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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').
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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"

37161 results found.

  1. GRB031203: K' Photometry of the likely GRB host
  2. GRB 031203: Radio detection
  3. GRB 031203: Further reports on December 4 observations
  4. GRB 031203: IR NTTobservations do not confirm REM detection
  5. GRB031203 : Optical Observation of Lulin Observatory
  6. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  7. GRB 031203: Apparent Spectral Break
  8. GRB 031203: IR REM Observations
  9. GRB031203: Optical Observations
  10. GRB 031203 XMM-Newton observation
  11. GRB 031203: Optical/IR SMARTS Observations
  12. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  13. GRB 031203: further analysis of INTEGRAL data
  14. GRB 031203: A long GRB detected with INTEGRAL
  15. IPN triangulation of GRB031201 (large error box)
  16. IPN triangulation of GRB031130 (large error box)
  17. GRB031111A, prompt optical observations
  18. GRB 030329: Planned XMM-Newton Observation
  19. IPN triangulation of GRB031120 (two large error boxes)
  20. GRB 031111B (= H2925) : Kyoto Optical Observation
  21. IPN/HETE localization of GRB031109 (=H2917; large error box)
  22. IPN detection of activity from SGR1806-20
  23. GRB 031111, Radio observations
  24. IPN triangulation of GRB031114 (large error box)
  25. IPN triangulation of GRB031107 (two large error boxes)
  26. GRB 031111: Optical observations
  27. GRB 031111, optical observations
  28. SN 2003jd (SN/GRB?) -- X-ray Observations
  29. HETE Prompt GRB Spectral Analyses
  30. IPN triangulation of GRB031111 (=H2924): small error box
  31. XRF031109 (=H2919): A very long XRF localized by HETE
  32. IPN triangulation of GRB031108 (large error box)
  33. GRB030929/SN2003jd association unlikely based on IPN localiztion
  34. IPN triangulation of GRB031027 (small error box)
  35. IPN triangulation of GRB031026B (large error box)
  36. SN 2003jd (SN/GRB?), Radio Observations
  37. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  38. GRB 031026: Further Ic Observations
  39. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  40. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  41. IPN triangulation of GRB031024 (single error box)
  42. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  43. GRB 031026: Ic Observations
  44. GRB031026 : KISO optical follow-up observation
  45. IPN triangulation of GRB031024 (annulus)
  46. IPN triangulation of GRB031020 (large error box)
  47. IPN triangulation of GRB031016 (two large error boxes)
  48. IBAS alert 1180 refers to a burst from SGR 1806-20
  49. HETE Prompt GRB Light Curves and Color-Color Diagrams
  50. IPN triangulation of GRB031014 (annulus)
  51. Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
  52. XRF 030824: additional observations at CFHT
  53. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  54. IPN triangulation of GRB031008 (annulus)
  55. IPN detection of continued activity from SGR1806-20
  56. IPN triangulation of GRB031007 (two large error boxes)
  57. XRF 030723: Subaru Optical Observations
  58. IPN triangulation of GRB031004B (annulus)
  59. IPN triangulation of GRB031004A (short/hard; annulus)
  60. IPN triangulation of GRB030929 (short/hard; annulus)
  61. XRF 030824: Early follow-up observation at Kiso observatory
  62. XRF 030824: observations at CFHT
  63. IPN triangulation of GRB030926 (short/hard; large error box)
  64. IPN triangulation of GRB030922B (large error box)
  65. IPN triangulation of GRB030922A (large error box)
  66. IPN triangulation of GRB030921 (large error box)
  67. IPN triangulation of GRB030919 (large error box)
  68. GRB030922 triangulation (annulus)
  69. GRB030913: Subaru Optical Observations
  70. GRB 030913: ROTSE-3c Optical Observations
  71. GRB030913: OT's limit by MASTER
  72. GRB030921 triangulation (annulus)
  73. GRB030913, candidate afterglow observations
  74. GRB 030913, optical candidate
  75. GRB 030913, BOOTES observations
  76. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  77. GRB030913 (=H2849): TAROT Observations
  78. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  79. Magellan Observations of GRB030725 (=H2779)
  80. GRB030913 (=H2849): A GRB Possibly Localized by HETE
  81. IPN triangulation of GRB030908 (annulus)
  82. GRB 030913: Optical limit at RIKEN
  83. XRF030824: Optical observations
  84. IPN triangulation of GRB030903 (large error box)
  85. IBAS detection of bursts from SGR 1806-20
  86. IPN triangulation of GRB030831 (annulus)
  87. IPN triangulation of GRB030830 (large error box)
  88. GRB 030824: Candidate Follow-Up
  89. IPN triangulation of GRB030827 (large error box)
  90. GRB 030823 observation at Ouda
  91. XRF030824: Second-epoch Palomar observations
  92. IPN triangulation of GRB030822 (annulus)
  93. GRB030823: Palomar observations
  94. XRF030824: Palomar observations
  95. GRB 030824: Candidate Afterglow (or Variable/Flare Star?)
  96. RAPTOR observations of GRB030823
  97. IPN triangulation of GRB030821 (=H2814; refined error box)
  98. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  99. Summary of recent IPN and HETE detections of SGR bursts
  100. IPN triangulation of GRB030814 (annulus)

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