ASTROSAT CZTI

Data Quality Report

Orbit 54426

Creation date: 2025-10-20T06:09:40.708735
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_126T19_9000006518_54426cztM0_level2.fits modeM0/AS1A14_126T19_9000006518_54426cztM0_level2_quad_clean.evt
Size (bytes)510,301,44094,397,760
Size486.7 MB 90.0 MB
Events in quadrant A2,993,937655,082
Events in quadrant B3,418,074692,696
Events in quadrant C4,845,172568,055
Events in quadrant D7,094,976461,074

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0141342
B0151832
C0196612
D0261552

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6907510.738381%
B69081291.867400%
C690870210.162131%
D6908155522.510133%

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 8682 6909 1 1 0.01% 0.01%
B 8683 6910 25 25 0.29% 0.36%
C 8683 6910 635 635 7.31% 9.19%
D 8683 6910 1406 1406 16.19% 20.35%

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 11 3 28756 153.19 739 719 183.0
A 4 3 28180 150.04 739 719 183.0
A 0 8 20951 110.55 739 719 183.0
B 5 185 182296 1150.14 730 702 157.9
B 0 213 113426 713.95 730 702 157.9
B 10 247 91956 577.97 730 702 157.9
C 1 241 1669357 8778.91 690 683 190.1
C 1 16 100842 526.94 690 683 190.1
C 4 5 98538 514.82 690 683 190.1
D 7 70 2963389 16367.52 634 605 181.0
D 8 176 741200 4091.32 634 605 181.0
D 3 12 291646 1607.82 634 605 181.0

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