ASTROSAT CZTI

Data Quality Report

Orbit 55427

Creation date: 2025-12-26T16:12:48.070211
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_55427cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55427cztM0_level2_quad_clean.evt
Size (bytes)515,940,48094,426,560
Size492.0 MB 90.1 MB
Events in quadrant A3,272,978642,433
Events in quadrant B3,045,614691,262
Events in quadrant C3,271,607611,062
Events in quadrant D8,968,199430,540

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148232
B0144292
C0152002
D0314512

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69391492.147283%
B69401522.190202%
C69401632.348703%
D6940200728.919308%

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 8554 6941 24 24 0.28% 0.35%
B 8555 6942 4 4 0.05% 0.06%
C 8555 6942 57 57 0.67% 0.82%
D 8555 6942 1609 1609 18.81% 23.18%

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 4 159 119620 652.33 742 723 182.3
A 3 78 118214 644.61 742 723 182.3
A 0 8 82989 451.35 742 723 182.3
B 10 247 38399 240.92 733 705 156.5
B 0 199 34806 217.96 733 705 156.5
B 12 111 19612 120.85 733 705 156.5
C 13 3 322713 1645.67 714 706 195.7
C 12 252 71379 361.19 714 706 195.7
C 10 19 48338 243.43 714 706 195.7
D 11 129 6060438 34562.12 623 596 175.3
D 2 249 154760 879.27 623 596 175.3
D 10 181 50953 287.21 623 596 175.3

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