ASTROSAT CZTI

Data Quality Report

Orbit 58639

Creation date: 2026-07-30T18:12:17.597268
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_004T06_9000006594_58639cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58639cztM0_level2_quad_clean.evt
Size (bytes)607,489,92095,094,720
Size579.3 MB 90.7 MB
Events in quadrant A4,654,072650,648
Events in quadrant B3,652,443706,542
Events in quadrant C7,551,968493,751
Events in quadrant D6,101,519554,499

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0183601
B0153351
C0270221
D0228143

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67992032.985733%
B67991181.735549%
C6800166524.485294%
D679968810.119135%

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 7734 6800 95 95 1.23% 1.40%
B 7734 6799 36 36 0.47% 0.53%
C 7735 6801 1468 1468 18.98% 21.59%
D 7735 6801 593 593 7.67% 8.72%

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 12 114 1373893 7333.97 757 737 187.2
A 10 17 240143 1278.66 757 737 187.2
A 3 14 73687 389.62 757 737 187.2
B 8 128 274172 1705.36 746 718 160.3
B 8 234 100864 624.55 746 718 160.3
B 4 171 94478 584.72 746 718 160.3
C 13 3 4101972 22722.14 648 642 180.5
C 15 217 503298 2784.81 648 642 180.5
C 12 252 194180 1072.24 648 642 180.5
D 2 249 1166140 5817.35 710 676 200.3
D 11 129 718685 3583.9 710 676 200.3
D 7 222 434353 2164.67 710 676 200.3

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