ASTROSAT CZTI

Data Quality Report

Orbit 55150

Creation date: 2025-12-08T01:07:43.875504
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_022T16_9000006532_55150cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55150cztM0_level2_quad_clean.evt
Size (bytes)1,166,523,840143,884,800
Size1.1 GB 137.2 MB
Events in quadrant A11,006,900948,686
Events in quadrant B10,239,441920,426
Events in quadrant C6,314,381995,835
Events in quadrant D14,730,465695,349

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02320
B02320
C02320
D02320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0407312
B0391244
C0268132
D0518812

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11507149913.026853%
B11506232220.180775%
C115071931.677240%
D11507329728.652125%

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 12802 11507 1326 1326 10.36% 11.52%
B 12801 11506 1840 1840 14.37% 15.99%
C 12802 11507 121 121 0.95% 1.05%
D 12802 11507 3213 3213 25.10% 27.92%

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 78 6276636 21912.21 1153 1126 286.4
A 0 8 142199 492.58 1153 1126 286.4
A 4 3 35442 119.82 1153 1126 286.4
B 2 249 5137735 21762.79 1093 1051 236.0
B 5 185 348723 1473.0 1093 1051 236.0
B 5 172 227828 960.79 1093 1051 236.0
C 1 16 473989 1469.41 1177 1164 321.8
C 10 22 317128 981.93 1177 1164 321.8
C 13 3 304747 943.45 1177 1164 321.8
D 11 129 9759155 34079.15 1012 966 286.3
D 3 12 379312 1321.32 1012 966 286.3
D 11 176 153251 531.83 1012 966 286.3

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