ASTROSAT CZTI

Data Quality Report

Orbit 57417

Creation date: 2026-05-09T14:06:51.622340
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_102T01_9000006572_57417cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57417cztM0_level2_quad_clean.evt
Size (bytes)1,952,441,280358,246,080
Size1.8 GB 341.7 MB
Events in quadrant A18,772,5432,376,313
Events in quadrant B12,023,2892,554,949
Events in quadrant C24,726,5832,022,843
Events in quadrant D14,748,4752,109,620

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0750525
B0549765
C0916235
D0623715

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05240
B05240
C05240
D05240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A259099183.543170%
B259104921.898881%
C25910384914.855268%
D259108683.350058%

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 27777 26181 500 500 1.80% 1.91%
B 27778 26178 50 50 0.18% 0.19%
C 27778 26182 2964 2964 10.67% 11.32%
D 27778 26183 566 566 2.04% 2.16%

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 0 12 7801749 11432.33 2789 2719 682.2
A 3 14 56626 79.02 2789 2719 682.2
A 13 254 37530 51.03 2789 2719 682.2
B 5 185 248803 419.16 2767 2660 587.2
B 7 252 212046 356.57 2767 2660 587.2
B 10 247 118070 196.53 2767 2660 587.2
C 15 224 12831384 18635.96 2560 2538 688.4
C 14 254 865312 1253.32 2560 2538 688.4
C 6 223 503844 728.23 2560 2538 688.4
D 8 240 967843 1278.51 2687 2567 755.0
D 7 96 806895 1065.34 2687 2567 755.0
D 3 12 702445 926.99 2687 2567 755.0

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