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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"

26565 results found.

  1. GRB 110407A: Swift-XRT refined Analysis
  2. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  3. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  4. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  5. GRB110407A: UVOT Upper Limits
  6. GRB 110407A: GROND Detection of the Optical Afterglow
  7. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  8. GRB 110407A: NOT optical observations
  9. GRB 110407A: Enhanced Swift-XRT position
  10. IPN triangulation of the bright GRB110406A
  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 110402A: Suzaku WAM observation of the prompt emission
  15. GRB 110328/Swift J164449.3+573451: Chandra observations
  16. GRB 110402A: LOAO Optical Observation
  17. GRB 110328A / Swift J164449.3+573451, HST Observations
  18. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  19. GRB 110401A: Fermi GBM detection
  20. GRB 110402A: Fermi GBM detection
  21. GRB 110402A: optical observations in Mondy
  22. GRB 110402A afterglow observation
  23. GRB 110328A / Swift J164449.3+573451: Keck/DEIMOS Optical Spectroscopy
  24. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  25. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  26. GRB 110402A: Swift/UVOT detection of afterglow candidate
  27. GRB 110402A: Spectral lag indicates short hard burst
  28. GRB 110402A: Konkoly observations
  29. GRB 110328A: Konkoly observations.
  30. GRB 110402A: Swift-XRT refined Analysis
  31. GRB 110402A: early optical limit by "Pi of the Sky"
  32. GRB 110402A: further NOT observations
  33. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  34. GRB 110402A: PAIRITEL NIR Upper Limits
  35. GRB 110402A: Enhanced Swift-XRT position
  36. GRB 110402A: NOT afterglow confirmation
  37. GRB 110402A: Liverpool Telescope Observations
  38. GRB 110402A: Swift detection of a burst
  39. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  40. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  41. GRB 110328A / Swift J164449.3+573451: KASINICS K-band Observation
  42. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  43. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  44. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  45. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  46. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  47. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  48. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  49. GRB 110328A / Swift J164449.3+573451: optical observations
  50. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  51. GRB 110328B: Fermi GBM detection
  52. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  53. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  54. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  55. GRB 110328A: Enhanced Swift-XRT position
  56. GRB 110328A: Swift detection of a burst
  57. GRB 110319B Swift-XRT afterglow confirmation
  58. GRB 110319B BAT refined analysis
  59. GRB 110319B: Swift/UVOT Upper Limits
  60. GRB 110318B: Swift/UVOT Upper Limits
  61. GRB 110319B: GROND upper limits
  62. GRB 110319B: Swift-XRT afterglow candidate.
  63. GRB 110319B found in ground analysis of Swift-BAT data
  64. GRB 110319A: Swift/UVOT Detection
  65. GRB 110319A: Swift-XRT refined Analysis
  66. GRB 110318B: GROND upper limits
  67. GRB 110319A: Enhanced Swift-XRT position
  68. GRB 110319A: Swift detection of a burst
  69. GRB 110318B: Swift-XRT refined Analysis
  70. GRB 110318A: Fermi GBM detection
  71. GRB 110318B: Swift-BAT refined analysis
  72. GRB 110318B: Enhanced Swift-XRT position
  73. GRB 110318A: Swift-BAT refined analysis
  74. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  75. GRB 110318B: Swift detection of a burst
  76. GRB 110318A: Swift detection of a burst
  77. GRB 110315A: RTT150 optical observations
  78. GRB 110315A: Swift/UVOT Upper Limits
  79. GRB 110315A: Swift-XRT refined Analysis
  80. GRB 110315A: Swift-BAT refined analysis
  81. GRB 110315A: Enhanced Swift-XRT position
  82. GRB 110315A: Swift detection of a burst
  83. GRB110312A: MITSuME Okayama Optical upper limits
  84. GRB 110312A: RTT150 optical observations
  85. GRB 110312A: Swift/UVOT Upper Limits
  86. GRB 110312A: Swift-XRT refined Analysis
  87. GRB 110312A: GROND Upper Limits
  88. GRB 110312A: Enhanced Swift-XRT position
  89. GRB 110312A: Swift detection of a burst
  90. GRB 110305A: REM detection of a possible NIR afterglow
  91. GRB110305A: MITSuME Ishigakijima Optical upper limits
  92. GRB 110305A: Swift/UVOT Upper Limits
  93. GRB 110305A: Swift-XRT refined Analysis
  94. GRB 110305A: Enhanced Swift-XRT position
  95. GRB 110305A: GROND Detection of Optical Afterglow
  96. GRB 110305A: Swift detection of a burst
  97. GRB 110223A: optical upper limits
  98. GRB 110301A: Fermi GBM detection
  99. Swift/UVOT observations of GRB110223A
  100. No IPN GRB detected in conjunction with candidate GRB 110215

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