ASTROSAT CZTI

Data Quality Report

Orbit 20160827_G05_157T01_9000000626_level2

Creation date: 2025-11-05T00:40:08.865527
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/AS1G05_157T01_9000000626cztM0_level2.fits modeM0/AS1G05_157T01_9000000626cztM0_level2_quad_clean.evt
Size (bytes)684,037,440730,247,040
Size652.3 MB 696.4 MB
Events in quadrant A4,014,5444,281,195
Events in quadrant B3,983,4564,454,551
Events in quadrant C4,093,8644,384,038
Events in quadrant D3,438,5443,814,324

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015440
B015440
C015440
D015420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01897270
B01660050
C01546590
D02101750

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01150
B01150
C01150
D01150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7556948426.407389%
B7556514131.869913%
C755655200.688149%
D7556244715.916995%

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 87163 74769 0 0 0.00% 0.00%
B 87163 75552 0 0 0.00% 0.00%
C 87163 75562 0 0 0.00% 0.00%
D 87163 75348 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 14 188 3997 11.38 1041 971 265.8
A 0 29 3852 10.84 1041 971 265.8
A 14 204 3529 9.62 1041 971 265.8
B 2 9 3431 11.52 1053 1004 210.7
B 12 226 2927 9.13 1053 1004 210.7
B 14 254 2750 8.29 1053 1004 210.7
C 1 81 3067 7.28 1080 1001 283.9
C 1 80 3063 7.26 1080 1001 283.9
C 12 241 2919 6.76 1080 1001 283.9
D 11 82 2706 6.85 980 889 265.3
D 3 14 2590 6.41 980 889 265.3
D 4 160 2528 6.18 980 889 265.3

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