ASTROSAT CZTI

Data Quality Report

Orbit 20161108_A02_090T01_9000000778_level2

Creation date: 2021-08-25T17:34:42.698700
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A02_090T01_9000000778cztM0_level2_bc.evt modeM0/AS1A02_090T01_9000000778cztM0_level2_quad_clean.evt
Size (bytes)3,651,845,7601,326,260,160
Size3.4 GB 1.2 GB
Events in quadrant A31,814,4398,410,043
Events in quadrant B29,424,6898,568,533
Events in quadrant C19,881,1908,543,961
Events in quadrant D22,966,8718,099,490

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02420350
B02353780
C01977750
D02089040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019660
B019560
C019560
D019700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01710
B01700
C01710
D01720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9531726012.728789%
B9547639434.129834%
C956257750.810458%
D9561317131.791597%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 140493 96610 43 43 0.03% 0.04%
B 140493 96738 275 275 0.20% 0.28%
C 140493 96837 19 19 0.01% 0.02%
D 140493 96837 139 139 0.10% 0.14%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 13 34 11283538 10011.05 4949 4841 1126.6
A 8 15 673064 593.12 4949 4841 1126.6
A 15 236 219185 190.25 4949 4841 1126.6
B 3 64 6940545 7137.12 5012 4903 971.8
B 15 204 1347440 1381.54 5012 4903 971.8
B 0 214 865129 885.21 5012 4903 971.8
C 1 16 268261 240.66 4933 4904 1094.3
C 9 54 140180 123.62 4933 4904 1094.3
C 14 67 49482 40.74 4933 4904 1094.3
D 2 16 1330320 1112.13 4905 4715 1192.0
D 12 79 820220 684.17 4905 4715 1192.0
D 8 195 598195 497.9 4905 4715 1192.0

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter