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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"

42942 results found.

  1. Activivty of SGR 1806-20
  2. IPN triangulation of an intense intermediate burst from SGR1806-20
  3. GRB 040511, very fast decay?
  4. GRB 030324: Detection and Color of Host Galaxy
  5. GRB 040511: NIR observations with REM
  6. GRB040511: Redshift identifcation
  7. GRB 040511: Optical limit
  8. GRB040511: Candidate optical/NIR afterglow
  9. IBAS GRB Alerts n.1785 to 1791
  10. GRB 040511: ROTSE-III Rapid Optical Upper Limits
  11. GRB 040511: Second Epoch Optical Observations
  12. IBAS GRB Alerts 1781-4
  13. GRB 040511: Optical observations
  14. GRB 040511: Optical Observations
  15. GRB040511: Optical Observations
  16. GRB040511: Optical Observations
  17. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  18. IBAS GRB Alert number 1774: NOT a real GRB
  19. Type Ic SN2001em (off-axis GRB jet?), optical spectrum
  20. IBAS Alerts 1771 and 1772: NOT a real GRB
  21. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  22. IPN triangulation of GRB040425 (=H3183)
  23. On Line Availability of Archival HETE Fregate Data and Lightcurves
  24. GRB040422: optical observations at Xinglong Observatory
  25. GRB040422: optical observations at CrAO
  26. GRB 040423 (=H3175): A Long GRB Localized by HETE
  27. GRB040422, optical observations at Loiano
  28. GRB040422 : I-band follow-up observation at Lulin Observatory
  29. GRB 040422: ROTSE-IIIb Prompt Optical Limits
  30. GRB040422, BVRcIc field calibration
  31. GRB040422: optical and NIR observations at the VLT
  32. GRB 040422: a long GRB detected with INTEGRAL
  33. GRB 040403, deep optical observations
  34. MASTER: HETE Alert 3163, 3167 technical optical observation
  35. INTEGRAL-SPI/ACS GRB data: timing correction
  36. IBAS GRB alerts 1739, 1740, 1741
  37. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  38. GRB 040403: Optical Observations
  39. GRB 040403: Optical observations
  40. GRB 040403: optical observations
  41. GRB 040403: Optical Observations
  42. GRB 040403: a long GRB detected with INTEGRAL
  43. Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
  44. GRB 040329: hard burst detected by Konus-Wind and Helicon - Coronas-F
  45. IBAS GRB Alert 1694
  46. GRB040323: NIR Observations and Variable Object
  47. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  48. GRB 040323, a dark GRB ?
  49. short hard GRB 040322
  50. GRB 040323: a long GRB detected with INTEGRAL
  51. IBAS GRB alerts 1679, 1680, 1681
  52. GRB 040223: XMM-Newton results
  53. IBAS Alert 1678: not a GRB
  54. GRB 031203: spectoscopic evidence for a 1998bw-like SN
  55. GRB 031203, possible supernova
  56. MASTER: RXTE GRB040308 optical observation
  57. IBAS results on a burst from SGR1806-20
  58. INTEGRAL detection of activity from SGR1806-20
  59. RXTE GRB040229 optical observation: no candidate
  60. GRB 040228 Optical observations
  61. IPN triangulation of GRB040228 (H3066, H3067)
  62. GRB040228 : KISO optical follow-up observation
  63. GRB 040228 (=H3066?,=H3067?): A Long GRB Localized by the HETE-2 WXM
  64. GRB 040223: Deep NIR NTT observations
  65. GRB 040223 : Optical observation (non-detection)
  66. XMM-Newton Images of GRB 040223
  67. GRB 040223, VLA observations
  68. GRB 040223: REM IJK Observations
  69. GRB 040223 XMM-Newton observation ...
  70. GRB 031203 XMM-Newton observation
  71. GRB 040223: further offline analysis
  72. GRB 040223: a long GRB detected with INTEGRAL
  73. GRB031111, optical observations
  74. GRB031220: 2nd Chandra observation and X-ray afterglow candidate
  75. GRB031203: Chandra Observations
  76. GRB040106, follow-up radio observations
  77. GRB040106: refined X-ray transient position
  78. Follow-up on IBAS GRB Alert 1379
  79. IBAS GRB alert 1379
  80. SN 2003dh/GRB030329 late-time optical spectroscopy
  81. GRB040106, Radio Observations
  82. GRB040106, likely optical afterglow
  83. GRB040106: Second Epoch Optical Observations
  84. GRB 031220: Optical observations of Chandra X-ray sources
  85. XMM-Newton Images of GRB 040106
  86. GRB040106: optical observations with REM+ROSS
  87. GRB031220: observation at Univercity of Miyazaki
  88. GRB 040106: Optical observations
  89. XMM-Newton observation of GRB040106
  90. GRB 040106 : peak flux
  91. GRB 040106 : a long GRB detected with INTEGRAL
  92. IPN triangulation of an intermediate burst from SGR1806-20
  93. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  94. GRB031220(=H2976): Observation with the Chandra X-ray Observatory
  95. GRB031225a triangulation (annulus)
  96. IPN triangulation of GRB031219 (large error box)
  97. GRB031220: Palomar Observations
  98. GRB 031220 : Kyoto Optical Observation
  99. GRB 031220: Subaru observation
  100. GRB 031220: Optical observation at Tokyo Tech

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