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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"

19659 results found.

  1. GRB 110420A: Enhanced Swift-XRT position
  2. GRB 110420A: Swift detection of a burst with optical counterpart
  3. GRB 110414A: GROND upper limits
  4. GRB 110414A: Swift-BAT Refined Analysis
  5. GRB 110414A: Swift/UVOT Upper limits
  6. GRB 110414A: Swift-XRT refined Analysis
  7. GRB 110414A: Enhanced Swift-XRT position
  8. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  9. GRB 110414A : Faulkes Telescope North observations
  10. GRB 110414A: Swift detection of a burst
  11. GRB 110411A: PAIRITEL NIR Upper Limits
  12. GRB 110412A: Swift-BAT refined analysis
  13. GRB 110411A: Swift-XRT refined Analysis
  14. GRB 110412A: Fermi GBM observation
  15. GRB 110411A: Swift/UVOT Upper Limits
  16. GRB 110412A: Swift detection of a burst
  17. GRB 110411A, Swift-BAT refined analysis
  18. GRB 110411A: Enhanced Swift-XRT position
  19. GRB 110411A: MASTER optical observations
  20. GRB 110411A: Swift detection of a burst
  21. GRB 110328A / Swift J164449.3+573451: R-band Monitoring
  22. GRB 110407A: Swift-XRT refined Analysis
  23. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  24. GRB 110328A / Swift J164449.3+573451: optical observations
  25. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  26. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  27. GRB 110407A: MASTER optical observations
  28. GRB110407A: UVOT Upper Limits
  29. GRB 110407A: GROND Detection of the Optical Afterglow
  30. GRB 110407A: Enhanced Swift-XRT position
  31. GRB 110407A: Swift-BAT refined analysis
  32. IPN triangulation of the bright GRB110406A
  33. GRB 110407A: MASTER early optical observations
  34. GRB 110407A: Prompt enhanced Swift-XRT position
  35. GRB 110407A: Swift detection of a burst
  36. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  37. GRB 110402A: Suzaku WAM observation of the prompt emission
  38. GRB 110328/Swift J164449.3+573451: Chandra observations
  39. GRB 110328A / Swift J164449.3+573451: Keck LRIS R-band photometry
  40. GRB 110328A / Swift J164449.3+573451, HST Observations
  41. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  42. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  43. GRB 110402A: Fermi GBM detection
  44. GRB 110402A afterglow observation
  45. GRB 110328A / Swift J164449.3+573451: Keck/DEIMOS Optical Spectroscopy
  46. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  47. GRB 110402A: Swift/UVOT detection of afterglow candidate
  48. GRB 110402A: Spectral lag indicates short hard burst
  49. Konus-Wind observation of GRB 110402A
  50. GRB 110402A: Konkoly observations
  51. GRB 110328A: Konkoly observations.
  52. GRB 110402A: Swift-BAT refined analysis
  53. GRB 110402A: Swift-XRT refined Analysis
  54. GRB 110402A: early optical limit by "Pi of the Sky"
  55. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  56. GRB 110402A: PAIRITEL NIR Upper Limits
  57. GRB 110402A: Enhanced Swift-XRT position
  58. GRB 110402A: Liverpool Telescope Observations
  59. GRB 110402A: Swift detection of a burst
  60. GRB 110328A / Swift J164449.3+573451: KASINICS NIR Observation
  61. GRB 110328A / Swift J164449.3+57345: Correction to GCN 11850
  62. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  63. GRB 110328A / Swift J164449.3+573451: Infrared transient
  64. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  65. GRB 110328/Swift J164449.3+573451: Fermi observations
  66. GRB 110328A / Swift J164449.3+573451: KASINICS K-band Observation
  67. GRB 110328A / Swift J164449.3+573451
  68. GRB 110328A / Swift J164449.3+573451: EVLA observations of a brightening radio source
  69. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  70. GRB 110328A / Swift J164449.3+573451: Gemini and UKIRT IR observations
  71. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  72. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  73. GRB 110328A / Swift J164449.3+573451: beamed emission
  74. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  75. GRB 110328A / Swift J164449.3+573451: CARMA mm detection
  76. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  77. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  78. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  79. GRB 110328A / Swift J164449.3+573451: optical observations
  80. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  81. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  82. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  83. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  84. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  85. GRB 110328A: Enhanced Swift-XRT position
  86. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  87. GRB 110328A: Swift detection of a burst
  88. GRB110318B : MOA optical upper limit
  89. GRB 110319B Swift-XRT afterglow confirmation
  90. GRB 110319B BAT refined analysis
  91. GRB 110319B: Swift/UVOT Upper Limits
  92. GRB 110318B: Swift/UVOT Upper Limits
  93. GRB 110319B: GROND upper limits
  94. GRB 110319B: Swift-XRT afterglow candidate.
  95. GRB 110319B found in ground analysis of Swift-BAT data
  96. GRB 110319A: Swift/UVOT Detection
  97. GRB 110319A: Swift-BAT refined analysis
  98. GRB 110319A: Swift-XRT refined Analysis
  99. GRB 110318B: GROND upper limits
  100. GRB 110319A: Enhanced Swift-XRT position

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