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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"

37375 results found.

  1. GRB 140610A: TShAO optical upper limit
  2. GRB 140619B: Fermi-LAT Detection
  3. GRB 140619B: Fermi GBM detection of a short GRB
  4. GRB 140619A: Swift/UVOT Observations
  5. GRB 140619A: Swift-XRT refined Analysis
  6. GRB 140619A: Enhanced Swift-XRT position
  7. GRB 140619A: Swift detection of a burst with a possible optical counterpart
  8. Swift-BAT trigger 601928: Detection of a possible outburst from V490 Cep
  9. GRB 140606B: Swift XRT final light curve
  10. GRB 140606A: BTA and OSN optical observations
  11. GRB 140614C: 1.23m CAHA (+EDIPO) observations
  12. GRB 140614B: MOSFIRE Ks-band nondetection
  13. GRB 140614C found in ground analysis of BAT data
  14. GRB 140614B: MITSuME Akeno upper limits
  15. GRB 140614B: Swift-XRT refined Analysis
  16. GRB 140614B: MITSuME Okayama upper limits
  17. GRB 140614B: Swift-BAT refined analysis
  18. GRB 140606B / iPTF 14bfu: Mondy optical observations
  19. GRB 140614A: Swift-BAT refined analysis
  20. GRB 140614A: X-shooter redshift
  21. GRB 140614B: Swift/UVOT Upper Limits
  22. GRB 140614B: RATIR Optical and NIR Observations
  23. GRB 140606B / iPTF 14bfu: AAO optical observations
  24. GRB 140614A: Swift/UVOT Upper Limits
  25. GRB 140614A: Swift-XRT refined Analysis
  26. GRB 140614B: Enhanced Swift-XRT position
  27. GRB 140614B: Swift detection of a burst
  28. GRB 140614A: Enhanced Swift-XRT position
  29. GRB 140614A: GROND afterglow candidate
  30. GRB 140614A: Swift detection of a burst
  31. GRB 140611A: Swift-XRT observations
  32. Konus-Wind observation of GRB 140611A
  33. GRB 140610A: Swift-XRT refined Analysis
  34. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  35. GRB 140611A Detection of a source in BAT ground analysis
  36. GRB 140610A: Fermi GBM Detection
  37. IPN Triangulation of GRB 140611A (short/hard)
  38. GRB 140610A: RATIR Optical and NIR Observations
  39. GRB 140610A: Swift-BAT refined analysis
  40. GRB 140610A: MASTER optical observations
  41. GRB 140610A: Swift/UVOT Upper Limits
  42. Konus-Wind observation of GRB 140610A
  43. Swift/XRT returns to normal observing
  44. GRB140606B: DCT time of observation correction
  45. GRB 140610A: Swift-XRT observations
  46. GRB 140610A: Swift detection of a burst
  47. Konus-Wind observation of GRB 140606B
  48. GRB 140606B: Swift XRT refined analysis
  49. GRB 140521A: AAO optical upper limit
  50. GRB 140606A: AAO optical upper limit
  51. GRB 140607A: Swift-BAT refined analysis
  52. IPN Triangulation of GRB 140606B
  53. GRB 140606B: Swift/UVOT Upper Limits
  54. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  55. GRB 140606B: Swift XRT position
  56. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  57. GRB 140607A: Swift detection of a burst
  58. GRB 140606B: Fermi GBM detection
  59. Fermi 423717114: Additional P48 and P60 observations
  60. GRB 140606A: BOOTES-2 optical upper limit
  61. GRB 140606A: Nanshan optical upper limit
  62. GRB 140606A: Swift/UVOT Upper Limits
  63. GRB 140606A: Swift-XRT upper limits
  64. Swift XRT status update
  65. GRB 140606A: Swift-BAT refined analysis
  66. GRB 140606A: Swift detection of a short hard burst
  67. Konus-Wind observation of GRB 140604A
  68. IPN Triangulation of GRB 140604A (short/hard)
  69. GRB 140523A: further Swift-XRT observations
  70. GRB 140528A: Fermi GBM Detection
  71. GRB 140529A BAT refined analysis
  72. Konus-Wind observation of GRB 140529A
  73. Konus-Wind observation of GRB 140528A
  74. GRB 140529A: Swift/UVOT Upper Limits
  75. GRB 140529A: Swift-XRT afterglow detection.
  76. GRB 140408A: Withdrawal of afterglow candidate
  77. GRB 140529A found in ground analysis of BAT slew data
  78. IPN Triangulation of GRB 140528A
  79. Chandra late-time observations of GRB140515A
  80. Fermi GBM trigger 422752719/ 140525971 is not a GRB
  81. GRB 140523A: NOT observation
  82. Konus-Wind observation of GRB 140523A
  83. IPN Triangulation of GRB 140523A
  84. GRB 140523A: Nanshan optical upper limit
  85. Swift trigger 599860 probably not real
  86. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  87. GRB 140523A Tiled Swift observations
  88. GRB 140523A: Fermi-LAT detection
  89. GRB 140523A: Fermi GBM detection
  90. GRB 140521A : Xinglong TNT upper limit
  91. GRB 140521A: Fermi GBM Detection
  92. GRB 140423A: TShAO optical observations
  93. GRB 140521A: AAO optical observations
  94. GRB 140521A: Swift-BAT refined analysis
  95. GRB 140521A: AROMA-N Optical Observation
  96. GRB 140521A: MITSuME Okayama upper limits
  97. GRB 140516A: further Swift-XRT analysis
  98. GRB 140521A: MASTER optical observations
  99. GRB 140521A: Swift detection of a burst
  100. GRB 140512A: Redshift from NOT

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