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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"

45998 results found.

  1. Konus-Wind observation of GRB 111205A
  2. IPN Triangulation of GRB 111205A (long/hard/intense)
  3. GRB 111117A: Refined GMG observation
  4. GRB 111204A: TNG NIR observations
  5. GRB 111201A: GMG optical observation
  6. GRB 111204A: GROND Observations
  7. GRB 111204A: Swift-XRT refined Analysis
  8. GRB 111204A, Swift-BAT refined analysis
  9. GRB 111022B: CrAO optical limit
  10. GRB 111204A: Swift/UVOT Upper Limits
  11. GRB 110921A: optical observations in Maidanak observatory
  12. GRB 111204A: MASTER optical observations
  13. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  14. GRB 111204A: Enhanced Swift-XRT position
  15. GRB 111123A: optical upper limit in CrAO
  16. GRB 111204A: Swift detection of a burst
  17. GRB 111201A: Confirmation of the X-ray afterglow
  18. GRB 111201A: Swift/UVOT Upper Limits
  19. GRB111201A: Swift-XRT observations
  20. GRB 111201A found in ground analysis of BAT data
  21. GRB 111121A: Suzaku WAM observation of the prompt emission
  22. GRB 111129A: Swift/UVOT Detection
  23. GRB 111129A, GROND afterglow observations
  24. GRB 111129A: Swift-XRT refined Analysis
  25. GRB 111126A Circular #12599 erratum
  26. GRB 111129A: Swift-BAT refined analysis
  27. GRB 111129A: Enhanced Swift-XRT position
  28. GRB 111129A: Swift detection of a burst with an optical counterpart
  29. GRB 111126A found in ground analysis of BAT data
  30. GRB 111123A, Swift-BAT refined analysis
  31. GRB 111123A: Swift/UVOT Upper Limits
  32. GRB 111123A - NOT optical observations
  33. GRB 111123A, GROND observations
  34. GRB 111123A: correction to GCN 12593
  35. GRB 111123A: TNG NIR detection of the afterglow candidate
  36. GRB 111123A: Swift-XRT refined Analysis
  37. GRB 111123A: MITSuME Okayama Optical upper limits
  38. GRB 111123A: Enhanced Swift-XRT position
  39. GRB 111123A: GMG optical observation
  40. GRB 111117A: Refined Chandra Astrometry
  41. GRB 111123A: Swift detection of a burst
  42. GRB 111117A, the review of the sky area in plate archives
  43. Konus-Wind observation of GRB 111121A
  44. GRB 111121A: Swift/UVOT Upper Limits
  45. GRB 111121A: Magellan/Megacam observations
  46. GRB 111121A: Swift-XRT refined Analysis
  47. GRB 111121A: Swift-BAT refined analysis
  48. GRB 111117A: Chandra detection of the afterglow
  49. GRB 111121A: Enhanced Swift-XRT position
  50. GRB 111121A: Swift detection of a short hard burst
  51. GRB 111117A: Gemini Afterglow Limits
  52. GRB 111117A: optical upper limit in CrAO
  53. GRB 111117A: Fermi GBM observation
  54. GRB 111117A: further NOT observations
  55. GRB 111117A: EVLA observations
  56. GRB 111117A: TNG observations
  57. GRB 111117A: Swift/UVOT Upper Limits
  58. GRB 111117A: GROND observations
  59. GRB 111117A: Gemini host observation
  60. GRB111117A: Magellan IMACS observations
  61. GRB 111117A: Swift-XRT refined Analysis
  62. GRB111107A: Further ATCA observations - no detection
  63. GRB 111117A: NOT observations
  64. GRB 111117A: Chandra ToO observation scheduled
  65. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  66. GRB 111117A: GMG upper limit
  67. GRB 111117A: Swift detection of a short hard burst
  68. GRB111107A: ATCA observations - upper limit and a possible detection
  69. Konus-Wind observation of GRB 111113A
  70. IPN Triangulation of GRB 111113A (short/hard/intense)
  71. XRF 111111A/MAXI J0158-744: MAXI GSC refined analysis
  72. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  73. GRB 111109A: Swift-XRT refined Analysis
  74. GRB 111109A: Swift/UVOT Photometry
  75. GRB 111109A: Swift-BAT refined analysis
  76. GRB 111109A: Enhanced Swift-XRT position
  77. GRB 111109A: Swift-XRT observations
  78. GRB 111109A: Swift detection of a burst
  79. GRB 111103B: optical upper limit of CrAO
  80. GRB 111103B: optical upper limit of Mt. Terskol observatory
  81. GRB 111107A: Fermi GBM observation
  82. Continued Skynet observations of GRB111107A
  83. GRB 111107A: Swift-XRT refined Analysis
  84. GRB 111107A: VLT/X-shooter spectroscopy
  85. GRB 111107A: APEX submm observation
  86. GRB 111107A: Swift/UVOT Afterglow Analysis
  87. GRB 111107A: Swift-BAT refined analysis
  88. GRB 111107A: Enhanced Swift-XRT position
  89. GRB 111107A: Gemini-South Redshift
  90. GRB 111107A: GROND observations
  91. Skynet observations of GRB 111107A
  92. GRB 111107A: Swift detection of a burst with an optical counterpart
  93. GRB 111103B: MITSuME Akeno Optical upper limits
  94. Konus-Wind observation of GRB 111103B
  95. GRB 111103B : WIYN 3.5m NIR observations
  96. GRB 111103B: Swift-XRT refined Analysis
  97. GRB 111103A: Fermi GBM observation
  98. GRB111103B Swift/UVOT Upper Limits
  99. GRB 111103B: optical observations from TAU, Ka-Dar
  100. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart

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