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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"

28248 results found.

  1. GRB 110709B: Swift-XRT refined Analysis
  2. GRB 110709A: Swift-XRT refined Analysis
  3. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  4. GRB110709A: MITSuME Ishigakijima Optical upper limits
  5. GRB 110709B: Enhanced Swift-XRT position
  6. GRB 110709B: Gemini-South additional analysis and photometry
  7. GRB 110709B: Preliminary Swift-BAT refined analysis
  8. GRB 110709B: GROND Detection of an Afterglow Candidate
  9. GRB 110709B: Gemini-South optical observations
  10. GRB 110709A: Swift-BAT refined analysis
  11. GRB 110709B: possible quiescent source in DSS
  12. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  13. GRB 110709A: Enhanced Swift-XRT position
  14. GRB 110709B: Swift detection of a burst
  15. GRB 110708A: Swift/UVOT Observations
  16. GRB 110709A: Swift detection of a burst
  17. GRB 110708A: Liverpool Telescope observations
  18. GRB 110708A: Lick observations
  19. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  20. GRB 110705A: Suzaku WAM observation of the prompt emission
  21. GRB 110625A, the review of the sky area in plate archives
  22. IPN triangulation of short hard GRB 110705A
  23. Swift trigger 456780 is not a burst
  24. GRB 110705A: Fermi GBM detection
  25. Swift Trigger 456659 is probably not astrophysical
  26. Swift-BAT trigger 456532 is not astrophysical
  27. SGR 1E 1841-045: early optical limit by "Pi of the Sky"
  28. SGR 1E 1841-045: Swift-BAT refined analysis
  29. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  30. GRB 110625A: Suzaku WAM observation of the prompt emission
  31. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  32. GRB 110625A: Fermi GBM and LAT observations
  33. GRB 110625A: Swift/UVOT Upper Limits
  34. GRB 110625A: 1.23m CAHA I-band observations
  35. GRB 110625A: Fermi LAT detection
  36. GRB 110625A: GROND detection of a source inside the XRT error circle
  37. GRB 110625A: Konkoly observations
  38. GRB 110625A: Swift-XRT refined Analysis
  39. GRB 110625A: Swift-BAT refined analysis
  40. Swift J185003.2-005627: NIR Observation
  41. GRB 110625A: Swift detection of a burst
  42. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  43. Swift J185003.2-005627: Swift-BAT refined analysis
  44. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  45. Swift J185003.2-005627: TAROT Calern observatory optical observations
  46. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  47. SGR 1E 1841-045: Swift-BAT refined analysis
  48. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  49. IPN triangulation of GRB110618A (long duration, extremely intense)
  50. GRB 110604A: Suzaku WAM observation of the prompt emission
  51. GRB 110610A: Suzaku WAM observation of the prompt emission
  52. GRB 110610A: Fermi GBM detection
  53. GRB 110610A: 1.23m CAHA optical observations
  54. GRB 110610A: Swift-XRT refined Analysis
  55. GRB 110610A: Swift/UVOT Upper Limits
  56. GRB 110610A: Enhanced Swift-XRT position
  57. GRB 110610A: Swift-BAT refined analysis
  58. Swift detection of the X-ray afterglow of GRB 110604A
  59. GRB 110610A: Swift detection of a burst
  60. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  61. GRB 110529A: Suzaku WAM observation of the prompt emission
  62. GMRT detection of GRB 110328A
  63. GRB 110530A: Swift-XRT refined Analysis
  64. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  65. GRB 110530A: Enhanced Swift-XRT position
  66. GRB 110530A: NOT optical observations
  67. GRB110530A: MITSuME Okayama Optical Observation
  68. GRB 110530A: Swift-BAT refined analysis
  69. GRB 110529A: Fermi GBM detection
  70. GRB 110530A: Swift detection of a burst with an optical afterglow
  71. LAT Observations of GRB110529A
  72. EVLA afterglow limits on the high z GRB090429B
  73. Swift J1644+57/GRB 110328A, Additional HST Observations
  74. GRB 110521A: MASTER prompt optical limit
  75. GRB 110521A: Swift/UVOT Upper Limits
  76. GRB 110521A: Swift-XRT refined analysis
  77. GRB 110520A: NOT optical follow-ups
  78. GRB 110521A - NOT optical observation
  79. GRB 110521A: Swift-BAT refined analysis
  80. GRB 110521A: Enhanced Swift-XRT position
  81. GRB 110521A: MASTER synchronous and early optical observations limit
  82. Swift/UVOT observations of GRB110520A
  83. GRB 110521A: Swift detection of a burst
  84. GRB 110520A: Swift-BAT refined analysis
  85. GRB 110520A: IAC80 I-band observations
  86. GRB 110520A: Swift-XRT refined Analysis
  87. GRB 110520A: Enhanced Swift-XRT position
  88. GRB 110520A: WHT IR observations
  89. GRB 110520A - NOT optical observation
  90. GRB 110520A: TAROT Calern observatory optical observations
  91. GRB 110520A: Swift detection of a burst
  92. IPN localization of bright GRB 110518A
  93. GRB 110519A, Swift-BAT refined analysis
  94. GRB 110519A: Swift detection of a burst
  95. GRB 110426A: Fermi GBM detection
  96. GRB 110428A: Fermi-GBM observation
  97. GRB 110503A: TAROT Calern observatory optical observations
  98. Konus-Wind observation of GRB 110503A
  99. GRB 110503A: optical observation in CrAO
  100. GRB 110503A: Centimeter observation from EVLA

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