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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"

43900 results found.

  1. IPN triangulation of GRB 110918A (long duration, extremely intense)
  2. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  3. GRB 110915A: Swift/UVOT Upper Limits
  4. GRB 110915A: GROND Upper limits
  5. GRB 110915A, Swift-BAT refined analysis
  6. GRB 110915A: Swift-XRT refined Analysis
  7. GRB 110915B: Afterglow candidate from OSN
  8. GRB 110915A: Deep Near-IR Limits from Magellan
  9. GRB 110915B: XRT afterglow candidate
  10. GRB 110903A: Suzaku WAM observation of the prompt emission
  11. GRB 110915A: Deep Gemini-South i/z-band imaging
  12. GRB110915A MITSuME Okayama J-band upper-limit
  13. GRB 110915A: NOT observations
  14. GRB 110915A: 1.23m CAHA I-band observations
  15. GRB 110915B: SuperAGILE localization of a long GRB
  16. GRB 110915A: Enhanced Swift-XRT position
  17. GRB 110915A: GMG optical upper limit
  18. GRB 110915A: MASTER-Net early limit
  19. GRB 110915A: Prompt enhanced Swift-XRT position
  20. GRB 110915A: Swift detection of a burst
  21. GRB 110825A: Further Swift/XRT Observations
  22. GRB 110731A: SAO RAS and Terskol observations
  23. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  24. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  25. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  26. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  27. GRB 110905A: KAIT observations
  28. GRB 110905A: Swift detection of a burst
  29. GRB 110903A: Fermi GBM observation
  30. GRB 110903A: Swift/UVOT Upper Limits
  31. GRB 110903A: Swift-XRT observations
  32. Konus-Wind observation of GRB 110903A
  33. GRB 110903A: a long GRB detected by INTEGRAL
  34. GRB 110820A: optical upper limit
  35. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  36. Trigger 502024: Swift detection of KS 1741-293
  37. GRB110825A: Fermi GBM observation
  38. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  39. Swift detection of an SGR burst from Swift J1834.9-0846
  40. GRB 110825A: Suzaku WAM observation of the prompt emission
  41. GRB 110825A: GMG optical observation
  42. GRB110825A: ROTSE early time optical limit
  43. GRB 110827A, Swift-BAT refined analysis
  44. GRB 110827A: Swift detection of a burst
  45. GRB 110825A: field inspection and possible host galaxy
  46. GRB110825A: Swift target of opportunity observation
  47. IPN triangulation of GRB110825A (very intense, long-duration)
  48. GRB 110820A, the review of the sky area in plate archives
  49. Swift-BAT Trigger 501485 is noise
  50. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  51. Fermi GBM trigger 110823.518 is not a GRB
  52. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  53. Konus-Wind observation of GRB 110820B
  54. GRB 110820A: MASTER-NET first hour observations
  55. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  56. GRB 110820A: Position udpate + 2nd epoch data
  57. GRB 110820A: i-band finding chart + correction to 12295
  58. GRB 110820A: CQUEAN izY Observation
  59. GRB 110820A: Swift-XRT refined Analysis
  60. GRB 110820A: Swift-BAT refined analysis
  61. GRB 110820A: Enhanced Swift-XRT position
  62. GRB 110820A: CrAO optical upper limit
  63. GRB 110820A: MASTER-NET observations
  64. GRB 110820A: Swift detection of a burst
  65. GRB 110818A: Fermi GBM observation
  66. GRB 110818A: Swift/UVOT Upper Limits
  67. GRB 110818A: Enhanced Swift-XRT position
  68. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  69. GRB 110818A: Swift-XRT refined Analysis
  70. GRB 110815A: Swift-XRT and UVOT refined Analysis
  71. GRB 110818A, Swift-BAT refined analysis
  72. GRB 110815A : Suzaku WAM observation of the prompt emission
  73. GRB 110818A: Swift detection of a burst
  74. Konus-Wind observation of GRB 110815A
  75. IPN triangulation of GRB110815A (long, intense)
  76. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  77. GRB 110801A: optical observations at Mt. Terskol observatory
  78. GRB 110812A: SuperAGILE localization of a long GRB.
  79. SGR 1834.9-0846/ GRB 110807A, I-band observations
  80. Konus-Wind observation of GRB 110808B
  81. Konus-Wind observation of GRB 110808A
  82. IPN triangulation of GRB 110808B (short/hard/intense)
  83. A new photometric resource for GRB observers
  84. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  85. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  86. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  87. GRB 110808A: Swift/UVOT Detection
  88. Swift Trigger 458942 is probably not a burst
  89. GRB 110808A: Swift-BAT refined analysis
  90. GRB 110808A: Swift-XRT refined Analysis
  91. SGR J1834.9-0846: A Neutron Star in W41?
  92. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  93. GRB 110808A: VLT/X-shooter spectroscopy
  94. GRB 110808A: Enhanced Swift-XRT position
  95. GRB 110808A: Swift detection of a burst with optical counterpart
  96. Fermi GBM detection of a SGR-like burst
  97. GRB 110807A: SAO RAS observations
  98. GRB 110807A: Swift detection of a burst or a posible new SGR
  99. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  100. GRB 110726A: two epochs of SAO RAS optical observations

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