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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"

32549 results found.

  1. GRB 100814A: IAC80 R-band observations
  2. GRB100814A: Magellan Echellette Observations
  3. GRB 100814A: Swift UVOT observations of the optical afterglow
  4. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  5. Swift-BAT trigger 431582 likely is IGR J17464-2811
  6. GRB 100805A: the 4-th epoch of SAO RAS optical observations
  7. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  8. GRB 100802A: further NOT observation
  9. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  10. GRB 100807A: P200 Infrared Observations
  11. GRB 100805A: the 3-rd epoch of SAO RAS optical observations
  12. GRB100807A: optical observation in CrAO
  13. GRB 100805A: optical observation in CrAO
  14. GRB 100805A: 2-nd epoch of SAO RAS optical observations
  15. GRB100807A: MITSuME optical upper limits
  16. GRB 100807A: Swift XRT refined analysis
  17. GRB 100807A: P60 Optical Afterglow Discovery
  18. GRB 100807A: Swift/UVOT Upper Limits
  19. GRB 100805A: SAO RAS optical observations
  20. GRB 100807A: Swift-BAT refined analysis
  21. GRB 100807A: ROTSE-III Optical Limits
  22. GRB 100805A: Xinglong TNT optical observation
  23. GRB 100805A: Early RAPTOR Observations
  24. GRB 100805A: ROTSE-III Optical detection
  25. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  26. GRB 100802A: WIYN observations
  27. GRB 100805A: Swift-BAT refined analysis
  28. GRB 100805A: Swift-XRT Refined Analysis
  29. GRB 100805A: GRAS 002 optical observations
  30. GRB 100805A: Liverpool Telescope afterglow observations
  31. GRB 100805A: Further P60 Monitoring
  32. GRB 100805A: ROTSE-III Optical Limits
  33. GRB 100802A: Fermi GBM observation
  34. GRB 100728B: optical photometry of ISON-NM
  35. GRB 100713A: second epoch Maidanak optical observation
  36. GRB 100713A: CrAO optical limits
  37. GRB 100802A: NOT optical observation
  38. GRB100802A: MITSuME optical upper limits
  39. GRB 100802A: P60 Observations
  40. GRB 100802A: XRT refined analysis
  41. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  42. GRB 100728A: Suzaku WAM observation of the prompt emission
  43. GRB 100802A: Swift-BAT refined analysis
  44. GRB 100802A: Liverpool Telescope observations
  45. GRB 100802A: ROTSE-III Optical Limits
  46. GRB 100728B: Swift/UVOT Observations (correction to GCN 11028)
  47. GRB 100728B - NOT optical observation
  48. GRB 100728B: Swift/UVOT Observations
  49. GRB 100728B: Lick Observations
  50. GRB 100728B: Continued KAIT observations
  51. GRB 100728B, Swift-BAT refined analysis
  52. GRB 100728B: Swift-XRT Refined Analysis
  53. Konus-Wind observation of GRB 100728A
  54. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  55. GRB 100727A: Swift/UVOT Upper Limits
  56. GRB 100728A, Swift-BAT refined analysis
  57. GRB 100728A: Swift/UVOT Upper Limits
  58. GRB 100728B: Fermi GBM observation
  59. GRB 100728A: Swift-XRT refined analysis
  60. GRB 100728B: GROND Detection of the NIR Afterglow
  61. GRB 100728B: optical detection
  62. GRB 100728B: Skynet/PROMPT Detections (correction)
  63. GRB 100728B: KAIT optical afterglow detection (correction)
  64. GRB 100728A: Fermi GBM observation
  65. GRB 100727A: Swift XRT refined analysis
  66. GRB 100727A: Fermi GBM observation
  67. GRB 100727A, Swift-BAT refined analysis
  68. GRB100727A: MOA optical upper limit
  69. GRB 100724B: AGILE/GRID analysis
  70. GRB 100724B: Suzaku WAM observation of the prompt emission
  71. GRB 100724B: gamma-ray detection by AGILE
  72. GRB 100725B: Swift-BAT refined analysis
  73. GRB 100725B: refined XRT analysis
  74. GRB 100725A: GROND upper limits
  75. GRB 100725B: Swift/UVOT Upper Limits
  76. GRB 100725A: Swift/UVOT Upper Limits
  77. GRB 100725A: Swift-BAT refined analysis
  78. GRB 100725A: Swift XRT refined analysis
  79. GRB100725B: Faulkes Telescope North observations
  80. GRB100725A Faulkes Telescope South observations
  81. Konus-Wind observation of GRB 100724B
  82. GRB 100724B: Fermi LAT and GBM analysis
  83. GRB 100724A: Swift/BAT spectral lag results
  84. GRB 100724A: Swift XRT refined analysis
  85. GRB 100724A: Swift/UVOT observations
  86. GRB 100724A: Swift-BAT refined analysis
  87. GRB 100724A: X-shooter redshift
  88. GRB 100724A: fading afterglow seen with GROND
  89. GRB 100724A, GROND detection of an afterglow candidate
  90. GRB 100614A: 10.4-m GTC deep-optical limit
  91. GRB 100719A: Swift-BAT refined analysis
  92. GRB 100713A: optical observation in Maidanak
  93. GRB 100713A: further inspection of TNG images
  94. GRB 100713A: Swift XRT refined analysis
  95. GRB 100713A : IRSF/SIRIUS NIR upper limits
  96. GRB100713A: Swift/UVOT observations
  97. GRB 100713A: GROND upper limits
  98. GRB 100713A: optical upper limit
  99. GRB 100713A: TNG optical observations
  100. GRB 100707A: Suzaku WAM observation of the prompt emission

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