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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"

24437 results found.

  1. GRB 110414A: Swift-XRT refined Analysis
  2. GRB 110414A : Faulkes Telescope North observations
  3. GRB 110414A: Swift detection of a burst
  4. GRB 110411A: PAIRITEL NIR Upper Limits
  5. GRB 110412A: Swift-BAT refined analysis
  6. GRB 110411A: optical limits from OSN
  7. GRB 110412A: Fermi GBM observation
  8. GRB 110411A: MASTER prompt and follow-up optical limits
  9. GRB 110411A : Xinglong TNT OT candidate
  10. GRB 110412A: Swift detection of a burst
  11. GRB 110411A, Swift-BAT refined analysis
  12. GRB 110411A: MASTER optical observations
  13. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  14. GRB 110328A / Swift J164449.3+573451: optical observations
  15. GRB 110407A: SMARTS optical limit
  16. GRB 110407A: MASTER optical observations
  17. GRB 110407A: GROND Detection of the Optical Afterglow
  18. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  19. GRB 110407A: NOT optical observations
  20. GRB 110407A: Swift-BAT refined analysis
  21. GRB 110407A : Lulin optical afterglow detection
  22. GRB 110407A : Xinglong TNT upper limit
  23. GRB 110407A: MASTER early optical observations
  24. Konus-Wind observation of GRB 110406A
  25. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  26. GRB 110402A: Suzaku WAM observation of the prompt emission
  27. GRB 110402A: LOAO Optical Observation
  28. ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011
  29. Comparison of ICSP VLF observation of GRB 090424 with satellite observations
  30. GRB 110401A: Fermi GBM detection
  31. GRB 110402A: Fermi GBM detection
  32. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  33. Konus-Wind observation of GRB 110402A
  34. GRB 110402A: Konkoly observations
  35. GRB 110402A: Swift-BAT refined analysis
  36. GRB 110402A: Swift-XRT refined Analysis
  37. GRB 110402A: early optical limit by "Pi of the Sky"
  38. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  39. GRB 110402A: PAIRITEL NIR Upper Limits
  40. GRB 110402A: Liverpool Telescope Observations
  41. GRB 110328A / Swift J164449.3+57345: Correction to GCN 11850
  42. GRB 110328A / Swift J164449.3+573451: Infrared transient
  43. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  44. GRB 110328/Swift J164449.3+573451: Fermi observations
  45. GRB 110328A / Swift J164449.3+573451: KASINICS K-band Observation
  46. GRB 110328A / Swift J164449.3+573451
  47. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  48. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  49. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  50. GRB 110328A / Swift J164449.3+573451: beamed emission
  51. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  52. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  53. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  54. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  55. GRB 110328B: Fermi-LAT Detection
  56. GRB 110328B: Fermi GBM detection
  57. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  58. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  59. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  60. GRB / X-ray transient 110328A: Gemini optical observations
  61. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  62. GRB 101225A: revised analysis of narrow band imaging
  63. GRB 110319B BAT refined analysis
  64. GRB 110319B: GROND upper limits
  65. GRB 110319B: Swift-XRT afterglow candidate.
  66. GRB 110319B found in ground analysis of Swift-BAT data
  67. GRB 110319A: Swift-BAT refined analysis
  68. GRB 110318B: GROND upper limits
  69. GRB 110318A: Fermi GBM detection
  70. GRB 110318B: Swift-BAT refined analysis
  71. GRB 110318A: Swift-BAT refined analysis
  72. GRB 110318A: Swift detection of a burst
  73. GRB 110315A: Swift-BAT refined analysis
  74. GRB 110315A: MASTER early optical observations
  75. GRB110312A: MITSuME Okayama Optical upper limits
  76. GRB 110312A: GROND Upper Limits
  77. GRB 110312A: Swift-BAT refined analysis
  78. GRB 110305A: REM detection of a possible NIR afterglow
  79. GRB110305A: MITSuME Ishigakijima Optical upper limits
  80. GRB 110305A: Swift-BAT refined analysis
  81. IBAS trigger n. 6138 is not a GRB
  82. GRB 110305A: Swift detection of a burst
  83. GRB 110301A: Fermi GBM detection
  84. No IPN GRB detected in conjunction with candidate GRB 110215
  85. GRB GRB 110223A: MASTER VWF early optical observations
  86. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  87. GRB 110223A: Swift-BAT refined analysis
  88. GRB 110223A: Liverpool Telescope observations
  89. GRB 110223B: Swift-BAT refined analysis
  90. Fermi GBM detection of an SGR-like burst
  91. Swift XRT and UVOT Observations of OT 110215
  92. GRB 110213B: GROND observations of the optical/NIR afterglow
  93. GRB 110213A: YNAO-GMG Observations
  94. GRB 110213B: P60 Optical Afterglow Candidate
  95. GRB 110213A: TNT optical observations
  96. GRB 110212A: Swift XRT and UVOT observations
  97. GRB 110213A: Fermi GBM observation
  98. GRB 110205A: Konkoly optical observations
  99. GRB 110213A: MITSuME Akeno Optical Observation
  100. Konus-Wind observation of GRB 110213A

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