ASTROSAT CZTI

Data Quality Report

Orbit 20220212_A05_118T04_9000004926_level2

Creation date: 2026-01-01T01:20:06.160930
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/AS1A05_118T04_9000004926cztM0_level2.fits modeM0/AS1A05_118T04_9000004926cztM0_level2_quad_clean.evt
Size (bytes)128,496,960101,381,760
Size122.5 MB 96.7 MB
Events in quadrant A804,416567,767
Events in quadrant B742,822564,811
Events in quadrant C778,262541,092
Events in quadrant D663,336493,077

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02660
B02660
C02660
D02660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0273640
B0333520
C0279660
D0400960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13062260.199051%
B130627385.649977%
C13062500.382790%
D130625584.271934%

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 39680 13063 0 0 0.00% 0.00%
B 39680 13058 0 0 0.00% 0.00%
C 39680 13063 0 0 0.00% 0.00%
D 39680 13062 0 0 0.00% 0.00%

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 0 29 670 8.87 210 198 53.2
A 9 19 634 8.19 210 198 53.2
A 7 110 623 7.99 210 198 53.2
B 2 9 688 12.31 196 188 40.6
B 3 80 533 8.49 196 188 40.6
B 2 8 531 8.44 196 188 40.6
C 1 81 629 8.11 205 194 53.7
C 1 80 613 7.81 205 194 53.7
C 3 202 592 7.42 205 194 53.7
D 10 189 512 6.59 190 174 51.3
D 4 160 491 6.18 190 174 51.3
D 6 38 484 6.05 190 174 51.3

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