ASTROSAT CZTI

Data Quality Report

Orbit 55522

Creation date: 2026-01-02T11:47:14.797323
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_099T01_9000006536_55522cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55522cztM0_level2_quad_clean.evt
Size (bytes)573,387,840100,800,000
Size546.8 MB 96.1 MB
Events in quadrant A3,353,674701,797
Events in quadrant B4,552,009716,987
Events in quadrant C3,613,809659,822
Events in quadrant D9,129,936458,408

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156472
B0188962
C0165342
D0323232

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7400831.121622%
B73994706.352210%
C73991321.784025%
D7399216129.206650%

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 7740 7401 12 12 0.16% 0.16%
B 7739 7400 279 279 3.61% 3.77%
C 7739 7400 63 63 0.81% 0.85%
D 7739 7400 1604 1604 20.73% 21.68%

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 4 205 111457 565.48 799 780 195.7
A 3 14 23483 116.0 799 780 195.7
A 13 254 18331 89.67 799 780 195.7
B 4 156 973485 5908.87 773 746 164.6
B 10 247 110053 663.98 773 746 164.6
B 5 172 106015 639.45 773 746 164.6
C 13 3 326112 1553.39 778 770 209.4
C 10 19 68762 324.64 778 770 209.4
C 14 254 43064 201.94 778 770 209.4
D 11 129 4067284 21459.97 669 638 189.5
D 2 249 890736 4697.11 669 638 189.5
D 8 160 818020 4313.38 669 638 189.5

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