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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"

32739 results found.

  1. GRB 110709B BAT refined analysis
  2. GRB 110709B: burst detection from Swift-BAT slew data
  3. GRB 110709B: Swift-XRT refined Analysis
  4. GRB 110709A: Swift-XRT refined Analysis
  5. GRB110709A: MITSuME Ishigakijima Optical upper limits
  6. Konus-Wind observation of GRB 110709A
  7. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  8. Konus-Wind observation of GRB 110709B
  9. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  10. GRB 110709A: Fermi GBM observation
  11. GRB 110709B: Gemini-South additional analysis and photometry
  12. GRB 110709B : A possible source in USNO B 1.0
  13. GRB 110709B: Preliminary Swift-BAT refined analysis
  14. GRB 110709B: GROND Detection of an Afterglow Candidate
  15. GRB 110709B: Gemini-South optical observations
  16. GRB 110709A: Swift-BAT refined analysis
  17. GRB 110709B: possible quiescent source in DSS
  18. GRB 110709A : Xinglong TNT upper limit
  19. GRB 110708A: Swift/UVOT Observations
  20. GRB 110709A: MASTER-NET optical observations
  21. GRB 110708A: Liverpool Telescope observations
  22. GRB 110708A: Lick observations
  23. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  24. GRB 110625A, the review of the sky area in plate archives
  25. Konus-Wind observation of GRB 110705A
  26. IPN triangulation of short hard GRB 110705A
  27. SGR 1E 1841-045: Swift-BAT refined analysis
  28. GRB 110625A: Suzaku WAM observation of the prompt emission
  29. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  30. GRB 110625A: Fermi GBM and LAT observations
  31. GRB 110625A: 1.23m CAHA I-band observations
  32. GRB 110625A: Fermi LAT detection
  33. GRB 110625A: GROND detection of a source inside the XRT error circle
  34. GRB 110625A: NIR Source
  35. GRB 110625A: Konkoly observations
  36. Konus-Wind observation of GRB 110625A
  37. GRB 110625A: Swift-XRT refined Analysis
  38. GRB 110625A: Swift-BAT refined analysis
  39. Swift J185003.2-005627: NIR Observation
  40. GRB 110625A: ROTSE-III Optical Limits
  41. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  42. Swift J185003.2-005627: Swift-BAT refined analysis
  43. SGR 1E 1841-045: Swift-BAT refined analysis
  44. GRB 110618A: SMARTS optical observations
  45. GRB 110604A: final update on Swift-XRT observations
  46. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  47. Konus-Wind observation of GRB 110618A
  48. IPN triangulation of GRB110618A (long duration, extremely intense)
  49. GRB 110604A: Suzaku WAM observation of the prompt emission
  50. GRB 110610A: Suzaku WAM observation of the prompt emission
  51. GRB 110610A: Fermi GBM detection
  52. GRB 110610A: 1.23m CAHA optical observations
  53. GRB 110610A: Swift-XRT refined Analysis
  54. GRB 110610A: Swift/UVOT Upper Limits
  55. GRB 110610A: Swift-BAT refined analysis
  56. Swift detection of the X-ray afterglow of GRB 110604A
  57. Konus-Wind observation of GRB 110604A
  58. GRB 110530A: optical observations in Mondy observatory
  59. GRB 110529A: Suzaku WAM observation of the prompt emission
  60. GRB 110530A: optical observations at Mt. Terskol, second epoch
  61. GRB 110530A: Swift-XRT refined Analysis
  62. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  63. GRB 110530A: Xinglong TNT observation
  64. GRB 110530A: NOT optical observations
  65. GRB 110530A: optical observations at Mt. Terskol
  66. GRB 110530A: Correction to GCN Circ 12050
  67. GRB 110530A: MASTER OT observations
  68. GRB 110530A: Swift-BAT refined analysis
  69. GRB 110529A: Fermi GBM detection
  70. Konus-Wind observation of GRB 110529A
  71. Swift J1644+57/GRB 110328A, Additional HST Observations
  72. GRB 110521A: MASTER prompt optical limit
  73. GRB 110521A: Swift/UVOT Upper Limits
  74. GRB 110521A: Swift-XRT refined analysis
  75. GRB 110520A: NOT optical follow-ups
  76. GRB 110521A - NOT optical observation
  77. GRB 110521A: Swift-BAT refined analysis
  78. GRB 110521A: MASTER synchronous and early optical observations limit
  79. Swift/UVOT observations of GRB110520A
  80. GRB 110520A: Swift-BAT refined analysis
  81. GRB 110520A: IAC80 I-band observations
  82. GRB 110520A: Swift-XRT refined Analysis
  83. GRB 110520A: WHT IR observations
  84. GRB 110520A - NOT optical observation
  85. GRB 110520A: Liverpool Telescope Observations
  86. Konus-Wind observation of GRB 110518A
  87. IPN localization of bright GRB 110518A
  88. Radio observations of GRB 110428A with the EVLA
  89. GRB 110519A, Swift-BAT refined analysis
  90. GRB 110503A optical observation
  91. GRB 110426A: Fermi GBM detection
  92. GRB 110428A: Fermi-GBM observation
  93. GRB 110503A: TAROT Calern observatory optical observations
  94. GRB 110503A: Jet Break seen from TLS
  95. GRB 110503A optical observations
  96. Konus-Wind observation of GRB 110503A
  97. GRB 110422A: MASTER first 30 min OT light curve
  98. GRB 110422A: Herschel FIR observation preliminary report
  99. GRB 110503A: optical observation in CrAO
  100. GRB 110503A: R-band Detection

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