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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"

23690 results found.

  1. GRB 031220 : Kyoto Optical Observation
  2. GRB 031220: Subaru observation
  3. GRB031220: ROTSE-IIIb Optical Limits
  4. GRB 031203 I-band monitoring
  5. IPN triangulation of GRB031214 (short/hard; very intense; small error box)
  6. GRB031203, improved XMM position
  7. GRB 031203: Discovery of a dust echo
  8. GRB 031203: SMARTS optical monitoring
  9. GRB 031203: Variable Radio Source
  10. GRB 031203: Optical/IR Astrometry
  11. IPN/HETE localization of GRB031203B (=H2949; large error box)
  12. XMM-Newton Observation of GRB031203
  13. GRB 031203: Deep NIR NTT & VLT observations
  14. GRB031203: K' Photometry of the likely GRB host
  15. XMM-Newton Observation of GRB031203
  16. GRB 031203: Further reports on December 4 observations
  17. GRB 031203: IR NTTobservations do not confirm REM detection
  18. GRB031203 : Optical Observation of Lulin Observatory
  19. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  20. GRB 031203: Apparent Spectral Break
  21. GRB031203: Planned XMM-Newton observation II
  22. GRB 031203: IR REM Observations
  23. GRB031203: Optical Observations
  24. GRB 031203 XMM-Newton observation
  25. GRB 031203: Optical/IR SMARTS Observations
  26. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  27. GRB 031203: A long GRB detected with INTEGRAL
  28. IPN triangulation of GRB031201 (large error box)
  29. IPN triangulation of GRB031130 (large error box)
  30. IPN triangulation of GRB031120 (two large error boxes)
  31. GRB 031111B (= H2925) : Kyoto Optical Observation
  32. IPN/HETE localization of GRB031109 (=H2917; large error box)
  33. IPN detection of activity from SGR1806-20
  34. GRB 031111, Radio observations
  35. IPN triangulation of GRB031114 (large error box)
  36. IPN triangulation of GRB031107 (two large error boxes)
  37. GRB 031111, optical observations
  38. IPN triangulation of GRB031111 (=H2924): small error box
  39. XRF031109 (=H2919): A very long XRF localized by HETE
  40. IPN triangulation of GRB031108 (large error box)
  41. GRB030929/SN2003jd association unlikely based on IPN localiztion
  42. IPN triangulation of GRB031027 (small error box)
  43. IPN triangulation of GRB031026B (large error box)
  44. Lulin optical follow-up observations of GRB031026
  45. SN 2003jd (SN/GRB?), Radio Observations
  46. GRB 031026: Further Ic Observations
  47. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  48. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  49. IPN triangulation of GRB031024 (single error box)
  50. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  51. GRB 031026: Ic Observations
  52. GRB031026 : KISO optical follow-up observation
  53. IPN triangulation of GRB031024 (annulus)
  54. IPN triangulation of GRB031020 (large error box)
  55. GRB030329: radio observations at RT-22 (CrAO)
  56. Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
  57. XRF 030824: additional observations at CFHT
  58. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  59. SGR 1806-20 bursts with INTEGRAL and IBAS announcement on Soft Gamma-Ray Repeaters
  60. IPN triangulation of GRB031004B (annulus)
  61. IPN triangulation of GRB031004A (short/hard; annulus)
  62. A burst from SGR 1806-20 detected with IBAS
  63. XRF 030824: Early follow-up observation at Kiso observatory
  64. XRF 030824: observations at CFHT
  65. IPN triangulation of GRB030926 (short/hard; large error box)
  66. IPN triangulation of GRB030922B (large error box)
  67. XRF030824 (=H2821): An X-Ray Flash Localized by the HETE WXM
  68. XRF030823 (=H2818): An X-Ray Flash Localized by the HETE WXM and SXC
  69. IPN triangulation of GRB030922A (large error box)
  70. IPN triangulation of GRB030921 (large error box)
  71. IPN triangulation of GRB030919 (large error box)
  72. GRB030913: Subaru Optical Observations
  73. GRB030913: OT's limit by MASTER
  74. GRB 030913, optical candidate
  75. GRB030913: AAVSO optical observations
  76. GRB 030913, BOOTES observations
  77. GRB030913 (=H2849): Confirmation of the Flight Localization
  78. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  79. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  80. GRB030913 (=H2849): A GRB Possibly Localized by HETE
  81. IPN triangulation of GRB030908 (annulus)
  82. GRB 030913: Optical limit at RIKEN
  83. XRF 020427: Gemini-South Spectroscopic Observations of the Host
  84. IPN triangulation of GRB030903 (large error box)
  85. Radio Observations of SGR1806-20
  86. IPN triangulation of GRB030831 (annulus)
  87. IPN triangulation of GRB030830 (large error box)
  88. INTEGRAL ToO OBSERVATIONS OF SGR1806-20: CALL FOR CORRELATED OBSERVATIONS
  89. IPN triangulation of GRB030827 (large error box)
  90. GRB 030823 observation at Ouda
  91. IPN triangulation of GRB030822 (annulus)
  92. GRB 030824: Candidate Afterglow (or Variable/Flare Star?)
  93. GRB030823: optical observation at Tokyo Tech
  94. Lulin follow-up observations of GRB030823
  95. IPN triangulation of GRB030821 (=H2814; refined error box)
  96. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  97. Summary of recent IPN and HETE detections of SGR bursts
  98. IPN triangulation of GRB030814 (annulus)
  99. IPN detection of continued activity from SGR1806-20
  100. GRB 030817 = H2808 TAROT optical observations

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