ASTROSAT CZTI

Data Quality Report

Orbit 20180315_A04_196T04_9000001982_level2

Creation date: 2025-11-20T03:29:58.813209
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/AS1A04_196T04_9000001982cztM0_level2.fits modeM0/AS1A04_196T04_9000001982cztM0_level2_quad_clean.evt
Size (bytes)56,433,60050,028,480
Size53.8 MB 47.7 MB
Events in quadrant A346,912286,064
Events in quadrant B337,312293,086
Events in quadrant C345,140289,355
Events in quadrant D298,598264,317

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121380
B0118400
C0115230
D0120450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5445250.459137%
B5445270.495868%
C5445140.257117%
D5445350.642792%

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 6860 5445 0 0 0.00% 0.00%
B 6860 5445 0 0 0.00% 0.00%
C 6860 5445 0 0 0.00% 0.00%
D 6860 5445 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 14 188 337 10.31 90 85 24.4
A 0 29 319 9.58 90 85 24.4
A 14 204 295 8.59 90 85 24.4
B 2 9 274 9.46 89 85 20.0
B 3 17 236 7.56 89 85 20.0
B 12 226 217 6.61 89 85 20.0
C 12 242 243 6.26 91 86 25.1
C 3 126 237 6.02 91 86 25.1
C 12 241 234 5.9 91 86 25.1
D 4 246 234 6.41 85 78 24.3
D 6 8 222 5.92 85 78 24.3
D 10 189 220 5.83 85 78 24.3

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