ASTROSAT CZTI

Data Quality Report

Orbit 57975

Creation date: 2026-06-16T01:15:19.482833
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_031T01_9000006584_57975cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57975cztM0_level2_quad_clean.evt
Size (bytes)526,273,92089,959,680
Size501.9 MB 85.8 MB
Events in quadrant A2,843,447616,899
Events in quadrant B3,672,955650,311
Events in quadrant C5,306,157521,682
Events in quadrant D7,181,520505,547

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0128331
B0151931
C0200991
D0256373

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6147540.878477%
B61482474.017567%
C614881113.191282%
D614768211.094843%

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 7357 6148 12 12 0.16% 0.20%
B 7358 6149 156 156 2.12% 2.54%
C 7358 6150 614 614 8.34% 9.98%
D 7357 6148 803 803 10.91% 13.06%

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 13 248 63015 363.89 690 675 171.3
A 4 236 28075 159.94 690 675 171.3
A 0 8 23945 135.83 690 675 171.3
B 10 128 642202 4399.17 675 651 145.8
B 6 51 118144 805.66 675 651 145.8
B 0 153 38382 258.72 675 651 145.8
C 15 224 1998718 11808.46 612 607 169.2
C 6 223 756166 4465.21 612 607 169.2
C 12 252 65572 383.93 612 607 169.2
D 12 110 4049860 22245.3 638 613 182.0
D 12 251 199126 1090.57 638 613 182.0
D 8 240 134788 737.12 638 613 182.0

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