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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"

37162 results found.

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

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