ASTROSAT CZTI

Data Quality Report

Orbit 55610

Creation date: 2026-01-08T11:58:39.604991
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_021T06_9000006538_55610cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55610cztM0_level2_quad_clean.evt
Size (bytes)454,063,680106,369,920
Size433.0 MB 101.4 MB
Events in quadrant A3,830,368695,053
Events in quadrant B3,776,459733,475
Events in quadrant C4,109,785648,719
Events in quadrant D4,506,324619,932

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0167560
B0170800
C0178430
D0186580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7526590.783949%
B75261892.511294%
C75261291.714058%
D7526801.062982%

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 7526 7526 47 47 0.62% 0.62%
B 7526 7526 139 139 1.85% 1.85%
C 7526 7526 107 107 1.42% 1.42%
D 7526 7526 66 66 0.88% 0.88%

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 12 115 241951 1257.21 778 758 191.8
A 8 249 197772 1026.93 778 758 191.8
A 4 159 150678 781.45 778 758 191.8
B 5 185 454561 2790.83 762 734 162.6
B 0 173 169520 1037.96 762 734 162.6
B 10 247 68528 416.9 762 734 162.6
C 9 38 443831 2172.25 752 746 204.0
C 13 3 278365 1361.04 752 746 204.0
C 12 252 93734 455.88 752 746 204.0
D 15 125 449392 2107.6 755 721 212.9
D 2 16 274457 1285.85 755 721 212.9
D 2 31 200449 938.21 755 721 212.9

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