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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"

36141 results found.

  1. GRB 020331: NIR Observations
  2. GRB 020331: NIR Observations
  3. GRB020331 NIR observation at KPNO (re-submission)
  4. GRB02033 NIR observation at KPNO
  5. GRB020331 field photometry
  6. GRB 020331 Optical Observations
  7. GRB 020331, NIR observations
  8. GRB 020331: Optical observations
  9. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  10. GRB 020321: Infrared observations
  11. GRB 020322: BeppoSAX observations of the X-ray afterglow
  12. SN 2002ap - peak brightness date (SN/GRB?)
  13. GRB 020322, Radio observations
  14. Near-Infrared Observations of GRB020322 at TIRGO
  15. GRB 020321, Radio Observations
  16. GRB 020322: Optical Observations
  17. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  18. GRB 020321: Optical observations
  19. GRB020317 BVRI field photometry
  20. GRB011211 revised BVRI field photometry
  21. GRB020305 BVRI field photometry
  22. GRB020322 BVRI field photometry
  23. GRB 020322 optical observations
  24. GRB 020322 optical observation
  25. GRB020317 : Near IR Observations from Mt Abu Observatory
  26. GRB 020322: Optical Sources and Improved Astrometry
  27. GRB020322, optical observations
  28. GRB 020322: Optical candidate
  29. GRB020322: BeppoSAX/NFI Observations
  30. Bepposax GRB020322 The second springtime BSAX GRB
  31. GRB 020321: Optical observations
  32. GRB 011121: Fourth Epoch of HST Imaging
  33. GRB020317: optical observations
  34. GRB020321 optical observations
  35. GRB020321: BeppoSAX/NFI Observations
  36. GRB020321: a faint BeppoSAX detection
  37. GRB 020317 : KISO Optical Observations
  38. BeppoSAX ALERT: GRB020321, the "Springtime Burst"
  39. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  40. GRB 020305: Optical Observations
  41. GRB020317, optical observations
  42. GRB 020317: Optical observations
  43. GRB 011121: Third HST Epoch
  44. GRB020305: Properties of the Candidate Optical Afterglow
  45. GRB 011121: HST Observations reveal an intermediate-time multicolor
  46. GRB011121, possible supernova association
  47. GRB011130 (XRF011130) Second Epoch Chandra Observations
  48. GRB020305: Subaru Optical Observations
  49. GRB 020305: Optical observations
  50. XRF/GRB 011030 Images
  51. XRF/GRB 011030: Detection of the Probable Host Galaxy
  52. GRB 020305: Candidate optical afterglow
  53. Type Ic SN2002bl (SN/GRB?) Radio Observations
  54. GRB020305: Optical Observations
  55. IPN triangulation of GRB020305 (HETE 1939)
  56. GRB020305 (=H1939): Localization of a GRB by HETE
  57. GRB 020305: Optical observations
  58. HST Imaging of the afterglow and host of GRB 011121
  59. GRB 010921: HST Observations
  60. IPN detection and localization of Cygnus X-1 flares
  61. GRB020127: Further VLA Observations of Possible Counterparts
  62. IPN detection of further SGR1900+14 activity
  63. SGR1900+14 activity
  64. IPN/HETE Detection of Bursts from SGR1900+14
  65. IPN Upper Limits to a GRB Associated With SN2002ap
  66. GRB020124 BVRI field photometry
  67. GRB020127: Comparison of Chandra Epochs and Identification of Possible Counterparts
  68. SN2002ap (SN/GRB?) Echelle spectra
  69. SN2002ap (SN/GRB?) optical spectrographic observations
  70. GRB020127 Optical Observations
  71. SN 2002ap (SN/GRB?)
  72. SN2002ap (SN/GRB?) UBVRI Field Photometry
  73. GRB020127: Chandra Observations and Prospective Counterparts
  74. pre-SN2002ap (SN/GRB?) imaging of M74
  75. SN 2002ap (hypernova / GRB ??): special list on VSNET
  76. Type Ib/c SN2002ap (SN/GRB?)
  77. Type Ib/c SN2002ap (SN/GRB?) Radio Observations
  78. GRB020124, optical observations
  79. GRB020127: Optical observations
  80. GRB 020127, I-band observations starting 3.14-hr after the event
  81. IPN detection of further activity from SGR1806-20
  82. IPN triangulation of GRB020127 (=H1902)
  83. GRB010921 Optical Observations
  84. GRB020127(=H1902): Localization of a Double-Peaked GRB by HETE
  85. GRB020124: Optical observations
  86. VLT observations of GRB 020124: The fading optical/near-infrared afterglow
  87. GRB020124: Optical observations
  88. GRB 020124: Optical observations
  89. GRB 020124 Optical Observations
  90. IPN triangulation of GRB020124 (HETE 1896)
  91. IPN observations of SGR1806-20
  92. GRB 020124: Optical afterglow
  93. GRB020124(=H1896): Localization of a Long GRB by HETE
  94. GRB optical counterpart candidate in GCN 1217 is M dwarf
  95. Possible optical counterpart to a GRB
  96. GRB011212, Optical Observations
  97. GRB 011211: Detection of the Probable Host Galaxy
  98. GRB 011130 and GRB 011212 - Milagro GeV/TeV Observations
  99. GRB 011211, spectrum and optical photometry
  100. GRB 011130: Optical Observations of X-ray and Radio Sources

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