ASTROSAT CZTI

Data Quality Report

Orbit 58652

Creation date: 2026-07-31T16:06:59.125971
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_58652cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58652cztM0_level2_quad_clean.evt
Size (bytes)2,220,307,200319,472,640
Size2.1 GB 304.7 MB
Events in quadrant A22,404,8602,069,261
Events in quadrant B11,908,2352,403,267
Events in quadrant C14,584,6302,147,472
Events in quadrant D31,425,3291,389,374

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0835873
B0526023
C0603313
D01100363

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04920
B04920
C04920
D04920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A24157293312.141408%
B241586792.810663%
C2415810804.470569%
D24158727530.114248%

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 25602 24157 2426 2426 9.48% 10.04%
B 25603 24159 164 164 0.64% 0.68%
C 25603 24159 714 714 2.79% 2.96%
D 25603 24159 6014 6014 23.49% 24.89%

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 8630691 13488.39 2601 2534 639.7
A 10 17 3134451 4896.12 2601 2534 639.7
A 10 251 212759 328.64 2601 2534 639.7
B 5 185 551055 973.45 2623 2514 563.5
B 0 186 342034 602.52 2623 2514 563.5
B 8 234 176920 309.5 2623 2514 563.5
C 15 164 1203613 1723.69 2569 2549 696.8
C 12 252 1066105 1526.35 2569 2549 696.8
C 13 3 1023108 1464.64 2569 2549 696.8
D 8 240 14687654 23552.32 2202 2103 623.5
D 11 129 4371786 7007.99 2202 2103 623.5
D 2 249 2460435 3942.61 2202 2103 623.5

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