ASTROSAT CZTI

Data Quality Report

Orbit 52875

Creation date: 2025-07-16T11:54:25.492501
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_011T08_9000006482_52875cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52875cztM0_level2_quad_clean.evt
Size (bytes)1,027,146,24068,074,560
Size979.6 MB 64.9 MB
Events in quadrant A15,566,69342,976
Events in quadrant B9,948,929463,509
Events in quadrant C7,085,353516,932
Events in quadrant D4,913,846580,002

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0505281
B0340461
C0256231
D0190521

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6556620694.661379%
B6556261139.826113%
C6555130319.877956%
D65553134.774981%

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 7700 6555 5837 5837 75.81% 89.05%
B 7701 6557 2127 2127 27.62% 32.44%
C 7699 6554 1095 1095 14.22% 16.71%
D 7700 6556 243 243 3.16% 3.71%

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 9 191 14018465 178204.74 306 297 78.7
A 0 8 76512 968.88 306 297 78.7
A 15 174 70669 894.6 306 297 78.7
B 8 3 6836348 54408.62 599 581 125.6
B 5 185 171175 1357.83 599 581 125.6
B 4 81 120723 956.26 599 581 125.6
C 2 12 1961122 11454.23 615 608 171.2
C 7 80 854138 4986.72 615 608 171.2
C 15 224 703065 4104.08 615 608 171.2
D 8 176 528754 2711.08 682 651 194.8
D 2 249 394228 2020.48 682 651 194.8
D 2 153 207169 1060.19 682 651 194.8

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