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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"

45919 results found.

  1. GRB 100823A: Swift-BAT refined analysis
  2. GRB 100823A: Enhanced Swift-XRT position
  3. GRB 100823A: Swift detection of a burst
  4. GRB 100814A: Suzaku WAM observation of the prompt emission
  5. GRB 100814A: ISON-NM optical observations
  6. IBAS Alert n. 6057 is not due to a GRB
  7. EVLA radio afterglow detection of GRB 100814A
  8. GRB 100814B: Fermi GBM detection
  9. GRB 100814A: optical observations
  10. GRB 100816A: Fermi GBM observation (correction to GCN 11124)
  11. Konus-Wind observation of GRB 100816A
  12. GRB100816A: MITSuME optical upper limits
  13. GRB 100816A: 10.4-m GTC redshift confirmation
  14. GRB 100816A: Fermi GBM observation
  15. GRB 100816A: VLT and Gemini-N revised redshift
  16. GRB 100814A : Liverpool Telescope Observations
  17. GRB 100814A: NOT optical observations
  18. GRB 100816A: NOT optical observations
  19. Konus-Wind observation of GRB 100814A
  20. GRB 100814A : Lulin optical observation
  21. GRB 100816A : Lulin r'-band observation
  22. GRB 100816A: Gemini-N spectroscopy
  23. GRB 100816A: Swift UVOT Observations
  24. GRB100816A Swift-XRT refined analysis
  25. GRB 100816A: Swift-BAT spectral lag results
  26. GRB 100816A: 1.23m CAHA optical observations
  27. GRB 100816A, Swift-BAT refined analysis
  28. GRB 100816A: Enhanced Swift-XRT position
  29. GRB 100816A: Gemini-N imaging
  30. GRB 100816A: CQUEAN riz-band Detection, Host Galaxy?
  31. GRB100814A - interesting UVOT lightcurve.
  32. GRB 100816A: TAROT Calern observatory optical detection
  33. GRB 100816A: MASTER Optical Limits
  34. GRB100816A: TNG optical afterglow confirmation.
  35. GRB 100816A: ROTSE-III Optical Limits
  36. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  37. Swift-BAT trigger 431756 is not a burst
  38. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  39. GRB 100814A: Fermi GBM observation
  40. GRB 100814A: Submm observations from APEX
  41. Swift/UVOT Observations of GRB100814A - a clearer table.
  42. GRB 100814A: Swift-XRT refined analysis
  43. Swift/UVOT observations of GRB100814A
  44. GRB 100814A, Swift-BAT refined analysis
  45. GRB 100814A: CQUEAN r- and i-band Observation
  46. GRB 100814A: Enhanced Swift-XRT position
  47. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  48. GRB 100814A: IAC80 R-band observations
  49. GRB100814A: Magellan Echellette Observations
  50. GRB 100814A: Swift UVOT observations of the optical afterglow
  51. GRB 100814A: Swift detection of a burst with an optical afterglow
  52. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  53. Swift-BAT trigger 431582 likely is IGR J17464-2811
  54. GRB 100805A: the 4-th epoch of SAO RAS optical observations
  55. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  56. GRB 100802A: further NOT observation
  57. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  58. GRB 100807A: P200 Infrared Observations
  59. GRB 100805A: the 3-rd epoch of SAO RAS optical observations
  60. GRB100807A: optical observation in CrAO
  61. GRB 100805A: optical observation in CrAO
  62. GRB 100805A: 2-nd epoch of SAO RAS optical observations
  63. GRB100807A: MITSuME optical upper limits
  64. GRB 100807A: Swift XRT refined analysis
  65. GRB 100807A: P60 Optical Afterglow Discovery
  66. GRB 100807A: Swift/UVOT Upper Limits
  67. GRB 100805A: SAO RAS optical observations
  68. GRB 100807A: Enhanced Swift-XRT position
  69. GRB 100807A: Swift-BAT refined analysis
  70. GRB 100807A: ROTSE-III Optical Limits
  71. GRB 100807A: Swift detection of a burst
  72. GRB 100805A: IAC80 and 1.5m OSN optical observations
  73. GRB 100805A: Xinglong TNT optical observation
  74. GRB 100805A: Early RAPTOR Observations
  75. GRB 100805A: ROTSE-III Optical detection
  76. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  77. GRB 100802A: WIYN observations
  78. GRB 100805A: IAC80 BVR-band observations
  79. Swift-BAT trigger 430975 is not a burst
  80. GRB 100805A: Swift-BAT refined analysis
  81. GRB 100805A: Swift-XRT Refined Analysis
  82. GRB 100805A: GRAS 002 optical observations
  83. Trigger 430975: Swift detection of a possible burst
  84. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  85. GRB 100805A: Enhanced Swift-XRT position
  86. GRB 100805A: Liverpool Telescope afterglow observations
  87. GRB 100805A: Further P60 Monitoring
  88. GRB 100805A: P60 Optical Afterglow Candidate
  89. GRB 100805A: Enhanced Swift-XRT position
  90. GRB 100805A: ROTSE-III Optical Limits
  91. GRB 100805A: Swift detection of a burst with an optical counterpart
  92. GRB 100802A: Fermi GBM observation
  93. GRB 100728B: optical photometry of ISON-NM
  94. GRB 100713A: second epoch Maidanak optical observation
  95. GRB 100713A: CrAO optical limits
  96. GRB 100802A: NOT optical observation
  97. GRB100802A: MITSuME optical upper limits
  98. GRB 100802A: P60 Observations
  99. GRB 100802A: XRT refined analysis
  100. GRB 100802A: Swift/UVOT Possible Optical Afterglow

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