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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"

37565 results found.

  1. IPN triangulation of GRB031026B (large error box)
  2. SN 2003jd (SN/GRB?), Radio Observations
  3. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  4. GRB 031026: Further Ic Observations
  5. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  6. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  7. IPN triangulation of GRB031024 (single error box)
  8. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  9. GRB 031026: Ic Observations
  10. GRB031026 : KISO optical follow-up observation
  11. IPN triangulation of GRB031024 (annulus)
  12. IPN triangulation of GRB031020 (large error box)
  13. IPN triangulation of GRB031016 (two large error boxes)
  14. IBAS alert 1180 refers to a burst from SGR 1806-20
  15. HETE Prompt GRB Light Curves and Color-Color Diagrams
  16. IPN triangulation of GRB031014 (annulus)
  17. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  18. IPN triangulation of GRB031008 (annulus)
  19. IPN detection of continued activity from SGR1806-20
  20. IPN triangulation of GRB031007 (two large error boxes)
  21. XRF 030723: Subaru Optical Observations
  22. IPN triangulation of GRB031004B (annulus)
  23. IPN triangulation of GRB031004A (short/hard; annulus)
  24. IPN triangulation of GRB030929 (short/hard; annulus)
  25. XRF 030824: Early follow-up observation at Kiso observatory
  26. XRF 030824: observations at CFHT
  27. IPN triangulation of GRB030926 (short/hard; large error box)
  28. IPN triangulation of GRB030922B (large error box)
  29. IPN triangulation of GRB030922A (large error box)
  30. IPN triangulation of GRB030921 (large error box)
  31. IPN triangulation of GRB030919 (large error box)
  32. GRB030922 triangulation (annulus)
  33. GRB030913: Subaru Optical Observations
  34. GRB 030913: ROTSE-3c Optical Observations
  35. GRB030913: OT's limit by MASTER
  36. GRB030921 triangulation (annulus)
  37. GRB030913, candidate afterglow observations
  38. GRB 030913, optical candidate
  39. GRB 030913, BOOTES observations
  40. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  41. GRB030913 (=H2849): TAROT Observations
  42. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  43. Magellan Observations of GRB030725 (=H2779)
  44. GRB030913 (=H2849): A GRB Possibly Localized by HETE
  45. IPN triangulation of GRB030908 (annulus)
  46. GRB 030913: Optical limit at RIKEN
  47. XRF030824: Optical observations
  48. IPN triangulation of GRB030903 (large error box)
  49. IPN triangulation of GRB030831 (annulus)
  50. IPN triangulation of GRB030830 (large error box)
  51. GRB 030824: Candidate Follow-Up
  52. IPN triangulation of GRB030827 (large error box)
  53. GRB 030823 observation at Ouda
  54. XRF030824: Second-epoch Palomar observations
  55. IPN triangulation of GRB030822 (annulus)
  56. GRB030823: Palomar observations
  57. XRF030824: Palomar observations
  58. GRB 030824: Candidate Afterglow (or Variable/Flare Star?)
  59. IPN triangulation of GRB030821 (=H2814; refined error box)
  60. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  61. Summary of recent IPN and HETE detections of SGR bursts
  62. IPN triangulation of GRB030814 (annulus)
  63. IPN detection of continued activity from SGR1806-20
  64. 030813 SGR event (Konus-Wind observation)
  65. GRB 030817 = H2808 TAROT optical observations
  66. SGR 1808-20 (=H2802): A Possible new SGR
  67. GRB 021206 Optical Observations
  68. IPN triangulation of GRB030808 (two large error boxes)
  69. IPN triangulation of GRB030806 (large burst; large error box)
  70. XRF030723(=H2777): Chandra Fading X-ray Afterglow Confirmed
  71. IPN/HETE summary of recent bursts from SGR1806-20
  72. XRF 030723: Detection of a rebrightening in the optical afterglow
  73. GRB030725: Optical observations
  74. XRF030723, BVRcIc field photometry update
  75. IPN triangulation of GRB030801 (large error box)
  76. GRB021206 optical counterpart upper limit
  77. IPN triangulation of GRB030731 (annulus)
  78. IBAS GRB Alerts 1011-1017 NOT CONFIRMED
  79. IPN triangulation of GRB030725 (=H2779; small error box)
  80. XRF030723 (=H2777): Second Epoch Magellan Observations
  81. GRB 030725: optical observations.
  82. GRB030725, optical transient observations
  83. IPN triangulation of GRB030726 (large error box)
  84. IPN triangulation of GRB030722 (large error box)
  85. IPN triangulation of GRB030721 (large error box)
  86. XRF030723 Radio Observations
  87. XRF030723(=H2777): Chandra Observations
  88. Magellan Observations of XRF030723 (=H2777)
  89. GRB030723: Upper limits from historical observations
  90. GRB030725, possible optical transient
  91. XRF030723: Palomar observations and proposed counterpart
  92. GRB030725 (=H2779): A Bright GRB Localized by HETE
  93. XRF030723: optical observations
  94. XRF030723 (= H2777): Chandra Observations Scheduled
  95. XRF030723, BVRcIc field photometry
  96. XRF030723, optical observations
  97. GRB030723, optical observations
  98. IBAS GRB Alerts 969 970
  99. IPN triangulation of GRB030717 (annulus)
  100. GRB030329: Subaru Optical Spectroscopy

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