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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"

42531 results found.

  1. GRB 130528A: Swift/UVOT Upper Limits
  2. Konus-Wind observation of GRB 130527A
  3. GRB 130529A: Prompt enhanced Swift-XRT position
  4. GRB 130528A: Swift-BAT refined analysis
  5. GRB 130529A: Swift detection of a burst
  6. GRB 130528A: Swift-XRT refined Analysis
  7. GRB 130527A: Swift/UVOT Upper Limits
  8. GRB 130528A: Enhanced Swift-XRT position
  9. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  10. GRB 130528A: optical upper limit
  11. GRB 130528A: Swift detection of a burst
  12. GRB 130527A: NOT optical counterpart
  13. GRB 130527A: RATIR Optical and NIR Observations
  14. GRB 130527A: Swift-BAT refined analysis
  15. GRB 130527A: Swift-XRT refined Analysis
  16. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  17. GRB 130527A: Enhanced Swift-XRT position
  18. GRB 130527A: Prompt enhanced Swift-XRT position
  19. GRB 130527A: Swift detection of a bright burst
  20. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  21. Swift Trigger 556533 is not an astrophysical event
  22. GRB 130521B: Suzaku WAM observation of the prompt emission
  23. Swift Trigger 556533 is probably not an astrophysical event
  24. Konus-Wind observation of GRB 130521B
  25. GRB 130521A: Skynet/PROMPT observations
  26. GRB 130514B: Further Swift-XRT Observations
  27. GRB 130521A, Swift-BAT refined analysis
  28. GRB 130521A: TAROT La Silla observatory optical observations
  29. GRB 130521A: Swift detection of a burst
  30. Swift XRT observation of GRB 130518B
  31. GRB 130518A: mm detection at PdBI
  32. GRB 130515A: Suzaku WAM observation of the prompt emission
  33. GRB 130518A: Gemini Redshift confirmation
  34. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  35. GRB 130518A: 10.4m GTC/OSIRIS redshift
  36. GRB 130518A: Continued RATIR Optical Observations - Fading
  37. Correction to GCN Circular 14682 (GRB 130518B)
  38. GRB 130518B found in ground analysis of Swift-BAT data
  39. GRB 130518A: Confirmation of the X-ray afterglow.
  40. GRB 130518A: P60 Afterglow Observations
  41. GRB 130518A: RATIR Optical and NIR Observations
  42. GRB 130518A: Swift XRT and UVOT possible afterglow
  43. Konus-Wind observation of GRB 130518A
  44. GRB 130518A Swift-BAT position from ground analysis
  45. GRB 130518A: Fermi LAT detection
  46. GRB 130518A: Fermi GBM detection
  47. VLT observations of GRB 130427A
  48. GRB 130427A: Konkoly optical observations
  49. GRB 130515A: IRSF NIR Observation
  50. GRB 130515A: Further Gemini Observations
  51. GRB 130427A:: BTA spectroscopic observations on May 10/11.
  52. Konus-Wind observation of GRB 130515A
  53. GRB 130515A: FORS2 spectroscopy of candidate counterpart
  54. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  55. GRB 130514B: RATIR Optical and NIR Observations
  56. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  57. GRB 130515A: Fermi GBM detection
  58. GRB 130427A: Skynet detections of a possible supernova
  59. GRB 130515A: Swift-XRT refined Analysis
  60. GRB 130515A: Swift/UVOT Upper Limits
  61. GRB 130514B Swift-BAT observations
  62. GRB 130515A: Swift-BAT refined analysis
  63. GRB 130514B: GROND observations
  64. GRB 130515A: Gemini/GMOS Observations
  65. GRB 130515A: GROND Observations
  66. GRB 130515A: Enhanced Swift-XRT position
  67. GRB 130515A: VLT acquisition observation
  68. GRB 130511A: SSO 2.3m observation
  69. GRB 130514B: Swift-XRT Observations
  70. GRB 130515A: Swift detection of a short burst
  71. GRB 130514A: Swift-XRT refined Analysis
  72. GRB 130514A: Skynet/PROMPT/DSO Detections
  73. GRB 130513A: Bassano Bresciano optical upper limit
  74. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC
  75. GRB 130427A: optical observations
  76. GRB130514B: MASTER-Net optical observations.
  77. GRB 130514A: RATIR Optical and NIR Observations
  78. GRB 130513A: RATIR Optical and NIR Observations
  79. GRB 130513A: Swift/UVOT Upper Limits
  80. GRB 130514A: Swift/UVOT Upper Limits
  81. GRB 130513A: GROND observations
  82. GRB 130514B: a long GRB detected by INTEGRAL
  83. GRB 130514A: Enhanced Swift-XRT position
  84. GRB 130514A: Swift-BAT refined analysis
  85. GRB 130513A: Swift-XRT detection of the afterglow.
  86. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  87. GRB 130514A: P60 Observations
  88. GRB 130514A: Swift detection of a burst
  89. GRB 130427A: Tautenburg 2nd epoch: No break, no clear SN
  90. GRB 130513A: a long GRB detected by INTEGRAL
  91. GRB130508A: MASTER-Net optical observations
  92. GRB130511A: SOAO Optical Observation
  93. GRB 130511A: Swift-XRT refined Analysis
  94. GRB 130511A: Kanata/HOWPol optical observation
  95. GRB 130511A: MITSuME Okayama upper limits
  96. GRB 130511A, Swift-BAT refined analysis
  97. GRB 130511A: Upper limit by Xinglong TNT optical observation
  98. GRB 130511A: Enhanced Swift-XRT position
  99. GRB 130511A: Gemini-North Redshift
  100. GRB 130511A: Swift detection of a burst with an optical counterpart

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