ASTROSAT CZTI

Data Quality Report

Orbit 53877

Creation date: 2025-09-14T11:26:36.503618
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/AS1A14_057T04_9000006508_53877cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53877cztM0_level2_quad_clean.evt
Size (bytes)794,401,92087,822,720
Size757.6 MB 83.8 MB
Events in quadrant A4,975,578645,264
Events in quadrant B3,846,218716,135
Events in quadrant C6,538,938576,199
Events in quadrant D13,531,771259,037

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193102
B0159722
C0240132
D0446994

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66323915.895657%
B66321702.563329%
C663288613.359469%
D6631414762.539587%

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 7807 6633 258 258 3.30% 3.89%
B 7807 6633 47 47 0.60% 0.71%
C 7807 6632 670 670 8.58% 10.10%
D 7805 6630 3650 3650 46.76% 55.05%

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 12 115 1023931 5709.52 724 708 179.2
A 15 174 752909 4197.24 724 708 179.2
A 3 62 134373 745.84 724 708 179.2
B 7 0 244275 1551.72 739 714 157.0
B 5 185 186179 1181.59 739 714 157.0
B 0 213 121205 767.64 739 714 157.0
C 15 224 1968691 10453.68 682 680 188.3
C 15 158 773765 4106.47 682 680 188.3
C 13 3 306955 1626.87 682 680 188.3
D 8 176 9984584 72369.39 475 452 138.0
D 2 172 1102060 7984.94 475 452 138.0
D 13 153 168272 1216.43 475 452 138.0

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