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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"

23620 results found.

  1. GRB040924: MASTER: OT decay
  2. GRB040924: MASTER Optical observations
  3. IPN triangulation of GRB040924 (H3564)
  4. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  5. XRF 040912: Radio Observations
  6. XRF 040916: Radio Observations
  7. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  8. XRF040916: continuing decay of OT
  9. TAROT Observations of GRB 040916 (HETE #3558)
  10. GRB040912(=H3557): Candidate Optical Afterglow
  11. XRF 040912, identification of CXO sources
  12. XRF 040912 (=H3557): Spectral and Temporal Properties
  13. XRF040912, BVRcIc field calibration
  14. XRF040916, BVRcIc field calibration
  15. XRF 040916, optical follow-up
  16. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  17. GRB040916 (= H3558): Improved Localization from HETE WXM
  18. GRB040916 (= H3558): A Long XRF Localized by HETE
  19. GRB 040912, BVRI observations
  20. Optical observations of GRB/XRF 040912 = HETE 3557
  21. An intense burst from SGR1806-20
  22. GRB040912 : Kiso Optical follow-up observation
  23. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  24. Very bright burst detected from SGR 1806-20
  25. XMM-Newton Images of GRB 040827
  26. GRB 040827: 2nd epoch of Magellan K-band imaging
  27. GRB 040827: K imaging - no evidence of variability
  28. GRB 040827: Detection of NIR afterglow
  29. GRB 040827: RTT150 optical observations
  30. GRB040825A: optical limit before GRB
  31. MASTER: GRB040827 possible OT
  32. GRB 040825B: Optical observations
  33. GRB 040827 : peak flux
  34. GRB040825B, BVRcIc field photometry
  35. GRB040825A, BVRcIc field photometry
  36. Increase of SGR 1806-20 activity
  37. GRB040825B (=H3510): An XRF Localized in Real Time by HETE
  38. GRB 040825A: Optical observations.
  39. XRF 040812: optical observation at VLT
  40. GRB 040812: Optical counterparts of CXO sources
  41. CXO observation of GRB 040812
  42. IPN/HETE localizations of GRB040810 (=H3489)
  43. GRB 040812: Keck and LCO optical observations
  44. GRB 040812: Keck and LCO observations
  45. GRB 040812: radio observations
  46. GRB040812, optical/IR observations
  47. GRB 040812: a long GRB detected by INTEGRAL
  48. GRB 040810: Optical observations of a limited region
  49. XRF040701: Optical Observations at ESO
  50. IPN/HETE triangulation of GRB040802 (=H3485)
  51. GRB 040730, infrared observations
  52. GRB 040730: Optical observations
  53. GRB 040730: a long GRB detected with INTEGRAL
  54. Ongoing activity of SGR 1806-20
  55. GRB040624: optical monitoring at TNG
  56. XRF 040701 - optical observations of the decaying Chandra source
  57. XRF040701: Second-Epoch Chandra Observations
  58. XRF040701: Magellan Spectroscopy of Chandra Source #2 Associated Galaxy
  59. XRF040701: First-Epoch Chandra Observations
  60. XRF 040701, optical observations
  61. XRF040701 (=U11548): a bright XRF detected by HETE
  62. GRB 040624: optical observations at TNG and VLT
  63. MASTER: GRB 040624 optical observation after 0,48d
  64. GRB 040624: R-band observations
  65. GRB 040624, optical observations
  66. GRB 040624 - A long GRB detected with INTEGRAL
  67. GRB 030329: Rebrightening of hyperluminal ejecta.
  68. IPN Summary of SGR1806-20 Activity in 2004
  69. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  70. SGR 1806-20, potential NIR counterpart
  71. MASTER: HETE Alert 3274 optical observation
  72. Activivty of SGR 1806-20
  73. IPN triangulation of an intense intermediate burst from SGR1806-20
  74. GRB 040511, very fast decay?
  75. GRB 030324: Detection and Color of Host Galaxy
  76. GRB 040511: NIR observations with REM
  77. GRB040511: Redshift identifcation
  78. GRB 040511: Optical observations
  79. GRB040511: Optical Observations
  80. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  81. Type Ic SN2001em (off-axis GRB jet?), optical spectrum
  82. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  83. IPN triangulation of GRB040425 (=H3183)
  84. On Line Availability of Archival HETE Fregate Data and Lightcurves
  85. GRB040422: optical observations at Xinglong Observatory
  86. GRB040422: optical observations at CrAO
  87. GRB 040423 (=H3175): A Long GRB Localized by HETE
  88. GRB040422 : I-band follow-up observation at Lulin Observatory
  89. GRB040422, BVRcIc field calibration
  90. GRB 040422: a long GRB detected with INTEGRAL
  91. GRB 040403, deep optical observations
  92. MASTER: HETE Alert 3163, 3167 technical optical observation
  93. INTEGRAL-SPI/ACS GRB data: timing correction
  94. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  95. GRB 040403 Optical Observations
  96. GRB 040403: optical observations
  97. GRB 040403: Optical Observations
  98. GRB 040403: a long GRB detected with INTEGRAL
  99. Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
  100. GRB040323: NIR Observations and Variable Object

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