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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"

42941 results found.

  1. GRB031220 : Optical Observation of Lulin Observatory
  2. GRB 031203 I-band monitoring
  3. IPN triangulation of GRB031214 (short/hard; very intense; small error box)
  4. GRB 2974 follow-up observations
  5. GRB031203, improved XMM position
  6. GRB 031203: Discovery of a dust echo
  7. GRB031214 triangulation (annulus), [repost of GCN2487, subject corrected]
  8. GRB030921 triangulation (annulus)
  9. GRB 031203: SMARTS optical monitoring
  10. GRB 021203: A Normal GRB viewed far off axis?
  11. GRB 031203: Variable Radio Source
  12. GRB 031203: Magellan spectrum of possible GRB host
  13. GRB 031203: Optical/IR Astrometry
  14. IPN/HETE localization of GRB031203B (=H2949; large error box)
  15. GRB031203 K prime photometry: correction to galaxy coordinates
  16. GRB031203: ROSAT upper limits suggest XMM-S1 source as the transient
  17. XMM-Newton Observation of GRB031203
  18. GRB 031203: Deep NIR NTT & VLT observations
  19. GRB031203: K' Photometry of the likely GRB host
  20. XMM-Newton Observation of GRB031203
  21. GRB 031203: Radio detection
  22. GRB 031203: Further reports on December 4 observations
  23. GRB 031203: IR NTTobservations do not confirm REM detection
  24. GRB031203 : Optical Observation of Lulin Observatory
  25. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  26. GRB 031203: Apparent Spectral Break
  27. GRB031203: Planned XMM-Newton observation II
  28. GRB 031203: IR REM Observations
  29. GRB031203: Optical Observations
  30. GRB 031203 XMM-Newton observation
  31. GRB 031203: Optical/IR SMARTS Observations
  32. GRB031203: Planned XMM-Newton observation
  33. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  34. GRB 031203: further analysis of INTEGRAL data
  35. GRB 031203: A long GRB detected with INTEGRAL
  36. IPN triangulation of GRB031201 (large error box)
  37. IPN triangulation of GRB031130 (large error box)
  38. GRB031111A, prompt optical observations
  39. IPN triangulation of GRB031120 (two large error boxes)
  40. GRB 031111B (= H2925) : Kyoto Optical Observation
  41. IPN/HETE localization of GRB031109 (=H2917; large error box)
  42. IPN detection of activity from SGR1806-20
  43. GRB 031111, Radio observations
  44. IPN triangulation of GRB031114 (large error box)
  45. IPN triangulation of GRB031107 (two large error boxes)
  46. GRB 031111: Optical observations
  47. GRB 031111, optical observations
  48. SN 2003jd (SN/GRB?) -- X-ray Observations
  49. HETE Prompt GRB Spectral Analyses
  50. IPN triangulation of GRB031111 (=H2924): small error box
  51. XRF031109 (=H2919): A very long XRF localized by HETE
  52. IPN triangulation of GRB031108 (large error box)
  53. GRB031026: 1.2mm upper limit with MAMBO at the IRAM 30m
  54. GRB030929/SN2003jd association unlikely based on IPN localiztion
  55. IPN triangulation of GRB031027 (small error box)
  56. IPN triangulation of GRB031026B (large error box)
  57. Lulin optical follow-up observations of GRB031026
  58. SN 2003jd (SN/GRB?), Radio Observations
  59. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  60. GRB 031026: Further Ic Observations
  61. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  62. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  63. IPN triangulation of GRB031024 (single error box)
  64. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  65. GRB031026 : KISO optical follow-up observation
  66. IPN triangulation of GRB031024 (annulus)
  67. IPN triangulation of GRB031020 (large error box)
  68. GRB030329: radio observations at RT-22 (CrAO)
  69. IPN triangulation of GRB031016 (two large error boxes)
  70. IBAS alert 1180 refers to a burst from SGR 1806-20
  71. HETE Prompt GRB Light Curves and Color-Color Diagrams
  72. IPN triangulation of GRB031014 (annulus)
  73. Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
  74. XRF 030824: additional observations at CFHT
  75. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  76. IPN triangulation of GRB031008 (annulus)
  77. SGR 1806-20 bursts with INTEGRAL and IBAS announcement on Soft Gamma-Ray Repeaters
  78. IPN detection of continued activity from SGR1806-20
  79. IPN triangulation of GRB031007 (two large error boxes)
  80. XRF 030723: Subaru Optical Observations
  81. IPN triangulation of GRB031004B (annulus)
  82. IPN triangulation of GRB031004A (short/hard; annulus)
  83. IPN triangulation of GRB030929 (short/hard; annulus)
  84. A burst from SGR 1806-20 detected with IBAS
  85. XRF 030824: Early follow-up observation at Kiso observatory
  86. XRF 030824: observations at CFHT
  87. IPN triangulation of GRB030926 (short/hard; large error box)
  88. IPN triangulation of GRB030922B (large error box)
  89. XRF030824 (=H2821): An X-Ray Flash Localized by the HETE WXM
  90. XRF030823 (=H2818): An X-Ray Flash Localized by the HETE WXM and SXC
  91. IPN triangulation of GRB030922A (large error box)
  92. IPN triangulation of GRB030921 (large error box)
  93. IPN triangulation of GRB030919 (large error box)
  94. GRB030922 triangulation (annulus)
  95. GRB030913: Subaru Optical Observations
  96. GRB 030913: ROTSE-3c Optical Observations
  97. GRB030921 triangulation (annulus)
  98. GRB030913, candidate afterglow observations
  99. GRB 030913, optical candidate
  100. GRB030913: AAVSO optical observations

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