ASTROSAT CZTI

Data Quality Report

Orbit 51999

Creation date: 2025-05-10T11:47:04.640504
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/AS1C09_011T06_9000006468_51999cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51999cztM0_level2_quad_clean.evt
Size (bytes)696,792,96075,856,320
Size664.5 MB 72.3 MB
Events in quadrant A9,388,664357,532
Events in quadrant B4,322,983572,575
Events in quadrant C4,614,314507,678
Events in quadrant D7,003,941440,072

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0319971
B0169611
C0177752
D0249481

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5984249841.744652%
B59854116.867168%
C59844747.921123%
D598498616.477273%

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 6924 5984 2229 2229 32.19% 37.25%
B 6925 5985 275 275 3.97% 4.59%
C 6924 5984 400 400 5.78% 6.68%
D 6924 5984 922 922 13.32% 15.41%

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 7 64 3679143 28265.54 516 502 130.1
A 12 2 1277342 9810.84 516 502 130.1
A 4 95 836244 6421.58 516 502 130.1
B 4 206 769834 6041.22 601 582 127.3
B 10 128 181682 1422.25 601 582 127.3
B 4 171 151265 1183.37 601 582 127.3
C 15 224 1262509 7687.28 593 587 164.2
C 0 176 263145 1599.43 593 587 164.2
C 9 38 157648 956.77 593 587 164.2
D 6 42 904860 5549.29 567 539 163.0
D 12 17 868234 5324.54 567 539 163.0
D 6 43 655435 4018.71 567 539 163.0

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