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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"

36109 results found.

  1. GRB100826A: Fermi-LAT Observations
  2. GRB 100823A: optical upper limit
  3. GRB 100814A: Maidanak optical observations
  4. GRB 100823A: optical observations
  5. GRB 100823A: MAXI/GSC detection
  6. GRB 100725B: Mondy optical upper limit
  7. GRB 100725B: Maidanak optical upper limit
  8. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  9. GRB100807A: R band observations
  10. GRB100823A : MOA optical observation
  11. GRB 100823A: Candidate IR afterglow
  12. GRB 100823A: Swift XRT refined analysis
  13. GRB 100823A: VLT/X-Shooter spectroscopy
  14. GRB 100823A - second epoch WHT observations
  15. GRB 100823A: TNG NIR observations
  16. GRB 100823: 1.5m OSN I-band observations
  17. GRB 100823A: Swift/UVOT Upper Limits
  18. GRB 100823A: WHT observations
  19. GRB 100823A: Swift-BAT refined analysis
  20. GRB 100823A: Enhanced Swift-XRT position
  21. GRB 100823A: Swift detection of a burst
  22. GRB 100814A: Suzaku WAM observation of the prompt emission
  23. GRB 100814A: ISON-NM optical observations
  24. IBAS Alert n. 6057 is not due to a GRB
  25. EVLA radio afterglow detection of GRB 100814A
  26. GRB 100814B: Fermi GBM detection
  27. GRB 100814A: optical observations
  28. GRB 100816A: Fermi GBM observation (correction to GCN 11124)
  29. Konus-Wind observation of GRB 100816A
  30. GRB100816A: MITSuME optical upper limits
  31. GRB 100816A: 10.4-m GTC redshift confirmation
  32. GRB 100816A: Fermi GBM observation
  33. GRB 100816A: VLT and Gemini-N revised redshift
  34. GRB 100814A : Liverpool Telescope Observations
  35. GRB 100814A: NOT optical observations
  36. GRB 100816A: NOT optical observations
  37. Konus-Wind observation of GRB 100814A
  38. GRB 100814A : Lulin optical observation
  39. GRB 100816A : Lulin r'-band observation
  40. GRB 100816A: Gemini-N spectroscopy
  41. GRB 100816A: Swift UVOT Observations
  42. GRB100816A Swift-XRT refined analysis
  43. GRB 100816A: Swift-BAT spectral lag results
  44. GRB 100816A: 1.23m CAHA optical observations
  45. GRB 100816A, Swift-BAT refined analysis
  46. GRB 100816A: Enhanced Swift-XRT position
  47. GRB 100816A: Gemini-N imaging
  48. GRB 100816A: CQUEAN riz-band Detection, Host Galaxy?
  49. GRB100814A - interesting UVOT lightcurve.
  50. GRB 100816A: TAROT Calern observatory optical detection
  51. GRB 100816A: MASTER Optical Limits
  52. GRB100816A: TNG optical afterglow confirmation.
  53. GRB 100816A: ROTSE-III Optical Limits
  54. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  55. GRB 100814A: Fermi GBM observation
  56. GRB 100814A: Submm observations from APEX
  57. GRB 100814A: Swift-XRT refined analysis
  58. Swift/UVOT observations of GRB100814A
  59. GRB 100814A, Swift-BAT refined analysis
  60. GRB 100814A: CQUEAN r- and i-band Observation
  61. GRB 100814A: Enhanced Swift-XRT position
  62. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  63. GRB 100814A: IAC80 R-band observations
  64. GRB100814A: Magellan Echellette Observations
  65. GRB 100814A: Swift UVOT observations of the optical afterglow
  66. GRB 100814A: Swift detection of a burst with an optical afterglow
  67. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  68. GRB 100805A: the 4-th epoch of SAO RAS optical observations
  69. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  70. GRB 100802A: further NOT observation
  71. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  72. GRB 100807A: P200 Infrared Observations
  73. GRB 100805A: the 3-rd epoch of SAO RAS optical observations
  74. GRB100807A: optical observation in CrAO
  75. GRB 100805A: optical observation in CrAO
  76. GRB 100805A: 2-nd epoch of SAO RAS optical observations
  77. GRB100807A: MITSuME optical upper limits
  78. GRB 100807A: Swift XRT refined analysis
  79. GRB 100807A: P60 Optical Afterglow Discovery
  80. GRB 100807A: Swift/UVOT Upper Limits
  81. GRB 100805A: SAO RAS optical observations
  82. GRB 100807A: Enhanced Swift-XRT position
  83. GRB 100807A: Swift-BAT refined analysis
  84. GRB 100807A: ROTSE-III Optical Limits
  85. GRB 100807A: Swift detection of a burst
  86. GRB 100805A: IAC80 and 1.5m OSN optical observations
  87. GRB 100805A: Xinglong TNT optical observation
  88. GRB 100805A: Early RAPTOR Observations
  89. GRB 100805A: ROTSE-III Optical detection
  90. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  91. GRB 100802A: WIYN observations
  92. GRB 100805A: IAC80 BVR-band observations
  93. Swift-BAT trigger 430975 is not a burst
  94. GRB 100805A: Swift-BAT refined analysis
  95. GRB 100805A: Swift-XRT Refined Analysis
  96. GRB 100805A: GRAS 002 optical observations
  97. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  98. GRB 100805A: Enhanced Swift-XRT position
  99. GRB 100805A: Liverpool Telescope afterglow observations
  100. GRB 100805A: Further P60 Monitoring

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