ASTROSAT CZTI

Data Quality Report

Orbit 57745

Creation date: 2026-05-31T14:13:03.335364
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_083T16_9000006580_57745cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57745cztM0_level2_quad_clean.evt
Size (bytes)536,368,320102,182,400
Size511.5 MB 97.4 MB
Events in quadrant A4,140,146681,112
Events in quadrant B3,477,355718,699
Events in quadrant C7,884,892593,997
Events in quadrant D3,799,401604,336

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0171462
B0153192
C0283502
D0164472

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71201882.640449%
B71202613.665730%
C7120105214.775281%
D71202613.665730%

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 7705 7121 17 17 0.22% 0.24%
B 7705 7121 13 13 0.17% 0.18%
C 7705 7121 856 856 11.11% 12.02%
D 7705 7121 101 101 1.31% 1.42%

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 7 160 961242 5110.42 768 746 187.9
A 3 61 78822 415.41 768 746 187.9
A 3 128 70099 369.0 768 746 187.9
B 0 63 168016 1040.52 760 730 160.8
B 10 247 83622 515.59 760 730 160.8
B 9 251 52186 320.06 760 730 160.8
C 9 38 2949623 15096.79 726 718 195.3
C 15 224 1779935 9108.62 726 718 195.3
C 14 254 75612 383.42 726 718 195.3
D 3 12 276639 1311.86 747 713 210.3
D 8 240 218537 1035.62 747 713 210.3
D 2 249 159845 756.57 747 713 210.3

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