift detection of a burst
  73. GRB 110318A: Fermi GBM detection
  74. GRB 110318B: Swift-BAT refined analysis
  75. GRB 110318A: Swift-BAT refined analysis
  76. GRB 110318B: Swift detection of a burst
  77. GRB 110318A: Swift detection of a burst
  78. GRB 110315A: RTT150 optical observations
  79. GRB 110315A: Swift-BAT refined analysis
  80. GRB 110315A: MASTER early optical observations
  81. GRB 110315A: Swift detection of a burst
  82. GRB110312A: MITSuME Okayama Optical upper limits
  83. GRB 110312A: RTT150 optical observations
  84. GRB 110312A: GROND Upper Limits
  85. GRB 110312A: Swift-BAT refined analysis
  86. GRB 110312A: Swift detection of a burst
  87. GRB110305A: MITSuME Ishigakijima Optical upper limits
  88. GRB 110305A: Swift-BAT refined analysis
  89. GRB 110305A: Swift detection of a burst
  90. GRB 110301A: Fermi GBM detection
  91. Swift/UVOT observations of GRB110223A
  92. No IPN GRB detected in conjunction with candidate GRB 110215
  93. GRB GRB 110223A: MASTER VWF early optical observations
  94. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  95. Swift/UVOT observations of GRB110223b
  96. GRB 110223A: Swift-BAT refined analysis
  97. GRB 110223A : early optical limit by "Pi of the Sky"
  98. GRB 110223A: Liverpool Telescope observations
  99. GRB 110223A: Swift-XRT refined Analysis
  100. GRB 110223B: Swift-XRT refined Analysis

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