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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"

19681 results found.

  1. Lulin follow-up observations of GRB030823
  2. GRB 030817 = H2808 TAROT optical observations
  3. SGR 1808-20 (=H2802): A Possible new SGR
  4. XRF030723(=H2777): Chandra Fading X-ray Afterglow Confirmed
  5. XRF030723, BVRcIc field photometry update
  6. IPN triangulation of GRB030801 (large error box)
  7. GRB021206 optical counterpart upper limit
  8. XRF030723 Radio Observations
  9. XRF 030723: confirmation of fading optical counterpart
  10. XRF030723(=H2777): Chandra Observations
  11. GRB030723: Upper limits from historical observations
  12. GRB030725, possible optical transient
  13. XRF030723: Palomar observations and proposed counterpart
  14. XRF030723, BVRcIc field photometry correction
  15. XRF030723, ROTSE-III Early Observations
  16. XRF030723, BVRcIc field photometry
  17. XRF 030723, optical observations
  18. XRF030723, optical observations
  19. XRF030723 (=H2777): An X-ray Flash Localized by the HETE WXM and
  20. SGR 1806-20, submm observations
  21. RXTE PCA Observations of SGR1806-20 Region
  22. GRB030329: Subaru Optical Spectroscopy
  23. GRB030329, optical observation in May
  24. IPN triangulation of GRB030626 (single large error box)
  25. IPN triangulation of GRB030626 (two large error boxes)
  26. HETE detection of burst from SGR1806-20
  27. GRB030528(=H2724): X-ray Afterglow Identified in Second Epoch
  28. IPN triangulation of GRB030606 (two alternate error boxes)
  29. GRB 030528: Infrared Observations and the Proposed IR Counterpart
  30. GRB 030528: tentative NIR counterpart
  31. GRB030528(=H2724): Observations with the Chandra X-ray Observatory
  32. GRB030528, BVRI field photometry
  33. GRB030329, SPM optical observations
  34. GRB030528(=H2724): Revised SXC Localization
  35. GRB 030528 Bisei optical observation
  36. GRB030528 (H2724): A long GRB localized by HETE
  37. GRB 030528 (=H2724) Kyoto optical observation
  38. GRB030329, Optical observations
  39. GRB 030329 Optical Observations
  40. GRB 021004: HST observations
  41. GRB030324: Further Observations of the Candidate Optical Afterglow
  42. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  43. HETE GRB030329, correction to Rc Observations in Loiano
  44. GRB 030329: Optical limit (contemporaneous imaging)
  45. IPN triangulation of GRB030509 (small errror box)
  46. IPN triangulation of GRB030509 - correction
  47. IPN triangulation of GRB030509 (single error box)
  48. GRB030429, refiend optical brightness
  49. GRB030418, BVRcIc field photometry
  50. GRB030429, BVRcIc field photometry
  51. GRB030329: RTT150 optical observations and upper limit for a host
  52. GRB 030429: redshift from VLT spectroscopy
  53. GRB030501: TAROT candidate afterglow present in archival images
  54. IPN triangulation of GRB030501B (annulus)
  55. GRB 030429: confirmation of afterglow candidate
  56. GRB 030329 Oprical observations in Rozhen observatory
  57. GRB030329, SPM optical observations
  58. GRB 030329, the review of the sky area in plate archive (1950-1998)
  59. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  60. GRB030329: optical polarization
  61. MASTER:optical observations GRB030418
  62. MASTER:optical observations probable GRB030414
  63. GRB030418: Upper limits from recent and historical observations.
  64. GRB030418: Kiso near infrared observations
  65. GRB030329: Optical Observations
  66. GRB 030329: SARA Optical Observations
  67. OT GRB 030329: early spectrum
  68. IPN triangulation of GRB030414 (small error box)
  69. GRB 030329 and SN 2003dh
  70. GRB030329, optical position
  71. GRB 030329 VLBA Observations
  72. GRB 030329, light curve flattens
  73. Kiso observation of the GRB030329 at April 6
  74. GRB 030329, color evolution
  75. GRB030328, UBVRcIc field photometry
  76. GRB 030329 Optical observations
  77. GRB 030329, color evolution
  78. GRB030329: Kiso B and R band observations
  79. SDSS 0.5m PT observations of GRB030329 (correction)
  80. SDSS 0.5m PT observations of GRB030329
  81. GRB030329: final R-band light curve by MASTER
  82. GRB030329, new UBVRcIc field photometry
  83. GRB 030329 , SPM optical observations
  84. GRB030329: Optical observations at Teramo
  85. GRB 030329: Radio observations at GMRT
  86. GRB 030329: Additional Mt. Laguna Optical Observations
  87. GRB 030329: Observations with ANDICAM
  88. GRB 030329: optical observations
  89. GRB 030324: Optical and NIR Observations
  90. GRB030329: R band light curve by MASTER
  91. GRB030329 - Light curve flattening
  92. GRB 030324, optical search
  93. GRB 030329, optical observations
  94. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  95. GRB030329, BVRcIc field photometry
  96. GRB030329, SPM optical observations
  97. GRB 030329, optical photometry
  98. GRB030329 optical observations
  99. GRB 030329: Optical pre-Imaging
  100. GRB 030329: visual observations

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