ASTROSAT CZTI

Data Quality Report

Orbit 54845

Creation date: 2025-11-17T12:20:32.975159
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_039T06_9000006526_54845cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54845cztM0_level2_quad_clean.evt
Size (bytes)802,491,840192,588,480
Size765.3 MB 183.7 MB
Events in quadrant A6,427,3461,261,601
Events in quadrant B6,343,2271,347,353
Events in quadrant C8,492,3401,139,410
Events in quadrant D7,376,4871,133,615

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03008764
B02945456
C03576475
D032421107

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02820
B02820
C02820
D02820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A137412591.884870%
B137432011.462563%
C137386714.884263%
D137382581.878003%

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 15333 13749 120 120 0.78% 0.87%
B 15340 13751 23 23 0.15% 0.17%
C 15331 13746 651 651 4.25% 4.74%
D 15338 13750 181 181 1.18% 1.32%

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 13 248 514064 1421.21 1443 1408 360.7
A 8 206 139694 383.36 1443 1408 360.7
A 3 14 63093 171.01 1443 1408 360.7
B 5 185 169633 541.57 1426 1369 310.7
B 2 249 161432 515.18 1426 1369 310.7
B 7 0 105069 333.77 1426 1369 310.7
C 4 5 1575780 4159.15 1382 1371 378.5
C 12 252 512296 1349.72 1382 1371 378.5
C 12 250 211650 555.5 1382 1371 378.5
D 3 12 439602 1104.81 1392 1331 396.7
D 8 160 206079 516.14 1392 1331 396.7
D 14 52 180582 451.86 1392 1331 396.7

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