ASTROSAT CZTI

Data Quality Report

Orbit 20171122_A04_026T01_9000001712_level2

Creation date: 2025-11-18T14:28:51.829123
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/AS1A04_026T01_9000001712cztM0_level2.fits modeM0/AS1A04_026T01_9000001712cztM0_level2_quad_clean.evt
Size (bytes)194,109,120166,821,120
Size185.1 MB 159.1 MB
Events in quadrant A1,147,834936,954
Events in quadrant B1,171,4521,041,809
Events in quadrant C1,199,488970,251
Events in quadrant D956,334701,641

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04160
B04160
C04160
D04160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0739190
B0514260
C0414680
D0870120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460
B0460
C0460
D0460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20328322315.854978%
B203289194.520858%
C203281960.964187%
D20328379118.649154%

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 25003 20304 0 0 0.00% 0.00%
B 25003 20327 0 0 0.00% 0.00%
C 25003 20327 0 0 0.00% 0.00%
D 25003 20271 0 0 0.00% 0.00%

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 29 1133 11.22 299 281 76.0
A 7 110 945 8.74 299 281 76.0
A 0 30 896 8.1 299 281 76.0
B 2 9 993 11.23 309 297 62.0
B 2 8 778 7.76 309 297 62.0
B 5 128 773 7.68 309 297 62.0
C 7 111 847 6.74 317 297 81.6
C 3 126 843 6.69 317 297 81.6
C 2 191 839 6.64 317 297 81.6
D 6 83 706 6.05 273 249 75.5
D 3 14 704 6.03 273 249 75.5
D 4 160 690 5.84 273 249 75.5

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