ASTROSAT CZTI

Data Quality Report

Orbit 57184

Creation date: 2026-04-23T20:49:11.519280
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_070T08_9000006568_57184cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57184cztM0_level2_quad_clean.evt
Size (bytes)1,318,639,680248,552,640
Size1.2 GB 237.0 MB
Events in quadrant A7,781,2631,698,938
Events in quadrant B9,507,0331,795,338
Events in quadrant C15,869,0891,453,426
Events in quadrant D14,235,6961,315,056

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03720
B03720
C03720
D03720

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0373783
B0413114
C0600373
D0550163

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A183203161.724891%
B183206543.569869%
C18320231512.636463%
D18320193310.551310%

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 19555 18322 5 5 0.03% 0.03%
B 19555 18321 182 182 0.93% 0.99%
C 19555 18322 1841 1841 9.41% 10.05%
D 19555 18324 1646 1646 8.42% 8.98%

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 3 14 67274 135.17 1962 1909 483.6
A 10 251 58186 116.38 1962 1909 483.6
A 13 254 29874 57.83 1962 1909 483.6
B 10 16 489736 1207.46 1907 1832 404.1
B 0 213 356781 878.42 1907 1832 404.1
B 2 249 339578 835.85 1907 1832 404.1
C 15 224 8316986 17152.38 1785 1761 484.8
C 9 38 224141 458.72 1785 1761 484.8
C 2 12 77654 156.55 1785 1761 484.8
D 12 33 4800773 9317.53 1822 1740 515.1
D 2 249 1232956 2390.46 1822 1740 515.1
D 8 240 355630 687.09 1822 1740 515.1

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