ASTROSAT CZTI

Data Quality Report

Orbit 58902

Creation date: 2026-08-17T09:11:38.479889
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_004T07_9000006598_58902cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58902cztM0_level2_quad_clean.evt
Size (bytes)617,647,680104,886,720
Size589.0 MB 100.0 MB
Events in quadrant A4,577,180694,640
Events in quadrant B4,616,140741,720
Events in quadrant C4,233,162671,503
Events in quadrant D8,875,298563,281

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186512
B0186682
C0176942
D0314872

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72492162.979721%
B72503174.372414%
C72502162.979310%
D7250107714.855172%

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 9134 7251 108 108 1.18% 1.49%
B 9135 7252 132 132 1.44% 1.82%
C 9135 7252 174 174 1.90% 2.40%
D 9135 7252 1029 1029 11.26% 14.19%

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 14 238 926343 4680.83 800 779 197.7
A 15 233 288475 1454.96 800 779 197.7
A 3 245 157170 790.91 800 779 197.7
B 5 172 665772 3898.62 792 761 170.6
B 4 171 349096 2042.11 792 761 170.6
B 5 248 191880 1120.43 792 761 170.6
C 12 252 484920 2268.81 780 775 213.4
C 12 249 277600 1297.26 780 775 213.4
C 4 5 275844 1289.04 780 775 213.4
D 12 110 5091453 24136.73 742 709 210.9
D 11 129 572230 2709.75 742 709 210.9
D 5 32 54740 256.17 742 709 210.9

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

TCT plots

Parameter TCT0 TCT_healed
Tct