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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

18515 results found.

  1. Swift J185003.2-005627: TAROT Calern observatory optical observations
  2. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  3. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  4. IPN triangulation of GRB110618A (long duration, extremely intense)
  5. GRB 110610A: 1.23m CAHA optical observations
  6. GRB 110610A: Swift/UVOT Upper Limits
  7. GRB 110610A: Enhanced Swift-XRT position
  8. Swift detection of the X-ray afterglow of GRB 110604A
  9. GRB 110610A: Swift detection of a burst
  10. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  11. GMRT detection of GRB 110328A
  12. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  13. GRB 110530A: Enhanced Swift-XRT position
  14. GRB 110530A: NOT optical observations
  15. GRB110530A: MITSuME Okayama Optical Observation
  16. GRB 110530A: Swift detection of a burst with an optical afterglow
  17. LAT Observations of GRB110529A
  18. EVLA afterglow limits on the high z GRB090429B
  19. Swift J1644+57/GRB 110328A, Additional HST Observations
  20. GRB 110521A: MASTER prompt optical limit
  21. GRB 110521A: Swift/UVOT Upper Limits
  22. GRB 110520A: NOT optical follow-ups
  23. GRB 110521A - NOT optical observation
  24. GRB 110521A: Enhanced Swift-XRT position
  25. GRB 110521A: MASTER synchronous and early optical observations limit
  26. Swift/UVOT observations of GRB110520A
  27. GRB 110521A: Swift detection of a burst
  28. GRB 110520A: IAC80 I-band observations
  29. GRB 110520A: Swift-XRT refined Analysis
  30. GRB 110520A: Enhanced Swift-XRT position
  31. GRB 110520A: WHT IR observations
  32. GRB 110520A - NOT optical observation
  33. GRB 110520A: TAROT Calern observatory optical observations
  34. GRB 110520A: Swift detection of a burst
  35. IPN localization of bright GRB 110518A
  36. GRB 110519A, Swift-BAT refined analysis
  37. GRB 110428A: Fermi-GBM observation
  38. GRB 110503A: TAROT Calern observatory optical observations
  39. GRB 110503A: optical observation in CrAO
  40. GRB 110503A: Centimeter observation from EVLA
  41. GRB 110503A: Millimeter observation from SMA
  42. GRB 110503A: SARA-N Observations and Photometric Calibration
  43. GRB 110503A: Swift/UVOT Observations
  44. GRB 110503A: PAIRITEL NIR Detection
  45. GRB 110503A: Enhanced Swift-XRT position
  46. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  47. GRB 110426A: Swift/XRT non-detection
  48. GRB 110428A : X-ray afterglow confirmation
  49. GRB 110422A: optical observations in CrAO
  50. GRB 110428A : Swift-XRT observations
  51. Konus-Wind observation of GRB 110428A
  52. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  53. GRB 110422A: optical observations in CrAO, second epoch
  54. GRB110422A: NOT optical follow-ups
  55. GRB 110422A: optical observations in CrAO
  56. GRB110422A: MITSuME Ishigakijima Optical Observation
  57. GRB 110422A: Further NOT observation
  58. GRB 110422A: Swift/UVOT Detection of optical afterglow
  59. GRB 110422A: Swift-XRT refined Analysis
  60. GRB 110422A: Enhanced Swift-XRT position
  61. GRB 110422A: TNG optical observations
  62. GRB 110422A: SAO RAS optical observations
  63. GRB 110422A: NOT optical observation
  64. GRB 110422A: Mondy optical observations
  65. GRB 110422A: Swift detection of a burst
  66. GRB 110420B: Swift/UVOT Upper Limits
  67. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  68. GRB 110420B: Swift-XRT afterglow candidate retraction
  69. Konus-Wind observation of GRB 110420A
  70. GRB 110420B, GROND observations
  71. GRB 110420A Swift/UVOT Observations
  72. GRB 110420A: Swift-XRT refined Analysis
  73. GRB 110420A: Enhanced Swift-XRT position
  74. GRB 110420A: Swift detection of a burst with optical counterpart
  75. GRB110414A: MITSuME Ishigakijima Optical upper limits
  76. GRB 110414A: GROND upper limits
  77. GRB110414A: MITSuME Okayama Optical upper limits
  78. GRB 110414A: Swift/UVOT Upper limits
  79. GRB 110414A: Swift-XRT refined Analysis
  80. GRB 110414A: Enhanced Swift-XRT position
  81. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  82. GRB 110414A: Swift detection of a burst
  83. GRB 110411A: PAIRITEL NIR Upper Limits
  84. GRB 110411A: Swift/UVOT Upper Limits
  85. GRB 110411A: Enhanced Swift-XRT position
  86. GRB 110411A: Swift detection of a burst
  87. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  88. GRB110407A: UVOT Upper Limits
  89. GRB 110407A: GROND Detection of the Optical Afterglow
  90. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  91. GRB 110407A: NOT optical observations
  92. GRB 110407A: Enhanced Swift-XRT position
  93. IPN triangulation of the bright GRB110406A
  94. GRB 110407A: Swift detection of a burst
  95. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  96. GRB 110402A: fading optical afterglow
  97. ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011
  98. GRB 110328A / Swift J164449.3+573451, HST Observations
  99. GRB 110402A: optical observations in Mondy
  100. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits

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