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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"

28303 results found.

  1. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  2. SGR 1E 1841-045: Swift-BAT refined analysis
  3. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  4. IPN triangulation of GRB110618A (long duration, extremely intense)
  5. GRB 110604A: Suzaku WAM observation of the prompt emission
  6. GRB 110610A: Suzaku WAM observation of the prompt emission
  7. GRB 110610A: Fermi GBM detection
  8. GRB 110610A: 1.23m CAHA optical observations
  9. GRB 110610A: Swift-XRT refined Analysis
  10. GRB 110610A: Swift/UVOT Upper Limits
  11. GRB 110610A: Enhanced Swift-XRT position
  12. GRB 110610A: Swift-BAT refined analysis
  13. Swift detection of the X-ray afterglow of GRB 110604A
  14. GRB 110610A: Swift detection of a burst
  15. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  16. GRB 110529A: Suzaku WAM observation of the prompt emission
  17. GMRT detection of GRB 110328A
  18. GRB 110530A: Swift-XRT refined Analysis
  19. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  20. GRB 110530A: Enhanced Swift-XRT position
  21. GRB 110530A: NOT optical observations
  22. GRB110530A: MITSuME Okayama Optical Observation
  23. GRB 110530A: Swift-BAT refined analysis
  24. GRB 110529A: Fermi GBM detection
  25. GRB 110530A: Swift detection of a burst with an optical afterglow
  26. LAT Observations of GRB110529A
  27. EVLA afterglow limits on the high z GRB090429B
  28. Swift J1644+57/GRB 110328A, Additional HST Observations
  29. GRB 110521A: MASTER prompt optical limit
  30. GRB 110521A: Swift/UVOT Upper Limits
  31. GRB 110521A: Swift-XRT refined analysis
  32. GRB 110520A: NOT optical follow-ups
  33. GRB 110521A - NOT optical observation
  34. GRB 110521A: Swift-BAT refined analysis
  35. GRB 110521A: Enhanced Swift-XRT position
  36. GRB 110521A: MASTER synchronous and early optical observations limit
  37. Swift/UVOT observations of GRB110520A
  38. GRB 110521A: Swift detection of a burst
  39. GRB 110520A: Swift-BAT refined analysis
  40. GRB 110520A: IAC80 I-band observations
  41. GRB 110520A: Swift-XRT refined Analysis
  42. GRB 110520A: Enhanced Swift-XRT position
  43. GRB 110520A: WHT IR observations
  44. GRB 110520A - NOT optical observation
  45. GRB 110520A: TAROT Calern observatory optical observations
  46. GRB 110520A: Swift detection of a burst
  47. IPN localization of bright GRB 110518A
  48. GRB 110519A, Swift-BAT refined analysis
  49. GRB 110519A: Swift detection of a burst
  50. GRB 110426A: Fermi GBM detection
  51. GRB 110428A: Fermi-GBM observation
  52. GRB 110503A: TAROT Calern observatory optical observations
  53. Konus-Wind observation of GRB 110503A
  54. GRB 110503A: optical observation in CrAO
  55. GRB 110503A: Centimeter observation from EVLA
  56. GRB 110503A: Millimeter observation from SMA
  57. GRB 110503A: SARA-N Observations and Photometric Calibration
  58. GRB 110503A: Swift/UVOT Observations
  59. GRB 110503A: Swift-XRT refined Analysis
  60. GRB 110503A: PAIRITEL NIR Detection
  61. GRB 110503A: Swift-BAT refined analysis
  62. GRB 110503A: Enhanced Swift-XRT position
  63. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  64. GRB 110426A: Swift/XRT non-detection
  65. GRB 110428A : X-ray afterglow confirmation
  66. GRB 110428A: Suzaku WAM observation of the prompt emission
  67. GRB 110422A: optical observations in CrAO
  68. GRB 110428A : Swift-XRT observations
  69. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  70. GRB 110422A: optical observations in CrAO, second epoch
  71. GRB 110422A: Suzaku WAM observation of the prompt emission
  72. GRB110422A: NOT optical follow-ups
  73. GRB 110422A: optical observations in CrAO
  74. GRB110422A: MITSuME Ishigakijima Optical Observation
  75. GRB 110422A: Further NOT observation
  76. GRB 110422A: Swift/UVOT Detection of optical afterglow
  77. GRB 110422A: Swift-XRT refined Analysis
  78. GRB 110422A: Enhanced Swift-XRT position
  79. GRB 110422A: TNG optical observations
  80. GRB 110422A: SAO RAS optical observations
  81. GRB 110422A: NOT optical observation
  82. GRB 110422A: Swift-BAT refined analysis
  83. GRB 110422A: Mondy optical observations
  84. GRB 110422A: Swift detection of a burst
  85. GRB 110420B: Swift/UVOT Upper Limits
  86. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  87. GRB 110420B: Swift-XRT afterglow candidate retraction
  88. GRB 110420B, GROND observations
  89. GRB 110420A Swift/UVOT Observations
  90. GRB 110420B: Swift-XRT afterglow candidate
  91. GRB 110420B: Swift-BAT refined analysis
  92. GRB 110420A: Swift-BAT refined analysis
  93. GRB 110420A: Swift-XRT refined Analysis
  94. GRB 110420A: Enhanced Swift-XRT position
  95. GRB 110420A: Swift detection of a burst with optical counterpart
  96. GRB110414A: MITSuME Ishigakijima Optical upper limits
  97. GRB 110414A: GROND upper limits
  98. GRB110414A: MITSuME Okayama Optical upper limits
  99. GRB 110414A: Swift-BAT Refined Analysis
  100. GRB 110414A: Swift/UVOT Upper limits

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