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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"

12340 results found.

  1. GRB100905A: MITSuME Okayama optical upper limits
  2. GRB100905A: 1.5m OSN upper limit
  3. GRB100904A: BOOTES-3 Upper Limit
  4. GRB 100905A: Swift detection of a burst
  5. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  6. GRB100902A: Optical upper limits at IAO
  7. GRB 100902A: 1.5m OSN I-band Upper Limits
  8. GRB 100902A: Swift/UVOT Upper Limits
  9. GRB 100902A: optical observation at Mt.Terskol
  10. Swift/UVOT Observations of GRB100901A
  11. GRB100901A: MITSuME Okayama Optical Observation
  12. GRB 100823A: optical upper limit
  13. GRB 100814A: Maidanak optical observations
  14. GRB 100823A: optical observations
  15. GRB 100725B: Mondy optical upper limit
  16. GRB 100725B: Maidanak optical upper limit
  17. GRB100807A: R band observations
  18. GRB 100823A: Swift/UVOT Upper Limits
  19. GRB 100823A: Swift detection of a burst
  20. GRB100816A: MITSuME optical upper limits
  21. GRB 100816A: Swift UVOT Observations
  22. Swift/UVOT observations of GRB100814A
  23. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  24. GRB100807A: optical observation in CrAO
  25. GRB 100805A: optical observation in CrAO
  26. GRB100807A: MITSuME optical upper limits
  27. GRB 100807A: Swift/UVOT Upper Limits
  28. GRB 100807A: Swift detection of a burst
  29. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  30. GRB 100805A: GRAS 002 optical observations
  31. Trigger 430975: Swift detection of a possible burst
  32. GRB 100713A: second epoch Maidanak optical observation
  33. GRB 100713A: CrAO optical limits
  34. GRB100802A: MITSuME optical upper limits
  35. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  36. GRB 100802A: Liverpool Telescope observations
  37. GRB 100802A: Swift detection of a burst
  38. GRB 100728B: Swift/UVOT Observations
  39. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  40. GRB 100727A: Swift/UVOT Upper Limits
  41. GRB 100728A: Swift/UVOT Upper Limits
  42. GRB 100728A: Swift detection of a burst
  43. GRB100727A: MOA optical upper limit
  44. GRB 100727A: Swift detection of a burst
  45. GRB100725B: MITSuME optical upper limits
  46. GRB 100725A: GROND upper limits
  47. GRB 100725B: Swift/UVOT Upper Limits
  48. GRB 100725A: Swift/UVOT Upper Limits
  49. GRB 100725B: Swift detection of a burst
  50. GRB 100724A: Swift/UVOT observations
  51. GRB 100713A: optical observation in Maidanak
  52. GRB 100713A : IRSF/SIRIUS NIR upper limits
  53. GRB100713A: Swift/UVOT observations
  54. GRB 100713A: GROND upper limits
  55. GRB 100713A: optical upper limit
  56. GRB100713A: Swift X-ray afterglow detection
  57. GRB 100628A: Swift XRT/UVOT refined analysis
  58. GRB 100704: Swift/UVOT Upper Limits
  59. GRB100704A: MOA optical upper limit
  60. GRB 100704A: Swift detection of a burst
  61. Swift/UVOT observations of GRB100702A
  62. GRB 100702A: Swift detection of a short burst
  63. XRF 100701A : MAXI/GSC detection of a probable XRF
  64. GRB100628A : MOA optical upper limit
  65. GRB 100628A: Swift/UVOT Upper Limits
  66. GRB 100628A: INTEGRAL SPI-ACS light curve
  67. GRB 100628A: Swift detection of a short hard burst
  68. GRB 100625A: Swift/UVOT Upper Limits
  69. GRB 100625A : IRSF/SIRIUS NIR upper limit
  70. GRB100625A : MOA optical upper limit
  71. GRB 100625A: Swift detection of a short hard burst
  72. GRB 100621A MOA-II optical limit
  73. GRB 100621A: Swift/UVOT observations
  74. GRB 100621A: Swift detection of a burst
  75. GRB 100619A: Swift/UVOT Upper Limits
  76. GRB 100619A: Swift detection of a burst
  77. XRF 100616a : MAXI/GSC detection of a probable XRF
  78. GRB 100615A: Swift/UVOT Upper Limits
  79. GRB 100614A: Swift/UVOT Upper Limits
  80. GRB 100614A: NOT optical upper limits
  81. GRB 100614A: MASTER-Net optical alert observations
  82. GRB 100615A: GROND observations, upper limits
  83. GRB 100615A: PAIRITEL NIR Upper Limits
  84. GRB 100615A: Swift detection of a burst
  85. GRB 100606A: GROND observations
  86. Trigger 424161: Swift/BAT trigger on XTE J1946+274/GRO J1944+26
  87. GRB 100606A: Swift/UVOT Upper Limits
  88. GRB 100606A: Swift detection of a burst
  89. GRB 100513A: CrAO optical observations
  90. GRB 100514A: CrAO optical observations
  91. GRB 100526A: optical upper limit
  92. Konus-Wind observation of GRB 100528A
  93. Swift UVOT and UVOT-enhanced XRT position for GRB 100528A
  94. GRB100526B: GROND Upper limits
  95. GRB 100526B: Swift/UVOT Upper Limits
  96. GRB 100526A: Swift/UVOT Upper Limits
  97. GRB 100526A: NOT optical upper limit
  98. GRB 100526A: MASTER-Net optical alert observations
  99. GRB 100526A: Swift detection of a burst
  100. GRB 100522A: GROND observations, upper limits

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