ASTROSAT CZTI

Data Quality Report

Orbit 20161021_G06_002T01_9000000742_level2

Creation date: 2025-11-07T02:37:17.163260
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/AS1G06_002T01_9000000742cztM0_level2.fits modeM0/AS1G06_002T01_9000000742cztM0_level2_quad_clean.evt
Size (bytes)740,897,280697,809,600
Size706.6 MB 665.5 MB
Events in quadrant A4,440,5504,060,137
Events in quadrant B4,336,7444,080,341
Events in quadrant C4,413,0023,929,852
Events in quadrant D3,808,2583,625,807

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01633960
B01668360
C01626880
D01661230

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01160
C01170
D01170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016080
B016200
C016240
D016180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A792879471.194395%
B7924910871.371626%
C793266740.849658%
D792488091.020846%

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 93919 81201 0 0 0.00% 0.00%
B 93919 81203 0 0 0.00% 0.00%
C 93919 81258 0 0 0.00% 0.00%
D 93919 81242 0 0 0.00% 0.00%

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 0 29 4188 10.54 1155 1075 295.4
A 7 110 3815 9.28 1155 1075 295.4
A 0 30 3343 7.68 1155 1075 295.4
B 2 9 3745 11.76 1141 1084 226.3
B 12 226 3042 8.65 1141 1084 226.3
B 3 17 2902 8.03 1141 1084 226.3
C 1 80 3207 6.87 1166 1079 309.6
C 1 81 3060 6.4 1166 1079 309.6
C 9 188 3043 6.34 1166 1079 309.6
D 3 14 2926 6.77 1085 986 286.7
D 11 82 2871 6.57 1085 986 286.7
D 6 231 2829 6.43 1085 986 286.7

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