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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"

37576 results found.

  1. GRB 040912: Optical Observations
  2. GRB/XRF040912,optical observations
  3. GRB 040912, BVRI observations
  4. Optical observations of GRB/XRF 040912 = HETE 3557
  5. An intense burst from SGR1806-20
  6. IBAS GRB Alerts 1978-1980
  7. Optical observations of field of GRB040912
  8. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  9. GRB 040827: XMM-Newton data
  10. GRB040903 - A XRF?
  11. GRB040827: analysis of the XMM-Newton observation
  12. GRB 040903 - INTEGRAL data analysis
  13. IBAS Alert 1974. Not a real GRB
  14. Very bright burst detected from SGR 1806-20
  15. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  16. Possible GRB 040903 - further analysis
  17. Possible GRB 040903 detected with INTEGRAL
  18. GRB 040827 - Radio Observations
  19. XMM-Newton Images of GRB 040827
  20. GRB 040827: optical and NIR observations at the VLT
  21. GRB 040827: UKIRT - 2nd epoch K-band imaging
  22. GRB 040827: 2nd epoch of Magellan K-band imaging
  23. GRB 040827: K imaging - no evidence of variability
  24. GRB 040827: Detection of NIR afterglow
  25. GRB 040827: Possible detection of optical afterglow
  26. GRB 040827: RTT150 optical observations
  27. GRB040825A: optical limit before GRB
  28. GRB 040825B: Optical observations
  29. GRB040827 optical observations
  30. GRB 040827 : Planned XMM-Newton observation
  31. GRB 040827 - Refined position
  32. GRB 040827 : peak flux
  33. GRB 040827 - A long GRB detected by INTEGRAL
  34. GRB040825B, BVRcIc field photometry
  35. GRB040825A, BVRcIc field photometry
  36. GCN GRB OBSERBATION REPORT
  37. GRB 040825A,optical observations
  38. Increase of SGR 1806-20 activity
  39. GRB 040825A: Optical observations.
  40. GRB040825B: Correction to GCN 2657
  41. GRB 040825: Optical observations
  42. GRB 040812: Second epoch CXO Observations
  43. GRB040823,optical observation
  44. Triangulation of GRB 040816 (Konus-Wind - Helicon-Coronas-F)
  45. XRF 040812: optical observation at VLT
  46. GRB 040812: Optical counterparts of CXO sources
  47. XRF040812: possible afterglow
  48. CXO observation of GRB 040812
  49. IPN/HETE localizations of GRB040810 (=H3489)
  50. GRB 040812: Keck and LCO optical observations
  51. GRB 040812: Keck and LCO observations
  52. GRB 040812: radio observations
  53. GRB040812, optical/IR observations
  54. Konus-Wind observation of GRB040810 (=H3489)
  55. GRB 040812: a long GRB detected by INTEGRAL
  56. GRB 040810: Optical observations of a limited region
  57. IPN/HETE triangulation of GRB040802 (=H3485)
  58. GRB 040730, infrared observations
  59. GRB 040730: Optical observations
  60. GRB 040730: a long GRB detected with INTEGRAL
  61. Ongoing activity of SGR 1806-20
  62. GRB040624: optical monitoring at TNG
  63. Cancellation of IBAS/INTEGRAL GRB alerts
  64. IBAS Alert 1836: NOT a real GRB
  65. GRB040709 J,H-band observations
  66. GRB 040624: optical observations
  67. GRB 040624: optical observations at TNG and VLT
  68. MASTER: GRB 040624 optical observation after 0,48d
  69. GRB 040624: R-band observations
  70. GRB 040624, optical observations
  71. GRB 040624 - A long GRB detected with INTEGRAL
  72. GRB 030329: Rebrightening of hyperluminal ejecta.
  73. IPN Summary of SGR1806-20 Activity in 2004
  74. GRB040511: Retraction of redshift identification
  75. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  76. GRB 040606: Optical observations
  77. MASTER: HETE Alert 3274 optical observation
  78. Activivty of SGR 1806-20
  79. IPN triangulation of an intense intermediate burst from SGR1806-20
  80. GRB 040511, very fast decay?
  81. GRB 030324: Detection and Color of Host Galaxy
  82. GRB 040511: NIR observations with REM
  83. GRB040511: Redshift identifcation
  84. GRB 040511: Optical limit
  85. IBAS GRB Alerts n.1785 to 1791
  86. GRB 040511: ROTSE-III Rapid Optical Upper Limits
  87. GRB 040511: Second Epoch Optical Observations
  88. IBAS GRB Alerts 1781-4
  89. GRB 040511: Optical observations
  90. GRB 040511: Optical Observations
  91. GRB040511: Optical Observations
  92. GRB040511: Optical Observations
  93. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  94. IBAS GRB Alert number 1774: NOT a real GRB
  95. Type Ic SN2001em (off-axis GRB jet?), optical spectrum
  96. IBAS Alerts 1771 and 1772: NOT a real GRB
  97. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  98. IPN triangulation of GRB040425 (=H3183)
  99. GRB040422: optical observations at CrAO
  100. GRB 040423 (=H3175): A Long GRB Localized by HETE

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