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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"

37729 results found.

  1. GRB 110610A: Fermi GBM detection
  2. GRB 110610A: 1.23m CAHA optical observations
  3. GRB 110610A: Swift-XRT refined Analysis
  4. GRB 110610A: Swift/UVOT Upper Limits
  5. GRB 110610A: Enhanced Swift-XRT position
  6. GRB 110610A: Swift-BAT refined analysis
  7. Swift detection of the X-ray afterglow of GRB 110604A
  8. GRB 110610A: MASTER-NET optical observations
  9. GRB 110610A: Swift detection of a burst
  10. Konus-Wind observation of GRB 110604A
  11. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  12. GRB 110530A: optical observations in Mondy observatory
  13. GRB 110529A: Suzaku WAM observation of the prompt emission
  14. GMRT detection of GRB 110328A
  15. GRB 110530A: optical observations at Mt. Terskol, second epoch
  16. GRB 110530A: Swift-XRT refined Analysis
  17. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  18. GRB 110530A: Xinglong TNT observation
  19. GRB 110530A: Enhanced Swift-XRT position
  20. GRB 110530A: NOT optical observations
  21. GRB110530A: MITSuME Okayama Optical Observation
  22. GRB 110530A: optical observations at Mt. Terskol
  23. GRB 110530A: Correction to GCN Circ 12050
  24. GRB 110530A: MASTER OT observations
  25. GRB 110530A: Swift-BAT refined analysis
  26. GRB 110530A: MITSuME Akeno Optical Observation
  27. GRB 110529A: Fermi GBM detection
  28. GRB 110530A: Swift detection of a burst with an optical afterglow
  29. Konus-Wind observation of GRB 110529A
  30. LAT Observations of GRB110529A
  31. EVLA afterglow limits on the high z GRB090429B
  32. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  33. Swift J1644+57/GRB 110328A, Additional HST Observations
  34. GRB 110521A: MASTER prompt optical limit
  35. GRB 110521A: Swift/UVOT Upper Limits
  36. GRB 110521A: Swift-XRT refined analysis
  37. GRB 110520A: NOT optical follow-ups
  38. GRB 110521A - NOT optical observation
  39. GRB 110521A: Swift-BAT refined analysis
  40. GRB 110521A: Enhanced Swift-XRT position
  41. GRB 110521A: MASTER synchronous and early optical observations limit
  42. Swift/UVOT observations of GRB110520A
  43. GRB 110521A: Swift detection of a burst
  44. GRB 110520A: Swift-BAT refined analysis
  45. GRB 110520A: IAC80 I-band observations
  46. GRB 110520A: Swift-XRT refined Analysis
  47. GRB 110520A: Enhanced Swift-XRT position
  48. GRB 110520A: WHT IR observations
  49. GRB 110520A - NOT optical observation
  50. GRB 110520A: Skynet/DAO optical observations
  51. GRB 110520A: Liverpool Telescope Observations
  52. GRB 110520A: TAROT Calern observatory optical observations
  53. GRB 110520A: MASTER-NET optical observations
  54. GRB 110520A: Swift detection of a burst
  55. Konus-Wind observation of GRB 110518A
  56. IPN localization of bright GRB 110518A
  57. Radio observations of GRB 110428A with the EVLA
  58. GRB 110519A, Swift-BAT refined analysis
  59. GRB 110519A: Swift detection of a burst
  60. GRB 110503A optical observation
  61. GRB 110426A: Fermi GBM detection
  62. GRB 110428A: Fermi-GBM observation
  63. GRB 110503A: TAROT Calern observatory optical observations
  64. GRB 110503A: Jet Break seen from TLS
  65. GRB 110503A optical observations
  66. Konus-Wind observation of GRB 110503A
  67. GRB 110422A: MASTER first 30 min OT light curve
  68. GRB 110422A: Herschel FIR observation preliminary report
  69. GRB 110503A: optical observation in CrAO
  70. GRB 110503A: R-band Detection
  71. GRB 110503A: Centimeter observation from EVLA
  72. GRB 110503A: Millimeter observation from SMA
  73. GRB 110503A: SARA-N Observations and Photometric Calibration
  74. GRB 110503A: Swift/UVOT Observations
  75. GRB 110503A: Swift-XRT refined Analysis
  76. GRB 110503A: PAIRITEL NIR Detection
  77. GRB 110503A: redshift confirmation from TNG
  78. GRB 110503A - TLS Afterglow Observations
  79. GRB 110503A: Swift-BAT refined analysis
  80. GRB 110503A: NOT afterglow photometry
  81. GRB 110503A: Redshift from 10.4m GTC
  82. GRB 110503A: Enhanced Swift-XRT position
  83. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  84. GRB 110426A: Swift/XRT non-detection
  85. GRB 110428A : X-ray afterglow confirmation
  86. GRB 110428A: Suzaku WAM observation of the prompt emission
  87. Fermi-GBM data processing and delivery
  88. GRB 110422A: optical observations in CrAO
  89. GRB 110422A: Update of Herschel FIR observation schedule
  90. GRB 110428A : Swift-XRT observations
  91. Konus-Wind observation of GRB 110428A
  92. GRB 110428A: Fermi-LAT Detection
  93. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  94. GRB 110426A: MAXI/GSC detection of a GRB
  95. GRB 110422A: optical observations in CrAO, second epoch
  96. GRB 110422A: Redshift confirmation from GTC
  97. GRB 110422A: tentative redshift from TNG
  98. GRB 110422A: Suzaku WAM observation of the prompt emission
  99. GRB 110422A: Herschel observation scheduled
  100. GRB110422A: NOT optical follow-ups

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