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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"

41938 results found.

  1. GRB 160410A: further NOT optical observations
  2. GRB 160412A: Swift detection of a burst
  3. GRB 160408A: CALET Gamma-Ray Burst Monitor detection
  4. GRB 160409A: Swift ToO observations
  5. GRB 160410A: NOT observations of the afterglow
  6. GRB 160408A: 6.0 GHz VLA upper limit
  7. GRB 160411A: Gemini-S optical observations
  8. GRB 160411A: GROND Optical/NIR upper limits
  9. GRB 160411A: Swift/UVOT Upper Limits
  10. GRB 160410A: UKIRT near-IR upper limits
  11. GRB 160411A: Fermi GBM detection
  12. Konus-Wind observation of GRB 160410A (short/hard)
  13. GRB 160410A: TAROT La Silla observatory early optical observations
  14. GRB 160411A: Swift-XRT refined Analysis
  15. GRB 160410A: MITSuME Akeno optical upper limits
  16. GRB 160411A: MASTER-NET early optical observations.
  17. GRB 160410A: Swift-XRT refined Analysis
  18. GRB 160410A: GMG observation
  19. GRB 160411A: Swift detection of a short burst
  20. GRB 160410A: Keck-I/LRIS redshift
  21. GRB 160410A: Skynet PROMPT-CTIO observations of the optical afterglow
  22. GRB 160410A: Swift-BAT refined analysis of the short GRB
  23. GRB 160410A: Swift/UVOT Detection
  24. GRB 160410A: VLT/X-shooter redshift
  25. GRB 160410A: GROND optical detection
  26. GRB 160410A: Swift detection of a (possibly-short) burst with an optical counterpart
  27. GRB 160408A: GMG observation limit
  28. GRB 160408A: Gemini afterglow confirmation
  29. GRB 160408A: TLS Tautenburg observations
  30. GRB 160408A: Swift/UVOT Upper Limits
  31. GRB 160408A: Swift-XRT refined Analysis
  32. GRB 160408A: Fermi GBM detection
  33. GRB 160406A: Fermi GBM observation
  34. GRB 160408A: Swift-BAT refined analysis
  35. GRB 160408A: Gemini optical observations
  36. GRB 160408A: Swift detection of a short burst
  37. IPN Triangulation of GRB 160406A (short/hard)
  38. LIGO/Virgo G211117: 10.4m GTC follow-up of PS15dpn
  39. GRB 160401A: Swift-XRT observations
  40. GRB 160401A: Swift/UVOT Upper Limits
  41. GRB 160401A: Zadko observatory - Gingin optical observations
  42. GRB 160401A: LT observations
  43. GRB 160401A: Swift ToO observations
  44. GRB 160401A: MASTER-IAC prompt optical observations
  45. GRB 160401A: a long GRB detected by INTEGRAL
  46. GRB 160327A: Continued RATIR Optical and NIR Observations
  47. LIGO/Virgo G211117: LOFAR follow-up
  48. GRB 160324A: CALET Gamma-Ray Burst Monitor detection
  49. GRB 160327A: Early RAPTOR Limits
  50. GRB 160327A: JCMT SCUBA-2 sub-mm observation
  51. GRB 160327A: Imaging and spectroscopy from GTC
  52. Konus-Wind observation of GRB 160325A
  53. GRB 160327A: Continued RATIR Optical and NIR Observations
  54. GRB 160327A: KAIT optical afterglow confirmation
  55. GRB 160327A: Mondy optical upper limit
  56. GRB 160327A: Swift-BAT refined analysis
  57. GRB 160327A: Swift/UVOT Upper Limits
  58. GRB 160327A: Swift-XRT refined Analysis
  59. GRB 160327A: RATIR Optical and NIR Afterglow Detection
  60. GRB 160327A: Swift detection of a burst
  61. GRB 160325A, Swift-BAT refined analysis
  62. GRB 160325A: GROND Upper Limits
  63. GRB 160325A: Swift-XRT refined Analysis
  64. GRB 160325A: Further Swift/UVOT Observations
  65. GRB 160325A: afterglow confirmation
  66. GRB160325A Swift/UVOT Detection
  67. GRB 160325A: Fermi-LAT detection
  68. Swift Trigger 680457 is not a GRB
  69. LIGO/Virgo G211117: CALET GBM Observations
  70. GRB 160325A: Fermi GBM detection
  71. GRB160325A: REM NIR observations
  72. GRB 160325A: Swift detection of a burst
  73. Swift detects GX 301-2 in very high state
  74. Fermi Gamma-ray Burst Monitor trigger 160323546 is not a GRB
  75. GRB 160321A: AbAO optical observations
  76. GRB 160321A: Possible RATIR Optical and NIR Detections
  77. GRB 160321A: Swift/UVOT Upper Limits
  78. GRB 160321A: Swift-BAT refined analysis
  79. GRB 160321A: Swift-XRT refined Analysis
  80. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  81. GRB 160321A: MASTER observations zero Galaxy latitude GRB
  82. GRB 160321A: Swift detection of a probable burst
  83. GRB 160310A: Terskol 2-m observations
  84. IPN Triangulation of GRB 160310A
  85. SGR 0755-2933, Swift-BAT refined analysis
  86. GRB 160131A: 15 GHz upper limits from AMI-LA
  87. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  88. Swift detection of a likely new SGR: SGR 0755-2933
  89. GRB 160314A: Continued RATIR Optical and NIR Observations
  90. GRB 160313A: Mondy optical upper limit
  91. GRB 160314A: GROND optical/NIR observations
  92. GRB 160314A: ISON-Ussuriysk optical upper limit, updated photometry and correction of GCN 19184
  93. GRB 160314B: Fermi GBM observation
  94. GRB 160314B: Fermi-LAT detection
  95. GRB 160314A: RATIR Optical and NIR Observations
  96. GRB 160314A: Mondy optical observations
  97. GRB 160313A: Swift/UVOT Upper Limits
  98. GRB 160314A: VLT/X-shooter redshift
  99. GRB 160314A: NOT afterglow observations
  100. GRB 160314A: Swift-XRT refined Analysis

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