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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"

45720 results found.

  1. GRB 110328/Swift J164449.3+573451: Fermi observations
  2. GRB 110328A / Swift J164449.3+573451: KASINICS K-band Observation
  3. GRB 110328A / Swift J164449.3+573451
  4. GRB 110328A / Swift J164449.3+573451: EVLA observations of a brightening radio source
  5. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  6. GRB 110328A / Swift J164449.3+573451: Gemini and UKIRT IR observations
  7. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  8. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  9. GRB 110328A / Swift J164449.3+573451: beamed emission
  10. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  11. GRB 110328A / Swift J164449.3+573451: CARMA mm detection
  12. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  13. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  14. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  15. GRB 110328A / Swift J164449.3+573451: optical observations
  16. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  17. GRB 110328B: Fermi-LAT Detection
  18. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  19. GRB 110328A: Gemini spectroscopic observations
  20. GRB 110213A, the review of the sky area in plate archives
  21. GRB 110328B: Fermi GBM detection
  22. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  23. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  24. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  25. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  26. GRB 110328A: Enhanced Swift-XRT position
  27. GRB / X-ray transient 110328A: Gemini optical observations
  28. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  29. GRB 110328A: Swift detection of a burst
  30. GRB110318B : MOA optical upper limit
  31. Fermi Gamma-ray Burst Monitor trigger 322686470 (110324797) is not a GRB
  32. GRB 110319B Swift-XRT afterglow confirmation
  33. GRB 101225A: revised analysis of narrow band imaging
  34. GRB 110319B BAT refined analysis
  35. GRB 110319B: Swift/UVOT Upper Limits
  36. GRB 110318B: Swift/UVOT Upper Limits
  37. GRB 110319B: GROND upper limits
  38. GRB 110319B: Swift-XRT afterglow candidate.
  39. GRB 110319B found in ground analysis of Swift-BAT data
  40. GRB 110319A: Swift/UVOT Detection
  41. GRB 110319A: Swift-BAT refined analysis
  42. GRB 110319A: Swift-XRT refined Analysis
  43. GRB 110318B: GROND upper limits
  44. GRB 110319A: Enhanced Swift-XRT position
  45. GRB 110319A: Swift detection of a burst
  46. GRB 110318B: Swift-XRT refined Analysis
  47. GRB 110318A: Fermi GBM detection
  48. GRB 110318B: Swift-BAT refined analysis
  49. GRB 110318B: Enhanced Swift-XRT position
  50. GRB 110318A: Swift-BAT refined analysis
  51. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  52. GRB 110318B: Swift detection of a burst
  53. GRB 110318A: Swift detection of a burst
  54. Fermi GBM trigger 321944155 (110316205) is not a GRB
  55. GRB 110315A: RTT150 optical observations
  56. GRB 110315A: Swift/UVOT Upper Limits
  57. GRB 110315A: Swift-XRT refined Analysis
  58. GRB 110315A: Swift-BAT refined analysis
  59. GRB 110315A: Enhanced Swift-XRT position
  60. GRB 110315A: MASTER early optical observations
  61. GRB 110315A: Swift detection of a burst
  62. GRB110312A: MITSuME Okayama Optical upper limits
  63. GRB 110312A: RTT150 optical observations
  64. GRB 110312A: Swift/UVOT Upper Limits
  65. GRB 110312A: Swift-XRT refined Analysis
  66. GRB 110312A: GROND Upper Limits
  67. GRB 110312A: Enhanced Swift-XRT position
  68. GRB 110312A: Swift-BAT refined analysis
  69. GRB 110312A: Swift detection of a burst
  70. GRB 110305A: REM detection of a possible NIR afterglow
  71. GRB110305A: MITSuME Ishigakijima Optical upper limits
  72. GRB 110305A: Swift/UVOT Upper Limits
  73. GRB 110305A: Swift-XRT refined Analysis
  74. GRB 110305A: Enhanced Swift-XRT position
  75. GRB 110305A: Swift-BAT refined analysis
  76. IBAS trigger n. 6138 is not a GRB
  77. GRB 110305A: GROND Detection of Optical Afterglow
  78. GRB 110305A: Swift detection of a burst
  79. GRB 110223A: optical upper limits
  80. GRB 110301A: Fermi GBM detection
  81. GRB101225A: early EVLA Observations of Christmas Burst
  82. Swift/UVOT observations of GRB110223A
  83. No IPN GRB detected in conjunction with candidate GRB 110215
  84. GRB GRB 110223A: MASTER VWF early optical observations
  85. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  86. Swift/UVOT observations of GRB110223b
  87. GRB 110223A: Swift-BAT refined analysis
  88. GRB 110223A : early optical limit by "Pi of the Sky"
  89. GRB 110223A: Liverpool Telescope observations
  90. GRB 110223A: Swift-XRT refined Analysis
  91. GRB 110223B: Swift-XRT refined Analysis
  92. GRB 110223A: Enhanced Swift-XRT position
  93. GRB 110223B: Enhanced Swift-XRT position
  94. GRB 110223B: Swift-BAT refined analysis
  95. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  96. GRB 110223A: Observations from BOOTES-2
  97. GRB 110223B: Swift detection of a burst
  98. GRB 110223A: Swift detection of a burst
  99. GRB 101225A, the review of the sky area in plate archives
  100. OT 110215: Further NIR observations from NOT of the GRB candidate

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