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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"

45679 results found.

  1. IPN detection of continued activity from SGR1806-20
  2. IPN triangulation of GRB031007 (two large error boxes)
  3. XRF 030723: Subaru Optical Observations
  4. IPN triangulation of GRB031004B (annulus)
  5. IPN triangulation of GRB031004A (short/hard; annulus)
  6. IPN triangulation of GRB030929 (short/hard; annulus)
  7. A burst from SGR 1806-20 detected with IBAS
  8. XRF 030824: Early follow-up observation at Kiso observatory
  9. XRF 030824: observations at CFHT
  10. IPN triangulation of GRB030926 (short/hard; large error box)
  11. IPN triangulation of GRB030922B (large error box)
  12. XRF 030723: Detection of the likely host galaxy
  13. XRF030824 (=H2821): An X-Ray Flash Localized by the HETE WXM
  14. XRF030823 (=H2818): An X-Ray Flash Localized by the HETE WXM and SXC
  15. IPN triangulation of GRB030922A (large error box)
  16. IPN triangulation of GRB030921 (large error box)
  17. IPN triangulation of GRB030919 (large error box)
  18. GRB030922 triangulation (annulus)
  19. GRB030913: Subaru Optical Observations
  20. GRB 030913: ROTSE-3c Optical Observations
  21. GRB030913: OT's limit by MASTER
  22. GRB030921 triangulation (annulus)
  23. GRB030913, candidate afterglow observations
  24. GRB 030913, optical candidate
  25. GRB030913: AAVSO optical observations
  26. GRB 030913, BOOTES observations
  27. GRB030913 (=H2849): Confirmation of the Flight Localization
  28. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  29. GRB030913 (=H2849): TAROT Observations
  30. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  31. Magellan Observations of GRB030725 (=H2779)
  32. GRB030913 (=H2849): A GRB Possibly Localized by HETE
  33. IPN triangulation of GRB030908 (annulus)
  34. GRB 030913: Optical limit at RIKEN
  35. XRF 020427: Gemini-South Spectroscopic Observations of the Host
  36. XRF030824: Optical observations
  37. IPN triangulation of GRB030903 (large error box)
  38. IBAS detection of bursts from SGR 1806-20
  39. Radio Observations of SGR1806-20
  40. IPN triangulation of GRB030831 (annulus)
  41. IPN triangulation of GRB030830 (large error box)
  42. GRB 030824: Candidate Follow-Up
  43. INTEGRAL ToO OBSERVATIONS OF SGR1806-20: CALL FOR CORRELATED OBSERVATIONS
  44. IPN triangulation of GRB030827 (large error box)
  45. GRB 030823 observation at Ouda
  46. XRF030824: Second-epoch Palomar observations
  47. XRF030824: optical observations
  48. IPN triangulation of GRB030822 (annulus)
  49. GRB030823: optical observations
  50. GRB030823: Palomar observations
  51. XRF030824: Palomar observations
  52. GRB 030824: Candidate Afterglow (or Variable/Flare Star?)
  53. GRB030823: optical observation at Tokyo Tech
  54. RAPTOR observations of GRB030823
  55. Lulin follow-up observations of GRB030823
  56. IPN triangulation of GRB030821 (=H2814; refined error box)
  57. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  58. Summary of recent IPN and HETE detections of SGR bursts
  59. IPN triangulation of GRB030814 (annulus)
  60. Clarification of GCN 2354 on SGR1806-20
  61. IPN detection of continued activity from SGR1806-20
  62. 030813 SGR event (Konus-Wind observation)
  63. GRB 030817 = H2808 TAROT optical observations
  64. SGR 1808-20 (=H2802): A Possible new SGR
  65. GRB 021206 Optical Observations
  66. IPN triangulation of GRB030808 (two large error boxes)
  67. IPN triangulation of GRB030806 (large burst; large error box)
  68. XRF030723(=H2777): Chandra Fading X-ray Afterglow Confirmed
  69. IPN/HETE summary of recent bursts from SGR1806-20
  70. XRF 030723: Detection of a rebrightening in the optical afterglow
  71. GRB030725: Optical observations
  72. XRF030723, BVRcIc field photometry update
  73. IPN triangulation of GRB030801 (large error box)
  74. GRB021206 optical counterpart upper limit
  75. IPN triangulation of GRB030731 (annulus)
  76. IBAS GRB Alerts 1011-1017 NOT CONFIRMED
  77. XRF030723: Re-analysis of ROTSE-III early images
  78. IPN triangulation of GRB030725 (=H2779; small error box)
  79. XRF030723 (=H2777): Second Epoch Magellan Observations
  80. GRB 030725: optical observations.
  81. GRB030725, optical transient observations
  82. IPN triangulation of GRB030726 (large error box)
  83. IPN triangulation of GRB030722 (large error box)
  84. IPN triangulation of GRB030721 (large error box)
  85. XRF030723 Radio Observations
  86. XRF 030723: confirmation of fading optical counterpart
  87. XRF030723(=H2777): Chandra Observations
  88. XRF 030723: VLT spectra
  89. Magellan Observations of XRF030723 (=H2777)
  90. GRB030723: Upper limits from historical observations
  91. GRB030725, possible optical transient
  92. XRF030723: Palomar observations and proposed counterpart
  93. GRB030725 (=H2779): A Bright GRB Localized by HETE
  94. XRF030723: optical observations
  95. XRF030723 (= H2777): Chandra Observations Scheduled
  96. XRF030723, BVRcIc field photometry correction
  97. XRF030723, ROTSE-III Early Observations
  98. XRF030723, BVRcIc field photometry
  99. XRF 030723, optical observations
  100. XRF030723, optical observations

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