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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"

28234 results found.

  1. GRB 110422A: optical observations in CrAO, second epoch
  2. GRB 110422A: Suzaku WAM observation of the prompt emission
  3. GRB110422A: NOT optical follow-ups
  4. GRB 110422A: optical observations in CrAO
  5. GRB110422A: MITSuME Ishigakijima Optical Observation
  6. GRB 110422A: Further NOT observation
  7. GRB 110422A: Swift/UVOT Detection of optical afterglow
  8. GRB 110422A: Swift-XRT refined Analysis
  9. GRB 110422A: Enhanced Swift-XRT position
  10. GRB 110422A: TNG optical observations
  11. GRB 110422A: SAO RAS optical observations
  12. GRB 110422A: NOT optical observation
  13. GRB 110422A: Swift-BAT refined analysis
  14. GRB 110422A: Mondy optical observations
  15. GRB 110422A: Swift detection of a burst
  16. GRB 110420B: Swift/UVOT Upper Limits
  17. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  18. GRB 110420B: Swift-XRT afterglow candidate retraction
  19. GRB 110420B, GROND observations
  20. GRB 110420A Swift/UVOT Observations
  21. GRB 110420B: Swift-XRT afterglow candidate
  22. GRB 110420B: Swift-BAT refined analysis
  23. GRB 110420A: Swift-BAT refined analysis
  24. GRB 110420A: Swift-XRT refined Analysis
  25. GRB 110420A: Enhanced Swift-XRT position
  26. GRB 110420A: Swift detection of a burst with optical counterpart
  27. GRB110414A: MITSuME Ishigakijima Optical upper limits
  28. GRB 110414A: GROND upper limits
  29. GRB110414A: MITSuME Okayama Optical upper limits
  30. GRB 110414A: Swift-BAT Refined Analysis
  31. GRB 110414A: Swift/UVOT Upper limits
  32. GRB 110414A: Swift-XRT refined Analysis
  33. GRB 110414A: Enhanced Swift-XRT position
  34. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  35. GRB 110414A : Faulkes Telescope North observations
  36. GRB 110414A: Swift detection of a burst
  37. GRB 110411A: PAIRITEL NIR Upper Limits
  38. GRB 110412A: Swift-BAT refined analysis
  39. GRB 110411A: Swift-XRT refined Analysis
  40. GRB 110411A: Swift/UVOT Upper Limits
  41. GRB 110411A : Xinglong TNT OT candidate
  42. GRB 110411A, Swift-BAT refined analysis
  43. GRB 110411A: Enhanced Swift-XRT position
  44. GRB 110411A: Swift detection of a burst
  45. GRB 110407A: Swift-XRT refined Analysis
  46. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  47. GRB 110328A / Swift J164449.3+573451: optical observations
  48. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  49. GRB 110406A: Positional coincidence with NGC 404
  50. GRB110407A: UVOT Upper Limits
  51. GRB 110407A: GROND Detection of the Optical Afterglow
  52. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  53. GRB 110407A: NOT optical observations
  54. GRB 110407A: Enhanced Swift-XRT position
  55. GRB 110407A: Swift-BAT refined analysis
  56. GRB 100407A : Errata of afterglow position in GCN 11899
  57. IPN triangulation of the bright GRB110406A
  58. GRB 110407A : Lulin optical afterglow detection
  59. GRB 110407A: Swift detection of a burst
  60. Konus-Wind observation of GRB 110406A
  61. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  62. GRB 110402A: fading optical afterglow
  63. GRB 110402A: Suzaku WAM observation of the prompt emission
  64. GRB 110402A: LOAO Optical Observation
  65. GRB 110328A / Swift J164449.3+573451, HST Observations
  66. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  67. GRB 110401A: Fermi GBM detection
  68. GRB 110402A: Fermi GBM detection
  69. GRB 110402A: optical observations in Mondy
  70. GRB 110402A afterglow observation
  71. GRB 110328A / Swift J164449.3+573451: Keck/DEIMOS Optical Spectroscopy
  72. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  73. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  74. GRB 110402A: Swift/UVOT detection of afterglow candidate
  75. GRB 110402A: Konkoly observations
  76. GRB 110328A: Konkoly observations.
  77. GRB 110402A: Swift-BAT refined analysis
  78. GRB 110402A: Swift-XRT refined Analysis
  79. GRB 110402A: early optical limit by "Pi of the Sky"
  80. GRB 110402A: further NOT observations
  81. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  82. GRB 110402A: PAIRITEL NIR Upper Limits
  83. GRB 110402A: Enhanced Swift-XRT position
  84. GRB 110402A: NOT afterglow confirmation
  85. GRB 110402A: Swift detection of a burst
  86. GRB 110328A / Swift J164449.3+57345: Correction to GCN 11850
  87. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  88. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  89. GRB 110328A / Swift J164449.3+573451: KASINICS K-band Observation
  90. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  91. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  92. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  93. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  94. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  95. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  96. GRB 110328A / Swift J164449.3+573451: optical observations
  97. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  98. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  99. GRB 110213A, the review of the sky area in plate archives
  100. GRB 110328B: Fermi GBM detection

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