ASTROSAT CZTI

Data Quality Report

Orbit 54250

Creation date: 2025-10-08T11:15:06.821290
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_004T08_9000006514_54250cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54250cztM0_level2_quad_clean.evt
Size (bytes)751,694,40070,758,720
Size716.9 MB 67.5 MB
Events in quadrant A6,796,163454,352
Events in quadrant B3,275,848627,891
Events in quadrant C4,870,835504,226
Events in quadrant D12,387,923112,187

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0246371
B0141291
C0193311
D0411811

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6355159325.066876%
B63561081.699182%
C635575411.864673%
D6355518181.526357%

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 7220 6356 1266 1266 17.53% 19.92%
B 7221 6357 49 49 0.68% 0.77%
C 7220 6356 644 644 8.92% 10.13%
D 7219 6354 3414 3414 47.29% 53.73%

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 7 29 4272420 31075.66 563 549 137.5
A 15 174 92464 668.63 563 549 137.5
A 13 248 84897 613.59 563 549 137.5
B 7 0 207430 1453.54 656 632 142.3
B 8 234 204297 1431.52 656 632 142.3
B 0 213 108707 759.64 656 632 142.3
C 1 241 1587746 9514.35 607 602 166.8
C 1 29 452609 2709.62 607 602 166.8
C 12 2 249317 1490.96 607 602 166.8
D 8 176 10790301 150182.4 245 233 71.8
D 12 3 388420 5403.01 245 233 71.8
D 10 181 51434 712.65 245 233 71.8

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