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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"

24475 results found.

  1. GRB 120324A: Swift-XRT refined Analysis
  2. Konus-Wind observation of GRB 120324A
  3. GRB 120323A: Fermi GBM detection
  4. GRB 120324A: Swift-BAT refined analysis
  5. GRB 120324A: Liverpool Telescope optical candidate
  6. GRB 120324A: Swift detection of a burst
  7. GRB 120316A : Suzaku WAM observation of the prompt emission
  8. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  9. GRB 120320A: MITSuME Okayama Optical upper limits
  10. GRB 120320A, Swift-BAT refined analysis
  11. GRB 120320A: Gemini-N and UKIRT observations
  12. Konus-Wind observation of GRB 120316A
  13. IPN Triangulation of GRB 120316A
  14. GRB 120320A: MASTER optical observations
  15. GRB 120320A: Swift detection of a burst
  16. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  17. GRB 120312A: MASTER-NET optical observations
  18. GRB 120312A: Swift-BAT refined analysis
  19. GRB 120311A: VLT/X-shooter observations
  20. GRB 120311B: MITSuME Okayama Optical upper limits
  21. GRB 120311B: Faulkes Telescope North observations
  22. GRB 120311A: Swift-XRT refined Analysis
  23. GRB 120311B: Swift-BAT refined analysis
  24. GRB 120311A, Swift-BAT refined analysis
  25. GRB 120311B: Swift detection of a burst
  26. GRB 120311A: Liverpool Telescope optical candidate
  27. GRB 120311A: Swift detection of a burst
  28. GRB 120308A : LOAO optical observation
  29. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  30. GRB 120308A: Swift-XRT refined Analysis
  31. GRB 120308A: Swift-BAT refined analysis
  32. GRB 120308A: IAC80 I-band observations
  33. GRB 120308A: PAIRITEL NIR observations
  34. GRB 120308A: confirmation of the optical afterglow
  35. GRB 120308A: Liverpool Telescope optical afterglow candidate
  36. GRB 120308A: Swift detection of a burst
  37. GRB 120302A: Fermi GBM Observation
  38. GRB 120305A: Swift-BAT refined analysis
  39. GRB 120305A - Liverpool Telescope Observations
  40. GRB 120305A: MASTER-NET early optical observations
  41. GRB 120302A: GROND detection of an afterglow candidate
  42. GRB 120302A, Swift-BAT refined analysis
  43. GRB 120229A, Swift-BAT refined analysis
  44. GRB 120229A: Swift detection of a short burst
  45. Konus-Wind observation of GRB 120226A
  46. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  47. GRB 120226A: Fermi-LAT data analysis
  48. IPN Triangulation of GRB 120226A
  49. GRB 120224A: optical observation in Mondy observatory
  50. GRB 120226A: Fermi-LAT detection of a burst
  51. GRB 120224A: GROND detection of the afterglow candidate
  52. GRB 120224A: Swift-XRT refined Analysis
  53. GRB 120224A: Swift-BAT refined analysis
  54. GRB 120224A: FTN optical observations
  55. GRB 120224A: Swift detection of a burst
  56. GRB 120219A: MASTER prompt and early optical limit and OT discussion
  57. GRB120219A: Keck Observations
  58. GRB 120215A: MITSuME Akeno Optical upper limits
  59. GRB 120219A: MITSuME Okayama Optical upper limits
  60. GRB 120219A: Swift-BAT refined analysis
  61. GRB120219A: TNT optical afterglow candidates
  62. GRB 120219A: MASTER-NET prompt and early optical observations
  63. GRB 120219A: Swift detection of a burst
  64. GRB 120218A: Swift-BAT refined analysis
  65. GRB 120218A: Swift detection of a burst
  66. GRB 120215A: MITSuME Okayama Optical upper limits
  67. Fermi GBM detection of an SGR-like burst
  68. GRB 120215A: Swift-BAT refined analysis
  69. GRB 120211A : LOAO optical observations
  70. GRB 120213A: Swift-XRT refined Analysis
  71. GRB 120212A: Fermi GBM observation
  72. GRB 120212A: GMG optical observation
  73. GRB 120212A: MITSuME Ishigakijima Optical Observation
  74. GRB 120213A: Swift-BAT refined analysis
  75. GRB 120213A: MASTER-NET early optical observations
  76. GRB 120212A: NOT optical observation
  77. GRB 120212A: Swift-BAT refined analysis
  78. GRB 120211A: MITSuME Okayama Ks-band Observation
  79. GRB 120211A: GROND Upper limits
  80. GRB 120212A: Swift detection of a burst
  81. GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
  82. GRB 120211A, optical observations
  83. GRB 120211A: MASTER early optical observations
  84. GRB 120211A: Swift-BAT refined analysis
  85. GRB 120211A: MITSuME Okayama Ks-band upper limit
  86. GRB 120211A - Faulkes Telescope South Observations
  87. GRB 120202A: MASTER early optical observations
  88. LS I +61 303: Swift-BAT refined analysis
  89. GRB 120202A: GROND observations
  90. GRB 120202A: Swift/XRT and UVOT observations
  91. GRB 120202A: A long GRB detected by INTEGRAL
  92. GRB 111228A: Possible host detected by Swift/UVOT
  93. GRB 120129A: MASTER optical observations
  94. Konus-Wind observation of GRB 120129A
  95. IPN Triangulation of GRB 120129A (long/intense)
  96. GRB 120127A / P48 Imaging
  97. GRB 120127A: MASTER optical observations
  98. GRB 120119A : LOAO Optical Observations
  99. GRB 120119A: GRT detection of early afterglow
  100. GRB 120121A: Swift-BAT refined analysis

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