ASTROSAT CZTI

Data Quality Report

Orbit 59254

Creation date: 2026-09-10T02:08:33.935952
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/AS1T05_271T01_9000006604_59254cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59254cztM0_level2_quad_clean.evt
Size (bytes)493,672,320100,756,800
Size470.8 MB 96.1 MB
Events in quadrant A3,569,153676,340
Events in quadrant B3,767,978738,509
Events in quadrant C3,317,284671,629
Events in quadrant D7,100,067498,917

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153232
B0158332
C0144602
D0256802

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66782754.117999%
B66792663.982632%
C66791191.781704%
D6679149222.338673%

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 9104 6681 146 146 1.60% 2.19%
B 9105 6682 102 102 1.12% 1.53%
C 9105 6682 17 17 0.19% 0.25%
D 9105 6682 1200 1200 13.18% 17.96%

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 15 233 292487 1573.4 766 745 185.4
A 0 24 137497 737.52 766 745 185.4
A 10 251 115338 618.02 766 745 185.4
B 4 236 475133 2918.44 765 737 162.6
B 10 247 126270 772.27 765 737 162.6
B 4 201 77591 472.8 765 737 162.6
C 12 252 147196 696.64 770 762 210.2
C 10 22 48291 226.11 770 762 210.2
C 14 254 35082 163.27 770 762 210.2
D 12 110 3046521 15266.67 700 670 199.5
D 2 249 679151 3400.74 700 670 199.5
D 3 12 352365 1762.8 700 670 199.5

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

TCT plots

Parameter TCT0 TCT_healed
Tct