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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"

28222 results found.

  1. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  2. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  3. GRB110407A: UVOT Upper Limits
  4. GRB 110407A: GROND Detection of the Optical Afterglow
  5. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  6. GRB 110407A: NOT optical observations
  7. GRB 110407A: Enhanced Swift-XRT position
  8. GRB 100407A : Errata of afterglow position in GCN 11899
  9. GRB 110407A : Lulin optical afterglow detection
  10. GRB 110407A: Prompt enhanced Swift-XRT position
  11. GRB 110407A: Swift detection of a burst
  12. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  13. GRB 110402A: fading optical afterglow
  14. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  15. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  16. GRB 110401A: Fermi GBM detection
  17. GRB 110402A: Fermi GBM detection
  18. GRB 110402A afterglow observation
  19. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  20. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  21. GRB 110402A: Swift/UVOT detection of afterglow candidate
  22. GRB 110402A: Konkoly observations
  23. GRB 110402A: Swift-XRT refined Analysis
  24. GRB 110402A: PAIRITEL NIR Upper Limits
  25. GRB 110402A: Enhanced Swift-XRT position
  26. GRB 110402A: NOT afterglow confirmation
  27. GRB 110402A: Liverpool Telescope Observations
  28. GRB 110402A: Swift detection of a burst
  29. GRB 110328A / Swift J164449.3+57345: Correction to GCN 11850
  30. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  31. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  32. GRB 110328A / Swift J164449.3+573451: CARMA mm detection
  33. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  34. GRB 110328B: Fermi-LAT Detection
  35. GRB 110328B: Fermi GBM detection
  36. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  37. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  38. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  39. GRB 110328A: Enhanced Swift-XRT position
  40. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  41. GRB 110328A: Swift detection of a burst
  42. GRB110318B : MOA optical upper limit
  43. GRB 110319B Swift-XRT afterglow confirmation
  44. GRB 101225A: revised analysis of narrow band imaging
  45. GRB 110319B BAT refined analysis
  46. GRB 110319B: Swift/UVOT Upper Limits
  47. GRB 110318B: Swift/UVOT Upper Limits
  48. GRB 110319B: GROND upper limits
  49. GRB 110319B: Swift-XRT afterglow candidate.
  50. GRB 110319A: Swift/UVOT Detection
  51. GRB 110319A: Swift-XRT refined Analysis
  52. GRB 110318B: GROND upper limits
  53. GRB 110319A: Enhanced Swift-XRT position
  54. GRB 110319A: Swift detection of a burst
  55. GRB 110318B: Swift-XRT refined Analysis
  56. GRB 110318A: Fermi GBM detection
  57. GRB 110318B: Enhanced Swift-XRT position
  58. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  59. GRB 110318B: Swift detection of a burst
  60. GRB 110318A: Swift detection of a burst
  61. GRB 110315A: RTT150 optical observations
  62. GRB 110315A: Swift/UVOT Upper Limits
  63. GRB 110315A: Swift-XRT refined Analysis
  64. GRB 110315A: Swift-BAT refined analysis
  65. GRB 110315A: Enhanced Swift-XRT position
  66. GRB 110315A: Swift detection of a burst
  67. GRB110312A: MITSuME Okayama Optical upper limits
  68. GRB 110312A: RTT150 optical observations
  69. GRB 110312A: Swift/UVOT Upper Limits
  70. GRB 110312A: Swift-XRT refined Analysis
  71. GRB 110312A: GROND Upper Limits
  72. GRB 110312A: Enhanced Swift-XRT position
  73. GRB 110312A: Swift detection of a burst
  74. GRB 110305A: REM detection of a possible NIR afterglow
  75. GRB110305A: MITSuME Ishigakijima Optical upper limits
  76. GRB 110305A: Swift/UVOT Upper Limits
  77. GRB 110305A: Swift-XRT refined Analysis
  78. GRB 110305A: Enhanced Swift-XRT position
  79. GRB 110305A: GROND Detection of Optical Afterglow
  80. GRB 110305A: Swift detection of a burst
  81. GRB 110223A: optical upper limits
  82. GRB 110301A: Fermi GBM detection
  83. GRB101225A: early EVLA Observations of Christmas Burst
  84. Swift/UVOT observations of GRB110223A
  85. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  86. Swift/UVOT observations of GRB110223b
  87. GRB 110223A: Liverpool Telescope observations
  88. GRB 110223A: Swift-XRT refined Analysis
  89. GRB 110223B: Swift-XRT refined Analysis
  90. GRB 110223A: Enhanced Swift-XRT position
  91. GRB 110223B: Enhanced Swift-XRT position
  92. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  93. GRB 110223A: Observations from BOOTES-2
  94. GRB 110223B: Swift detection of a burst
  95. GRB 110223A: Swift detection of a burst
  96. GRB 110213B: Swift/UVOT observations
  97. GRB110213B: X-ray afterglow confirmation
  98. Fermi GBM detection of an SGR-like burst
  99. Swift XRT and UVOT Observations of OT 110215
  100. GRB 110213A: optical observations in CrAO

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